Regional Centre of Advanced Technologies and Materials

Email: zdenek.travnicek@upol.cz
Address:Regional Centre of Advanced Technologies and Materials & Department of Inorganic Chemistry Faculty of Science, Palacký University in Olomouc, 17. Listopadu 12, Olomouc, CZ-77146, Czech Republic
Phone:+420-5-85634352
Fax:+420-5-85634954

Education and Career
1989    MSc degree (in Inorganic Chemistry)
1996    PhD degree (in Inorganic Chemistry)
2005   Full Professor of Inorganic Chemistry
2006    Head of the Department of Inorganic Chemistry, Faculty of Science, Palacký University in Olomouc, Czech Republic (http://agch.upol.cz)
2010    Research Programme Leader of the Regional Centre of Advanced Technologies and Materials (http://www.rcptm.com/)

Research Activities:

preparation and characterization of a new type of selected transition metal biologically active complexes and study of molecular magnets and molecular switches based on paramagnetic transition metal complexes
synthesis of the hybrid molecular-crystalline nanostructures with a functionalized nanocrystalline oxidic carrier and a bound coordination compound towards the use in the area of magnetic applications and targeted drug transport
in vitro and in vivo testing of a wide spectrum of biological activities

Publication activities:

Author or co-author of more than 130 papers in international journals (in accordance with Web of Science).
More than 760 citations.
Book: J. Marek, Z. Trávníček: Single crystal X-ray analysis (Monokrystalová rentgenová strukturní analýza), Publisher: Palacký University in Olomouc Publisher, 2002. 170 pages, 1st Edition, ISBN-80-244-0551-2.

Selected Publications (last 5 years):
1) Dvořák, Z.; Štarha, P.; Trávníček, Z.: Evaluation of in vitro cytotoxicity of 6-benzylamino-purine carboplatin derivatives against human cancer cell lines and primary human hepatocytes, Toxicol. In Vitro, 2011, 25, 652. IF₂₀₀₉ = 2.060
2) Trávníček, Z.; Štarha, P.; Popa, I.; Vrzal, R.; Dvořák, Z.: Roscovitine-Based CDK Inhibitors Acting as N-Donor Ligands in the Platinum(II) Oxalato Complexes: Preparation, Characterization and In Vitro Cytotoxicity, Eur. J. Med. Chem., 2010, 45, 4609-4614. IF₂₀₀₉ = 3.269
3) Dvořák, L.; Popa, I.; Štarha, P.; Trávníček, Z.; Dvořák, Z.: In Vitro Cytotoxic-Active Platinum(II) Complexes Derived from Carboplatin and Involving Purine Derivatives. Eur. J. Inorg. Chem., 2010, 22, 3441-3448. IF₂₀₀₉ = 2.941
4) Štarha, P.; Trávníček, Z.; Popa. I.: Platinum(II) oxalato complexes with adenine-based carrier ligands showing significant in vitro antitumor activity Source. J. Inorg. Biochem., 2010, 104(6), 639-647. IF₂₀₀₉ = 3.252
5) Herchel, R.; Šindelář, Z.; Trávníček, Z.; Zbořil, R.; Vančo, J.: Novel 1D Chain Fe(III)-salen-like Complexes Involving Anionic Heterocyclic N-Donor Ligands. Synthesis, X-ray Structure, Magnetic, ;⁵⁷Fe Mössbauer, and Biological Activity Studies, Dalton Trans., 2009, 9870-9880. IF₂₀₀₉ = 4.081
6) Štarha, P.; Trávníček, Z.; Herchel, R.; Popa, I.; Suchý, P. Vančo, J.: Dinuclear copper(II) complexes containing 6-(benzylamino)purines as bridging ligands: Synthesis, characterization, and in vitro and in vivo antioxidant activities. J. Inorg. Biochem., 2009, 130 (3), 432. IF₂₀₀₉ = 3.252
7) Trávníček, Z.; Mikulík, J.; Čajan, M.; Zbořil, R.; Popa, I.: Novel iron complexes bearing N6-substituted adenosine derivatives: Synthesis, magnetic, ⁵⁷Fe Mössbauer, DFT, and in vitro cytotoxicity studies. Bioorg. Med. Chem., 2008, 16(18), 8719. IF₂₀₀₉ = 2.822
8) Vančo, J.; Marek, J.; Trávníček, Z.; Račanská, E.; Muselík, J.; Švajlenová, O.: Synthesis, structural characterization, antiradical and antidiabetic activities of copper(II) and zinc(II) Schiff base complexes derived from salicylaldehyde and beta-alanine. J. Inorg. Biochem., 2008, 102(4), 595. IF₂₀₀₉ = 3.252
9) Szűčová, L.; Trávníček, Z.; Popa, I.; Marek, J.: Preparation and cis-to-trans transformation study of square-planar [Pt(L_n)₂Cl₂] complexes bearing cytokinins derived from 6-benzyl-aminopurine (L_n) by view of NMR spectroscopy and X-ray crystallography. Polyhedron, 2008, 27(12), 2710. IF₂₀₀₉ = 2.207
10) Trávníček, Z.; Szűčová, L.; Popa, I.: Synthesis, characterization and assessment of the cytotoxic properties of cis and trans-[Pd(L)₂Cl₂] complexes involving 6-benzylamino-9-isopropylpurine derivatives. J. Inorg. Biochem., 2007, 101(3), 477. IF₂₀₀₇ = 3.663.
11) Mal’arová, M.; Trávníček, Z.; Zbořil, R.; Černák, J.: [Co(en)₃][Fe(CN)₆]∙H₂O and [Co(en)₃][Fe(CN)₆]: A dehydration process investigated by single crystal X-ray analysis, thermal analysis and Mössbauer spectroscopy. Polyhedron, 2006, 25(15), 2935. IF₂₀₀₇ = 1.756
12) Szűčová, L.; Trávníček, Z.; Zatloukal, M.; Popa, I.: Novel platinum(II) and palladium(II) complexes with cyclin-dependent kinase inhibitors: Synthesis, characterization and antitumour activity. Bioorg. Med. Chem., 2006, 14(2), 479. IF₂₀₀₇ = 2.662
13) Trávníček, Z.; Kryštof, V.; Šipl, M.: Zinc(II) complexes with potent cyclin-dependent kinase inhibitors derived from 6-benzylaminopurine: Synthesis, characterization, X-ray structures and biological activity. J. Inorg. Biochem., 2006, 100(2), 214. IF₂₀₀₇ = 3.663

Show publications

Publications

2011

R. Herchel, Z. Travnicek, and R. Zboril, “Tuning of the Critical Temperature in Iron(II) Spin-Crossover Materials
Based on Bridging Polycyanidometallates: Pentacyanidonitrosylferrate(II)
and Hexacyanidoplatinate(IV),” INORGANIC CHEMISTRY, vol. 50, iss. 24, pp. 12390-12392, 2011.
[Bibtex]

@article ISI:000297782200017,
Author = Herchel, Radovan and Travnicek, Zdenek and Zboril, Radek,
Title = Tuning of the Critical Temperature in Iron(II) Spin-Crossover Materials
   Based on Bridging Polycyanidometallates: Pentacyanidonitrosylferrate(II)
   and Hexacyanidoplatinate(IV),
Journal = INORGANIC CHEMISTRY,
Year = 2011,
Volume = 50,
Number = 24,
Pages = 12390-12392,
Month = DEC 19,
Abstract = The reactions of iron(II) sulfate,
   4-amino-3,5-di-2-pyridyl-4H-1,2,4-triazole (abpt), and
   pentacyanidonitrosylferrate(II) or hexacyanidoplatinate(IV) resulted in
   the formation of one-dimensional iron(II) spin-crossover compounds
   [Fe(abpt)(2)(mu-Fe(CN)(5)(NO))](n) (1) and
   [Fe(abpt)(2)(mu-Pt(CN)(6))](n) (2) with the spin-transition critical
   temperature near or above room temperature accompanied by
   thermochromism. Furthermore, it has been proven that the critical
   temperature T(c) is influenced by the type of dianionic
   polycyanidometallate within the series of discussed systems, and it
   changes in the sequence of [Fe(CN)(5)(NO)](2-) < \Pt(CN)(6))](2-) <
   [Ni(CN)(4))](2-) approximate to [Pd(CN)(4))\(2-) approximate to
   [Pt(CN)(4))](2-).,
DOI = 10.1021/ic201702j,
ISSN = 0020-1669,
Unique-ID = ISI:000297782200017,

R. Pastorek, P. Starha, T. Peterek, and Z. Travnicek, "Nickel(IV) dithiocarbamato complexes of the [Ni(ndtc)(3)]X type: X-ray
structure of [Ni(hmidtc)(3)][FeCl(4)]," POLYHEDRON, vol. 30, iss. 17, pp. 2795-2800, 2011.
[Bibtex]

@article ISI:000296996500006,
Author = Pastorek, Richard and Starha, Pavel and Peterek, Tomas and Travnicek,
   Zdenek,
Title = Nickel(IV) dithiocarbamato complexes of the [Ni(ndtc)(3)]X type: X-ray
   structure of [Ni(hmidtc)(3)][FeCl(4)],
Journal = POLYHEDRON,
Year = 2011,
Volume = 30,
Number = 17,
Pages = 2795-2800,
Month = NOV 3,
Abstract = A series of fourteen octahedral nickel(IV) dithiocarbamato complexes of
   the general formula \Ni(ndtc)(3)]X center dot yH(2)O \ndtc stands for
   the appropriate dithiocarbamate anion, X stands for ClO(4)(-) (1-8; y =
   0) or [FeCl(4)](-) (9-14; y = 0 for 9-12, 1 for 13 and 0.5 for 14) was
   prepared by the oxidation of the corresponding nickel(II) complexes,
   i.e. [Ni(ndtc)(2)], with NOClO(4) or FeCl(3). The complexes, involving
   a high-valent Ni(IV)S(6) core, were characterized by elemental analysis
   (C, H, N. Cl and Ni), UV-Vis and FTIR spectroscopy, thermal analysis and
   magnetochemical and conductivity measurements. The X-ray structure of
   \Ni(hmidtc)(3)][FeCl(4)] (9) was determined \it consists of
   covalently discrete complex [Ni(hmidtc)(3)](+) cations and
   [FeCl(4)](-) anions\ and this revealed slightly distorted octahedral
   and tetrahedral geometries within the complex cations, and anions,
   respectively. The Ni(IV) atom is six-coordinated by three bidentate
   S-donor hexamethyleneiminedithiocarbamate anions (hmidtc), with Ni-S
   bond lengths ranging from 2.2597(5) to 2.2652(5)angstrom, while the
   shortest Ni center dot center dot center dot Cl and Ni center dot center
   dot center dot Fe distances equal 4.1043(12), and 6.2862(6) angstrom,
   respectively. Moreover, the formal oxidation state of iron in
   (FeCl(4)](-) as well as the coordination geometry in its vicinity was
   also proved by (57)Fe Mossbauer spectroscopy in the case of 9. (C) 2011
   Elsevier Ltd. All rights reserved.,
DOI = 10.1016/j.poly.2011.08.022,
ISSN = 0277-5387,
Unique-ID = ISI:000296996500006,

R. Herchel, J. Tucek, Z. Travnicek, D. Petridis, and R. Zboril, "Crystal Water Molecules as Magnetic Tuners in Molecular Metamagnets
Exhibiting Antiferro-Ferro-Paramagnetic Transitions," INORGANIC CHEMISTRY, vol. 50, iss. 18, pp. 9153-9163, 2011.
[Bibtex]

@article ISI:000294699700054,
Author = Herchel, Radovan and Tucek, Jiri and Travnicek, Zdenek and Petridis,
   Dimitris and Zboril, Radek,
Title = Crystal Water Molecules as Magnetic Tuners in Molecular Metamagnets
   Exhibiting Antiferro-Ferro-Paramagnetic Transitions,
Journal = INORGANIC CHEMISTRY,
Year = 2011,
Volume = 50,
Number = 18,
Pages = 9153-9163,
Month = SEP 19,
Abstract = We studied the effects of the number of crystal water molecules on the
   magnetic behavior of \[Ni(en)(2)](3)[Fe(CN)(6)](2)center dot
   xH(2)O\(n) (1-3) (where en = ethylenediamine and x = 3, 2, or 0)
   coordination polymers by (57)Fe Mossbauer spectroscopy, single-crystal
   X-ray diffraction, and magnetization measurements. Magnetic phase
   diagrams constructed for all three compounds indicate that they behave
   as metamagnets exhibiting very rare field-induced
   antiferro-ferro-paramagnetic transitions. The number of crystal water
   molecules has a major effect on the Neel temperature, critical field,
   and magnetic hardness of the compounds in the ferromagnetic state.
   Moreover, the systems behave as molecular magnetic sponges, changing
   their magnetic properties due to the controllable and reversible
   dehydration/hydration process.,
DOI = 10.1021/ic201358c,
ISSN = 0020-1669,
Unique-ID = ISI:000294699700054,

R. Pastorek, Z. Travnicek, and P. Starha, "Octahedral nickel(II) hexamethyleneimine-dithiocarbamato complexes
involving bidentate N,N-donor ligands," INORGANICA CHIMICA ACTA, vol. 373, iss. 1, pp. 286-290, 2011.
[Bibtex]

@article ISI:000291244600042,
Author = Pastorek, Richard and Travnicek, Zdenek and Starha, Pavel,
Title = Octahedral nickel(II) hexamethyleneimine-dithiocarbamato complexes
   involving bidentate N,N-donor ligands,
Journal = INORGANICA CHIMICA ACTA,
Year = 2011,
Volume = 373,
Number = 1,
Pages = 286-290,
Month = JUL 15,
Abstract = The nickel(II) complexes of the compositions
   [Ni(hmidtc)(bpy)(2)]ClO(4) (I), [Ni(hmidtc)(phen)(2)] ClO(4) (II),
   [Ni(hmidtc)(phen)(2)] SCN (III), [Ni(hmidtc)(phen)(2)]PF(6) (IV),
   [Ni(hmidtc)(phen)(2)]BPh(4) (V), [Ni(hmidtc) (phen)(2)]AcO center
   dot 2H(2)O (VI) and [Ni(hmidtc)(phen)(2)]Br center dot H(2)O (VII),
   involving a combination of one hexamethyleneimine-dithiocarbamate anion
   (hmidtc) and two bidentate N, N-donor ligands (2,2'-bipyridine (bpy) for
   I or 1,10-phenanthroline (phen) for II-VII), have been prepared. The
   compounds were characterized by elemental analysis, molar conductivity
   measurements, UV-Vis and IR spectroscopy, magnetochemical measurements
   and thermal analysis. A single-crystal X-ray analysis of the complex I
   revealed a distorted octahedral geometry with the nickel(II) ion
   coordinated by four nitrogen atoms (from two bidentate-coordinated bpy
   molecules) and two sulfur atoms (from one bidentate-coordinated hmidtc
   anion), together giving an NiN(4)S(2) donor set. (C) 2011 Elsevier B. V.
   All rights reserved.,
DOI = 10.1016/j.ica.2011.03.010,
ISSN = 0020-1693,
Unique-ID = ISI:000291244600042,

Z. Travnicek, M. Matikova-Malarova, R. Novotna, J. Vanco, K. Stepankova, and P. Suchy, "In vitro and in vivo biological activity screening of Ru(III) complexes
involving 6-benzylaminopurine derivatives with higher pro-apoptotic
activity than NAMI-A," JOURNAL OF INORGANIC BIOCHEMISTRY, vol. 105, iss. 7, pp. 937-948, 2011.
[Bibtex]

@article ISI:000291518700002,
Author = Travnicek, Zdenek and Matikova-Malarova, Miroslava and Novotna, Radka
   and Vanco, Jan and Stepankova, Kamila and Suchy, Pavel,
Title = In vitro and in vivo biological activity screening of Ru(III) complexes
   involving 6-benzylaminopurine derivatives with higher pro-apoptotic
   activity than NAMI-A,
Journal = JOURNAL OF INORGANIC BIOCHEMISTRY,
Year = 2011,
Volume = 105,
Number = 7,
Pages = 937-948,
Month = JUL,
Abstract = A series of novel octahedral ruthenium(III) complexes involving
   6-benzylaminopurine (L) derivatives as N-donor ligands has been prepared
   by the reaction of [(DMSO)(2)H][trans-RuCl(4)(DMSO)(2)] with the
   corresponding L derivative. The complexes 1-12 have the general
   compositions trans-[RuCl(4)(DMSO)(n-Cl-LH)] center dot xSol (1-3),
   trans-[RuCl(4) (DMSO)(n-Br-LH)] center dot xSol (4-6),
   trans-[RuCl(4)(DMSO)(n-OMe-LH) center dot-xSol (7-9) and
   trans-[RuCl(4)(DMSO)(n-OH-LH)] center dot xSol (10-12); n = 2, 3, and
   4, x = 0-1.5; and Sol = H(2)O, DMSO, EtOH and/or (Me)(2)CO. The
   complexes have been thoroughly characterized by elemental analysis,
   UV-visible, FTIR, Raman, and EPR spectroscopy, ES + (positive ionization
   electrospray) mass spectrometry, thermal analysis, cyclic voltammetry,
   magnetic and conductivity measurements. The X-ray molecular structure of
   trans-[RuCl(4)(DMSO)(3-Br-LH)] center dot (Me)(2)CO (5) revealed the
   distorted octahedral coordination in the vicinity of the central atom,
   and also confirmed that the 3-Br-L ligand is present as the
   N3-protonated N7-H tautomer and is coordinated to Ru(III) through the N9
   atom of the purine moiety. The tested complexes have been found to be in
   vitro non-cytotoxic against 1(562, G361, HOS and MCF7 human cancer cell
   lines with IC(50)> 100 mu M in contrast to the moderate results
   regarding the antiradical activity with IC(50)approximate to 10(-3) M.
   On the contrary, in vivo antitumor activity screening showed that the
   prepared Ru(III) complexes possess higher pro-apoptotic activity than
   NAMI-A. The reduction of Ru(III) to Ru(II) and Ru(II)-species formation
   in tumor tissues was confirmed by means of a simple method of detection
   and visualization of intracellular Rupp by fluorescence microscopy. The
   originality of this method is based on the preparation of a
   Ru(II)-bipyridine complex in situ. (C) 2011 Elsevier Inc. All rights
   reserved.,
DOI = 10.1016/j.jinorgbio.2011.04.002,
ISSN = 0162-0134,
Unique-ID = ISI:000291518700002,

M. Kubala, J. Vacek, I. Popa, M. Janovska, P. Kosina, J. Ulrichova, Z. Travnicek, and V. Simanek, "The fluorescence properties and NMR analysis of protopine and
allocryptopine," JOURNAL OF LUMINESCENCE, vol. 131, iss. 7, pp. 1340-1345, 2011.
[Bibtex]

@article ISI:000291132900016,
Author = Kubala, Martin and Vacek, Jan and Popa, Igor and Janovska, Marika and
   Kosina, Pavel and Ulrichova, Jitka and Travnicek, Zdenek and Simanek,
   Vilim,
Title = The fluorescence properties and NMR analysis of protopine and
   allocryptopine,
Journal = JOURNAL OF LUMINESCENCE,
Year = 2011,
Volume = 131,
Number = 7,
Pages = 1340-1345,
Month = JUL,
Abstract = The fluorescence properties of protopine and allocryptopine in aqueous
   and organic environments are described for the first time. The
   fluorescence of alkaloids and their pH-dependent interconversion to
   cationic forms (transannular interaction) were studied using
   steady-state and time-resolved fluorescence techniques. For the analysis
   of tricyclic base and cis/trans tetracyclic cations of the alkaloids,
   NMR and X-ray crystallography were used. (C) 2011 Elsevier B.V. All
   rights reserved.,
DOI = 10.1016/j.jlumin.2011.02.038,
ISSN = 0022-2313,
Unique-ID = ISI:000291132900016,

M. Cajan and Z. Travnicek, "Structural (X-ray), spectral (FT-IR and Raman) and quantum chemical
investigations of a series of 6-benzylaminopurine derivatives," JOURNAL OF MOLECULAR STRUCTURE, vol. 994, iss. 1-3, pp. 350-359, 2011.
[Bibtex]

@article ISI:000291085700051,
Author = Cajan, Michal and Travnicek, Zdenek,
Title = Structural (X-ray), spectral (FT-IR and Raman) and quantum chemical
   investigations of a series of 6-benzylaminopurine derivatives,
Journal = JOURNAL OF MOLECULAR STRUCTURE,
Year = 2011,
Volume = 994,
Number = 1-3,
Pages = 350-359,
Month = MAY 17,
Abstract = The structural and spectroscopic properties of
   6-(2-methylbenzylamino)purine 1, 6-(4-methylbenzylamino)purine 2,
   6-(3,4-dimethoxybenzylamino)purine 3,
   2-chloro-6-(3-bromobenzylamino)-9-isopropylpurine 4 and
   2-chloro-6-(3,4-dichlorobenzylamino)-9-isopropylpurine 5 have been
   investigated by means of single crystal X-ray diffraction analysis,
   FT-IR and Raman spectroscopy, and quantum chemical calculations, where
   I-IF, OFT, RI-MP2 and MP2 methods in combination with the cc-pVDZ basis
   set have been used. The theoretically obtained structural as well as
   spectral parameters have been compared with those experimentally
   obtained. One of the unusual structural features is the finding that the
   electroneutral form of 6-(2-methylbenzylamino)purine 1 is protonated at
   the N7 position of the purine ring, which is not a typical protonation
   site for N9-unsubstituted adenine derivatives. (C) 2011 Elsevier B.V.
   All rights reserved.,
DOI = 10.1016/j.molstruc.2011.03.049,
ISSN = 0022-2860,
Unique-ID = ISI:000291085700051,

Z. Dvorak, P. Starha, and Z. Travnicek, "Evaluation of in vitro cytotoxicity of 6-benzylaminopurine carboplatin
derivatives against human cancer cell lines and primary human
hepatocytes," TOXICOLOGY IN VITRO, vol. 25, iss. 3, pp. 652-656, 2011.
[Bibtex]

@article ISI:000288933100008,
Author = Dvorak, Zdenek and Starha, Pavel and Travnicek, Zdenek,
Title = Evaluation of in vitro cytotoxicity of 6-benzylaminopurine carboplatin
   derivatives against human cancer cell lines and primary human
   hepatocytes,
Journal = TOXICOLOGY IN VITRO,
Year = 2011,
Volume = 25,
Number = 3,
Pages = 652-656,
Month = APR,
Abstract = A series of seven platinum(II) cyclobutane-1,1-dicarboxylato (cbdc)
   complexes \[Pt(cbdc)(L(n))(2)], 1-7\, derived from carboplatin by a
   substitution of two NH(3) molecules for two 2,6,9-trisubstituted
   6-benzyl-aminopurinc-based N-donor ligands (L(n)), was studied by the
   MTT assay for their in vitro cytotoxic activity against seven human
   cancer cell lines, i.e. lung carcinoma (A549), cervix epithelioid
   carcinoma (HeLa), osteosarcoma (HOS), malignant melanoma (G361), breast
   adenocarcinoma (MCP), ovarian carcinoma (A2780) and its
   cisplatin-resistant analogue (A2780cis), and against two primary
   cultures of human hepatocytes (LH31 and LH32). The prepared complexes
   were cytotoxic against several cancer cells, in some cases even more
   than cisplatin. The best results were achieved for complexes 1 (IC(50) =
   17.4 +/- 2.0 mu M) and 2 (IC(50) = 14.8 +/- 2.1 mu M) against HOS cells,
   1 (IC(50) = 15.1 +/- 6.8 mu M), 2 (IC(50) = 13.6 +/- 5.2 mu M) and 6
   (IC(50) = 19.0 +/- 6.6 mu M) against MCF7, 6 (IC(50) = 6.4 +/- 0.1 mu M)
   against A2780, and 1-6 (IC(50) = 15.6 +/- 4.0, 12.9 +/- 3.7, 15.8 +/-
   3.8, 16.6 +/- 5.5, 22.1 +/- 2.5, and 5.6 +/- 1.7 mu M, respectively)
   against A2780cis. Viability of human hepatocytes was not declined by the
   tested complexes up to the concentration of 50 mu M (for 1, 3-7) and 20
   mu M (for 2; caused by lower solubility of this complex). (c) 2011
   Elsevier Ltd. All rights reserved.,
DOI = 10.1016/j.tiv.2011.01.002,
ISSN = 0887-2333,
Unique-ID = ISI:000288933100008,

I. Nemec, R. Herchel, R. Boca, I. Svoboda, Z. Travnicek, L. Dlhan, K. Matelkova, and H. Fuess, "Heterobimetallic assemblies of Ni(II) complexes with a tetradentate
amine ligand and diamagnetic cyanidometallates," INORGANICA CHIMICA ACTA, vol. 366, iss. 1, pp. 366-372, 2011.
[Bibtex]

@article ISI:000285994200049,
Author = Nemec, Ivan and Herchel, Radovan and Boca, Roman and Svoboda, Ingrid and
   Travnicek, Zdenek and Dlhan, Lubor and Matelkova, Kristina and Fuess,
   Hartmut,
Title = Heterobimetallic assemblies of Ni(II) complexes with a tetradentate
   amine ligand and diamagnetic cyanidometallates,
Journal = INORGANICA CHIMICA ACTA,
Year = 2011,
Volume = 366,
Number = 1,
Pages = 366-372,
Month = JAN 30,
Abstract = Syntheses and crystal structures of nickel(II) complexes containing teta
   (teta = N,N'-bis(2-aminoethyl)ethane-1,2-diamine) as a tetradentate
   blocking ligand and cyanidometallic bridging complexes are described.
   The complexes [Ni(teta)(cis-mu(2)-Ni(CN)(4))] (1) and
   [\Ni(teta)\(3)(mu(6)-Co(CN)(6))] (ClO(4))(3) (2) exhibit a
   1D-polymeric structure whereas the heterometallic trinuclear complex
   [Ni(teta)(mu(1)-Ag(CN)(2))(2)] (3) forms a unique network. The weak
   antiferromagnetic exchange was found in polymeric species 1 and 2 by
   analyzing the magnetic data with several models in which either only
   susceptibility was treated or simultaneous fitting of temperature and
   magnetic field dependences of the magnetization was applied using the
   finite-size closed ring approach. Moreover, an effect of the zero-field
   splitting phenomenon (ZFS) was considered for 2 by advanced modeling of
   magnetic properties for varying axial ZFS parameter/isotropic exchange
   (D/J) ratios. (C) 2010 Elsevier B.V. All rights reserved.,
DOI = 10.1016/j.ica.2010.11.028,
ISSN = 0020-1693,
Unique-ID = ISI:000285994200049,

R. Novotna, I. Popa, and Z. Travnicek, "Zinc(II) chlorido complexes of protonated kinetin and its derivatives:
Synthesis, properties and X-ray structure of [Zn(Hkinetin)Cl(3)]center
dot kinetin," INORGANICA CHIMICA ACTA, vol. 365, iss. 1, pp. 113-118, 2011.
[Bibtex]

@article ISI:000285624200017,
Author = Novotna, Radka and Popa, Igor and Travnicek, Zdenek,
Title = Zinc(II) chlorido complexes of protonated kinetin and its derivatives:
   Synthesis, properties and X-ray structure of [Zn(Hkinetin)Cl(3)]center
   dot kinetin,
Journal = INORGANICA CHIMICA ACTA,
Year = 2011,
Volume = 365,
Number = 1,
Pages = 113-118,
Month = JAN 15,
Abstract = The syntheses and characterization of five novel zinc(II) complexes with
   protonated kinetin (6-furfurylaminopurine) and its derivatives are
   described. Based on the results following from elemental analyses (C, H,
   N), FTIR, Raman, (1)H and (13)C NMR spectroscopy, conductivity
   measurements, thermogravimetric (TG) and differential thermal analyses
   (DTA), and single crystal X-ray analysis, the complexes of the general
   composition [Zn(HL(n))Cl(3)]center dot xL(n) (1-5) have been prepared,
   where L(1) = kinetin (6-furfurylaminopurine), L(2) =
   6-(5-methylfurfurylamino) purine, L(3) = 2-chloro-6-furfurylaminopurine,
   L(4) = 2-chloro-6-(5-methylfurfurylamino) purine and L(5) =
   2-chloro-6-furfurylamino-9-isopropylpurine, and x = 1/2-2. The structure
   of [Zn(HL(1))Cl(3)]center dot L(1) (1) has been determined by single
   crystal X-ray analysis. The Zn(II) atom is tetrahedrally coordinated by
   three chlorido ligands and one N3-protonated organic molecule forming a
   ZnCl(3)N donor set. The organic ligand L(1) is coordinated to the Zn(II)
   centre through the N7 atom of the purine moiety. NMR spectroscopic study
   confirmed the N3 and N7 atom to be the protonation, and coordination
   site, respectively. (C) 2010 Elsevier B.V. All rights reserved.,
DOI = 10.1016/j.ica.2010.08.040,
ISSN = 0020-1693,
Unique-ID = ISI:000285624200017,

R. Herchel, Z. Travnicek, and R. Zboril, "Spin crossover behavior of a one-dimensional polymeric-chain compound
\[Fe(abpt)(2)(mu-Ni(CN)(4))]center dot xH(2)O\(n) (x=0.5 -> 0):
Synthesis, spectral, thermal and magnetic properties," INORGANICA CHIMICA ACTA, vol. 365, iss. 1, pp. 458-461, 2011.
[Bibtex]

@article ISI:000285624200068,
Author = Herchel, Radovan and Travnicek, Zdenek and Zboril, Radek,
Title = Spin crossover behavior of a one-dimensional polymeric-chain compound
   \[Fe(abpt)(2)(mu-Ni(CN)(4))]center dot xH(2)O\(n) (x=0.5 -> 0):
   Synthesis, spectral, thermal and magnetic properties,
Journal = INORGANICA CHIMICA ACTA,
Year = 2011,
Volume = 365,
Number = 1,
Pages = 458-461,
Month = JAN 15,
Abstract = A one-dimensional polymeric-chain iron(II)-nickel(II) cyanido-bridged
   complex of the composition \[Fe(abpt)(2)(mu-Ni(CN)(4))]center dot
   0.5H(2)O\(n) (1.0.5H(2)O), where abpt =
   4-amino-3,5-di-2-pyridyl-4H-1,2,4-triazole, was prepared and
   characterized by elemental and thermal analyses, FTIR and (57)Fe
   Mossbauer spectroscopies, and magnetic measurements. The incomplete spin
   crossover phenomenon was observed with approximately 12\% of the frozen
   high-spin fraction at low temperatures and with the spin transition
   critical temperature above room temperature. (C) 2010 Elsevier B.V. All
   rights reserved.,
DOI = 10.1016/j.ica.2010.08.030,
ISSN = 0020-1693,
Unique-ID = ISI:000285624200068,

R. Herchel, L. Pavelek, and Z. Travnicek, "Dinuclear and 1D iron(III) Schiff base complexes bridged by
4-salicylideneamino-1,2,4-triazolate: X-ray structures and magnetic
properties," DALTON TRANSACTIONS, vol. 40, iss. 44, pp. 11896-11903, 2011.
[Bibtex]

@article ISI:000296776200031,
Author = Herchel, Radovan and Pavelek, Lubomir and Travnicek, Zdenek,
Title = Dinuclear and 1D iron(III) Schiff base complexes bridged by
   4-salicylideneamino-1,2,4-triazolate: X-ray structures and magnetic
   properties,
Journal = DALTON TRANSACTIONS,
Year = 2011,
Volume = 40,
Number = 44,
Pages = 11896-11903,
Abstract = Four new iron(III) complexes were obtained by the reaction of
   4-salicylideneamino-1,2,4-triazole (Hsaltrz) and selected dinuclear
   mu-oxo-bridged iron(III) Schiff base complexes [\FeL(4)\(2)(mu-O)],
   where L(4) represents a terminal tetradentate dianionic Schiff-base
   ligand. X-ray structural analysis revealed a novel bridging mode of
   kappa N, kappa O of the saltrz ligand to form dinuclear complexes
   [\Fe(salen)(mu-saltrz)\(2)]center dot CH(3)OH (1) (H(2)salen =
   N,N'-ethylenebis(salicylimine)) and [\Fe(salpn)(mu-saltrz)\(2)] (2)
   (H(2)salpn = N,N'-1,2-propylenbis(salicylimine)), whereas
   one-dimensional (1D) zig-zag chains were formed in the case of
   [\Fe(salch)(mu-saltrz)\center dot 0.5CH(3)OH](n) (3) (H(2)salch =
   N,N'-cyclohexanebis(salicylimine)) and [Fe(salophen)(mu-saltrz)](n)
   (4) (H(2)salophen = N,N'-o-phenylenebis(salicylimine)). It was also
   shown that the rigidity of the terminal ligand L(4) can be considered as
   the key factor for the molecular dimensionality of the products. The
   thorough magnetic analysis based on SQUID experiments, including the
   isotropic exchange and the zero-field splitting of both temperature and
   field dependent data, was performed for dimeric (1 and 2) and also for
   polymeric compounds (3 and 4) and revealed weak antiferromagnetic
   exchange mediated by the saltrz anions with much larger D-parameter
   (vertical bar D vertical bar >> vertical bar J vertical bar).,
DOI = 10.1039/c1dt11127b,
ISSN = 1477-9226,
Unique-ID = ISI:000296776200031,

I. Nemec, R. Herchel, R. Boca, Z. Travnicek, I. Svoboda, H. Fuess, and W. Linert, "Tuning of spin crossover behaviour in iron(III) complexes involving
pentadentate Schiff bases and pseudohalides," DALTON TRANSACTIONS, vol. 40, iss. 39, pp. 10090-10099, 2011.
[Bibtex]

@article ISI:000295843100018,
Author = Nemec, Ivan and Herchel, Radovan and Boca, Roman and Travnicek, Zdenek
   and Svoboda, Ingrid and Fuess, Hartmut and Linert, Wolfgang,
Title = Tuning of spin crossover behaviour in iron(III) complexes involving
   pentadentate Schiff bases and pseudohalides,
Journal = DALTON TRANSACTIONS,
Year = 2011,
Volume = 40,
Number = 39,
Pages = 10090-10099,
Abstract = Investigations on a series of eight novel mononuclear iron(III) Schiff
   base complexes with the general formula [Fe(L(5))(L(1))]center dot S
   (where H(2)L(5) = pentadentate Schiff-base ligand, L(1) = a pseudohalido
   ligand, and S is a solvent molecule) are reported. Several different
   aromatic 2-hydroxyaldehyde derivatives were used in combination with a
   non-symmetrical triamine 1,6-diamino-4-azahexane to synthesize the
   H(2)L(5) Schiff base ligands. The consecutive reaction with iron(III)
   chloride resulted in the preparation of the [Fe(L(5))Cl] precursor
   complexes which were left to react with a wide range of the L(1)
   pseudohalido ligands. The low-spin compounds were prepared using the
   cyanido ligand: [Fe(3m-salpet)(CN)]center dot CH(3)OH (1a),
   [Fe(3e-salpet)(CN)]center dot H(2)O (1b), while the high-spin
   compounds were obtained by the reaction of the pseudohalido (other than
   cyanido) ligands with the [Fe(L(5))Cl] complex arising from
   salicylaldehyde derivatives: [Fe(3Bu5Me-salpet)(NCS)] (2a),
   [Fe(3m-salpet)(NCO)]center dot CH(3)OH (2b) and
   [Fe(3m-salpet)-(N(3))] (2c). The compounds exhibiting spin-crossover
   phenomena were prepared only when L(5) arose from
   2-hydroxy-1-naphthaldehyde (H(2)L(5) = H(2)napet):
   [Fe(napet)(NCS)]center dot CH(3)CN (3a, T(1/2) = 151 K),
   [Fe(napet)(NCSe)]center dot CH(3)CN (3b, T(1/2) = 170 K),
   [Fe(napet)(NCO)] (3c, T(1/2) = 155 K) and [Fe(napet)(N(3))], which,
   moreover, exhibits thermal hysteresis (3d, T(1/2)up arrow = 122 K,
   T(1/2)down arrow = 117 K). These compounds are the first examples of
   octahedral iron(III) spin-crossover compounds with the coordinated
   pseudohalides. We report the structure and magnetic properties of these
   complexes. The magnetic data of all the compounds were analysed using
   the spin Hamiltonian formalism including the ZFS term and in the case of
   spin-crossover, the Ising-like model was also applied.,
DOI = 10.1039/c1dt10696a,
ISSN = 1477-9226,
Unique-ID = ISI:000295843100018,

R. Buchtik, Z. Travnicek, J. Vanco, R. Herchel, and Z. Dvorak, "Synthesis, characterization, DNA interaction and cleavage, and in vitro
cytotoxicity of copper(II) mixed-ligand complexes with
2-phenyl-3-hydroxy-4(1H)-quinolinone," DALTON TRANSACTIONS, vol. 40, iss. 37, pp. 9404-9412, 2011.
[Bibtex]

@article ISI:000294666700010,
Author = Buchtik, Roman and Travnicek, Zdenek and Vanco, Jan and Herchel, Radovan
   and Dvorak, Zdenek,
Title = Synthesis, characterization, DNA interaction and cleavage, and in vitro
   cytotoxicity of copper(II) mixed-ligand complexes with
   2-phenyl-3-hydroxy-4(1H)-quinolinone,
Journal = DALTON TRANSACTIONS,
Year = 2011,
Volume = 40,
Number = 37,
Pages = 9404-9412,
Abstract = A series of mixed-ligand complexes [Cu(qui)(L)]NO(3)center dot xH(2)O
   (1-6), where Hqui = 2-phenyl-3-hydroxy-4(1H)-quinolinone, L =
   2,2'-bipyridine (bpy) (1), 1,10-phenanthroline (phen) (2),
   bis(2-pyridyl)amine (ambpy) (3), 5-methyl-1,10-phenanthroline (mphen)
   (4), 5-nitro-1,10-phenanthroline (nphen) (5) and bathophenanthroline
   (bphen) (6), have been synthesized and fully characterized. The X-ray
   structures of [Cu(qui)(phen)]NO(3)center dot H(2)O (2) and
   [Cu(qui)(ambpy)]NO(3) (3a) show a slightly distorted square-planar
   geometry in the vicinity of the central copper(II) atom. An in vitro
   cytotoxicity study of the complexes found significant activity against
   human osteosarcoma (HOS) and human breast adenocarcinoma (MCF7) cell
   lines, with the best results for complex 6, where IC(50) equals to 2.1
   +/- 0.2 mu M, and 2.2 +/- 0.4 mu M, respectively. The strong
   interactions of the complexes with calf thymus DNA (CT-DNA) and high
   ability to cleave pUC19 DNA plasmid were found. A correlation has been
   found between the in vitro cytotoxicity and DNA cleavage studies of the
   complexes.,
DOI = 10.1039/c1dt10674k,
ISSN = 1477-9226,
Unique-ID = ISI:000294666700010,

Z. Travnicek, R. Novotna, J. Marek, I. Popa, and M. Sipl, "Transformations of the natural cytokinin N6-isopentenyladenine in
aqueous acidic media: structural aspects," ORGANIC & BIOMOLECULAR CHEMISTRY, vol. 9, iss. 16, pp. 5703-5713, 2011.
[Bibtex]

@article ISI:000293230300015,
Author = Travnicek, Zdenek and Novotna, Radka and Marek, Jaromir and Popa, Igor
   and Sipl, Michal,
Title = Transformations of the natural cytokinin N6-isopentenyladenine in
   aqueous acidic media: structural aspects,
Journal = ORGANIC \& BIOMOLECULAR CHEMISTRY,
Year = 2011,
Volume = 9,
Number = 16,
Pages = 5703-5713,
Abstract = N6-Isopentenyladenine (L1) was subjected to variously acidic media in
   0.1 M, 1 M and 2 M HCl. In dependence on the acidity of the medium, the
   formation of three main acid hydrolysis products, involving the
   N6-isopentenyladeninium (HL1) (1),
   7,8,9,10-tetrahydro-7,7-dimethyl-3H-pyrimido[ 2,1-i]purin-6-ium (HL2)
   (2) or
   5-amino-4-(4,4-dimethyl-3,4,5,6-tetrahydropyrimidin-2-yl)-imidazolium
   (H(2)L3) (3-5) cations, were determined and characterized by
   multinuclear solution-state NMR spectroscopy and in the solid state by
   single crystal X-ray analysis. The coordination abilities of these
   transformation products have been also investigated. The compounds of
   the compositions [Zn(HL1)Cl(3)]center dot H(2)O (1),
   [Zn(3)(HL2)(2)Cl(8)] (2), (H(2)L3)[CuCl(4)] (4) and
   (H(2)L3)[ZnCl(4)] (5) have been prepared in dependence on the acidity
   of the medium used by the reactions of L1 with ZnCl(2)center dot
   1.5H(2)O or CuCl(2)center dot 2H(2)O. Based on the NMR spectroscopic and
   X-ray crystallographic results, the mechanism of transformation of L1 in
   the acidic medium, involving the protonation, cyclization and ring
   fission, has been suggested.,
DOI = 10.1039/c1ob05649b,
ISSN = 1477-0520,
Unique-ID = ISI:000293230300015,

I. Frysova, Z. Travnicek, J. Slouka, and P. Cankar, "Polycyclic heterocycles with acidic N-H groups IX(1). The unexpected
decomposition route of
2-(3-oxo-3,4-dihydroquinoxalin-2-yl)benzenediazosulfonates," ARKIVOC, iss. Part 2, pp. 127-136, 2011.
[Bibtex]

@article ISI:000290685100010,
Author = Frysova, Iveta and Travnicek, Zdenek and Slouka, Jan and Cankar, Petr,
Title = Polycyclic heterocycles with acidic N-H groups IX(1). The unexpected
   decomposition route of
   2-(3-oxo-3,4-dihydroquinoxalin-2-yl)benzenediazosulfonates,
Journal = ARKIVOC,
Year = 2011,
Number = Part 2,
Pages = 127-136,
Abstract = The diazosulfonates obtained by diazocoupling of
   2-(3-oxo-3,4-dihydroquinoxalin-2-yl)benzene-diazonium chloride and its
   6,7-dimethyl-derivative 2a,b with sodium sulfite decompose by an unique
   route in aqueous solution to afford
   1-(1H-indazol-3-yl)-1H-benzimidazol-2(3H)-one 4a, and its
   5,6-dimethyl-derivative 4b, respectively. The structure of 4a was
   confirmed by single crystal X-ray analysis.,
ISSN = 1551-7004,
Unique-ID = ISI:000290685100010,

2010

J. Vanco, Z. Travnicek, J. Marek, and R. Herchel, "Synthesis, spectral (UV-Vis, IR, ESI-MS), magnetic and structural
characterizations, and the antimicrobial effect of potassium
isothiocyanato-(N-salicylidene-amino-acidato)cuprates," INORGANICA CHIMICA ACTA, vol. 363, iss. 14, pp. 3887-3896, 2010.
[Bibtex]

@article ISI:000283051600035,
Author = Vanco, Jan and Travnicek, Zdenek and Marek, Jaromir and Herchel, Radovan,
Title = Synthesis, spectral (UV-Vis, IR, ESI-MS), magnetic and structural
   characterizations, and the antimicrobial effect of potassium
   isothiocyanato-(N-salicylidene-amino-acidato)cuprates,
Journal = INORGANICA CHIMICA ACTA,
Year = 2010,
Volume = 363,
Number = 14,
Pages = 3887-3896,
Month = NOV 25,
Abstract = A series of potassium isothiocyanato-(N-salicylidene-amino acidato)
   cuprates with the general formulas of
   K(2)[Cu(2)(sal-aa)(2)(mu-NCS)(2)]center dot nH(2)O, where n = 0 or 4
   and (sal-aa) stands for the dianion of N-salicylideneamino acid derived
   from glycine (I), DL-alpha-alanine (II), DL-valine (III),
   DL-phenylalanine (IV), and \K[Cu(sal-beta-ala)( mu-NCS)]\(n) for
   beta-alanine (V), respectively, was synthesized and fully characterized
   by elemental analysis, UV-Vis and IR spectroscopy, ESI-MS spectrometry,
   magnetic measurements, and X-ray structural analysis (II and IV). It has
   been found that the copper(II) atom adopts a distorted square-pyramidal
   surrounding in the dimeric complexes I-IV, while the geometry in the
   polymeric complex V can be described as distorted square-bipyramidal.
   The analysis of magnetic properties revealed weak antiferromagnetic
   exchanges in the dinuclear species I-IV and an alternating
   ferro/antiferromagnetic exchange in the case of 1D-polymeric compound V.
   Moreover, the complexes were tested for their antibacterial activity
   against the G+ bacteria Staphylococcus aureus, G- bacteria Escherichia
   coli, filamentous fungi Microsporum gypseum, and yeast Candida albicans.
   The best results were achieved with G+ bacteria S. aureus with MIC
   values in the range of 0.22-0.57 mmol L (1). It may be concluded that
   both the antimicrobial and antifungal activity decreased within the
   tested group of cuprates derived from alpha-amino acids with the
   increasing lipophility of the complexes, i.e. I -> IV. (C) 2010 Elsevier
   B.V. All rights reserved.,
DOI = 10.1016/j.ica.2010.07.041,
ISSN = 0020-1693,
Unique-ID = ISI:000283051600035,

Z. Travnicek, P. Starha, I. Popa, R. Vrzal, and Z. Dvorak, "Roscovitine-based CDK inhibitors acting as N-donor ligands in the
platinum(II) oxalato complexes: Preparation, characterization and in
vitro cytotoxicity," EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY, vol. 45, iss. 10, pp. 4609-4614, 2010.
[Bibtex]

@article ISI:000282112700024,
Author = Travnicek, Zdenek and Starha, Pavel and Popa, Igor and Vrzal, Radim and
   Dvorak, Zdenek,
Title = Roscovitine-based CDK inhibitors acting as N-donor ligands in the
   platinum(II) oxalato complexes: Preparation, characterization and in
   vitro cytotoxicity,
Journal = EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY,
Year = 2010,
Volume = 45,
Number = 10,
Pages = 4609-4614,
Month = OCT,
Abstract = The reactions of potassium bis(oxalato)platinate dihydrate with two
   molar equivalents of the potent adenine-based cyclin-dependent kinase
   inhibitor 2-(1-ethyl-2-hydroxyethylamino)-N6-(benzyl)-9-isopropyladenine
   (Roscovitine: Ros) and its benzyl-substituted analogues, i.e
   2-(1-ethy1-2-hydroxyethylamino)-N6-(2-methoxybenzyl)-9-isopropyladenine
   (2OMeRos),
   2-(1-ethy1-2-hydroxyethylamino)-N6-(3-methoxybenzyl)-9-isopropyladenine
   (3OMeRos) and
   2-(1-ethy1-2-hydroxyethylamino)-N6-(4-methoxybenzyl)-9-isopropyladenine
   (4OMeRos), were performed and the [Pt(oxXRos)(2)] 3/4 H(2)O (1),
   [Pt(ox)(2OMeRos)(2)] H(2)O (2), (Pt(ox)(3OMeR-os)(2)] 1/2H(2)O (3) and
   [Pt(ox)(4OMeRos)(2)] 3/4 H(2)O (4) platinum(II) oxalato complexes were
   obtained. The methods of the elemental analysis, IR. Raman and NMR
   spectroscopy, ESI + mass spectrometry, molar conductivity measurement
   and TG/DTA thermal analysis were performed to characterize the obtained
   products. The complexes 1-4 Involve tetracoordinated central Pt(11) atom
   with one bidentate-coordinated oxalate dianion (ox) and two monodentate
   adenine-based molecules (nRos), thus giving the square-planar geometry
   around the metal centre with a PtN(2)O(2) donor set. In vitro cytotoxic
   activity of the complexes against ovarian carcinoma (A2780), cisplatin
   resistant ovarian carcinoma (A2780cis). malignant melanoma (G-361), lung
   carcinoma (A549). cervix epitheloid carcinoma (HeLa). breast
   adenocarcinoma (MCF7) and osteosarcoma (HOS) human cancer cell lines was
   evaluated. All the tested complexes exceeded the in vitro cytotoxicity
   of cisplatin and oxaliplatin against HeLa. A2780cis and, except for 2,
   also against HOS cancer cells The complex 1 was also tested for its
   cytotoxicity in primary cultures of human hepatocytes and it was not
   found to be hepatotoxic up to the concentration of 50.0 mu M. (C) 2010
   Elsevier Masson SAS. All rights reserved.,
DOI = 10.1016/j.ejmech.2010.07.025,
ISSN = 0223-5234,
Unique-ID = ISI:000282112700024,

R. Vrzal, P. Starha, Z. Dvorak, and Z. Travnicek, "Evaluation of in vitro cytotoxicity and hepatotoxicity of platinum(II)
and palladium(II) oxalato complexes with adenine derivatives as carrier
ligands," JOURNAL OF INORGANIC BIOCHEMISTRY, vol. 104, iss. 10, pp. 1130-1132, 2010.
[Bibtex]

@article ISI:000281525200017,
Author = Vrzal, Radim and Starha, Pavel and Dvorak, Zdenek and Travnicek, Zdenek,
Title = Evaluation of in vitro cytotoxicity and hepatotoxicity of platinum(II)
   and palladium(II) oxalato complexes with adenine derivatives as carrier
   ligands,
Journal = JOURNAL OF INORGANIC BIOCHEMISTRY,
Year = 2010,
Volume = 104,
Number = 10,
Pages = 1130-1132,
Month = OCT,
Abstract = In vitro antitumour activity of the [Pt(ox)(L(n))(2)] (1-7) and
   [Pd(ox)(L(n))(2)] (8-14) oxalato (ox) complexes involving
   N6-benzyl-9-isopropyladenine-based N-donor carrier ligands (L(n))
   against ovarian carcinoma (A2780), cisplatin resistant ovarian carcinoma
   (A2780cis), malignant melanoma (G-361), lung carcinoma (A549), cervix
   epitheloid carcinoma (HeLa), breast adenocarcinoma (MCF7) and
   osteosarcoma (HOS) human cancer cell lines was studied. Some of the
   tested complexes were even several times more cytotoxic as compared with
   cisplatin employed as a positive control. The improved cytotoxic effect
   was demonstrated for the platinum(II) complexes 3 (IC(50) = 3.2 +/- 1.0
   mu M and 3.2 +/- 0.6 mu M) and 5 (IC(50) = 4.0 +/- 1.0 mu M and 4.1 +/-
   1.4 mu M) against A2780 and A2780cis, as compared with 11.5 +/- 1.6 mu
   M, and 30.3 +/- 6.1 mu M determined for cisplatin, respectively. The
   significant in vitro cytotoxicity against MCF7 (IC(50) = 8.2 +/- 3.8 mu
   M for 12) and A2780 (IC(50) = 5.4 +/- 1.2 mu M for 14) was evaluated for
   the palladium(II) oxalato complexes, which again exceeded cisplatin,
   whose IC(50) equalled 19.6 +/- 4.3 mu M against the MCF7 cells. Selected
   complexes were also screened for their in vitro cytotoxic effect in
   primary cultures of human hepatocytes and they were found to be
   non-hepatotoxic. (c) 2010 Elsevier Inc. All rights reserved.,
DOI = 10.1016/j.jinorgbio.2010.07.002,
ISSN = 0162-0134,
Unique-ID = ISI:000281525200017,

A. Klanicova, Z. Travnicek, J. Vanco, I. Popa, and Z. Sindelar, "Dinuclear copper(II) perchlorate complexes with 6-(benzylamino)purine
derivatives: Synthesis, X-ray structure, magnetism and antiradical
activity," POLYHEDRON, vol. 29, iss. 13, pp. 2582-2589, 2010.
[Bibtex]

@article ISI:000282389900003,
Author = Klanicova, Alena and Travnicek, Zdenek and Vanco, Jan and Popa, Igor and
   Sindelar, Zdenek,
Title = Dinuclear copper(II) perchlorate complexes with 6-(benzylamino)purine
   derivatives: Synthesis, X-ray structure, magnetism and antiradical
   activity,
Journal = POLYHEDRON,
Year = 2010,
Volume = 29,
Number = 13,
Pages = 2582-2589,
Month = SEP 3,
Abstract = The reactions of Cu(ClO4)(2)center dot 6H(2)O with 6-(benzylamino)purine
   derivatives in a stoichiometric 1:2 metal-to-ligand ratio led to the
   formation of penta-coordinated dinuclear complexes of the formula
   [Cu(2)(mu-L(1-8))(4)(ClO(4))2](ClO(4))(2).nsolv, where L(1) =
   6-(2-fluorobenzylamino)purine (complex 1), L(2) =
   6-(3-fluorobenzylamino)purine (2), L(3)= 6-(4-fluorobenzylamino)purine
   (3), L(4)= 6-(2-chlorobenzylamino)purine (4), L(5) =
   6-(3-chlorobenzylamino)purine (5), L(6)=6-(4-chlorobenzylamino)purine
   (6), L(7)= 6-(3-methoxybenzylamino)purine (7) and L(8)=
   6-(4-methoxybenzylamino)purine (8); n = 0-4 and solv = H(2)O, EtOH or
   MeOH. All the complexes have been fully characterized by elemental
   analysis, FTIR, UV-Vis and EPR spectroscopy, and by magnetic and
   conductivity measurements. Variable temperature (80-300 K) magnetic
   susceptibility data of 1-8 showed the presence of a strong
   antiferromagnetic exchange interaction between two Cu(II) (S= 1/2) atoms
   with J ranging from -150.0(1) to -160.3(2)cm(-1). The compound 6 center
   dot 4EtOH center dot H(2)O was structurally characterized by single
   crystal X-ray analysis. The Cu center dot center dot center dot Cu
   separation has been found to be 2.9092(8) angstrom. The antiradical
   activity of the prepared compounds was tested by in vitro SOD-mimic
   assay with IC(50) in the range 8.67-41.45 mu M. The results of an in
   vivo antidiabetic activity assay were inconclusive and the glycaemia in
   pre-treated animals did not differ significantly from the positive
   control. (C) 2010 Elsevier Ltd. All rights reserved.,
DOI = 10.1016/j.poly.2010.06.007,
ISSN = 0277-5387,
Unique-ID = ISI:000282389900003,

M. Matikova-Malarova, R. Novotna, and Z. Travnicek, "X-ray structures and spectral characterization of simple ruthenium(II)
nitrosyl complexes involving the [RuCl(4)(NO)(DMS(O)under-bar)](-) or
[RuCl(4)(NO)(H(2)O)](-) complex anions," JOURNAL OF MOLECULAR STRUCTURE, vol. 977, iss. 1-3, pp. 203-209, 2010.
[Bibtex]

@article ISI:000280498600028,
Author = Matikova-Malarova, Miroslava and Novotna, Radka and Travnicek, Zdenek,
Title = X-ray structures and spectral characterization of simple ruthenium(II)
   nitrosyl complexes involving the [RuCl(4)(NO)(DMS(O)under-bar)](-) or
   [RuCl(4)(NO)(H(2)O)](-) complex anions,
Journal = JOURNAL OF MOLECULAR STRUCTURE,
Year = 2010,
Volume = 977,
Number = 1-3,
Pages = 203-209,
Month = AUG 10,
Abstract = Three simple ruthenium nitrosyl complexes of the compositions
   [Et(4)N][RuCl(4)(NO)(DMS (O) under bar)](-) (1),
   [Bu(4)N][RuCl(4)(NO)(DMS (O) under bar)](-) (2), and
   [Pli(4)PI[RuCl(4)(NO)(H(2)O]center dot DMSO (3); where DMSO =
   dimethyl sulfoxide, Et = ethyl, Bu = butyl and Ph = phenyl, have been
   synthesized in the single crystal form and their molecular and crystal
   structures have been determined. The Ru(II) centre is six-coordinated by
   four chlorido ligands in the equatorial plane and by the N (from NO(+))
   and O (from DMS (O) under bar in 1 and 2, H(2)O in 3) atoms in the axial
   positions forming an RuCI4NO donor set. The complexes have been also
   characterized by infrared and electronic spectroscopies, conductivity
   measurements, and thermogravimetric (TG) and differential thermal (DTA)
   analyses. The spectroscopic investigation is consistent with the
   (Ru(NO))(6) formulation with NO(+) coordinated to the diamagnetic Ru(II)
   centre. The geometries of the complex anions as well as spectroscopic
   properties were calculated at the B3LYP/LANL2DZ/cc-pVTZ level of theory.
   These results were compared with those experimentally determined. (C)
   2010 Elsevier B.V. All rights reserved.,
DOI = 10.1016/j.molstruc.2010.05.033,
ISSN = 0022-2860,
Unique-ID = ISI:000280498600028,

L. Dvorak, I. Popa, P. Starha, and Z. Travnicek, "In Vitro Cytotoxic-Active Platinum(II) Complexes Derived from
Carboplatin and Involving Purine Derivatives," EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, iss. 22, pp. 3441-3448, 2010.
[Bibtex]

@article ISI:000281061700006,
Author = Dvorak, Lukas and Popa, Igor and Starha, Pavel and Travnicek, Zdenek,
Title = In Vitro Cytotoxic-Active Platinum(II) Complexes Derived from
   Carboplatin and Involving Purine Derivatives,
Journal = EUROPEAN JOURNAL OF INORGANIC CHEMISTRY,
Year = 2010,
Number = 22,
Pages = 3441-3448,
Month = AUG,
Abstract = Six platinum(II) complexes of the general formula
   [Pt(cbdc)-(HL(n))(2)] (1-6; cbdc = cyclobutane-1,1-dicarboxylate and
   HL(1)-HL(6) = benzyl-substituted
   6-benzylamino-2-chloro-9-iso-propylpurine derivatives) have been
   synthesized by the reaction of [Pt(cbdc)(dmso)(2)] with the
   corresponding HL(n) compound. The prepared complexes were characterized
   by elemental analysis and FTIR, Raman and NMR ((1)H, (13)C, (15)N and
   (195)Pt) spectroscopy. Based on the results of these techniques, it can
   be concluded that the central Pt(II) atom of the complexes 1-6 is
   coordinated to two oxygen atoms originating from the
   cyclobutane-1,1-dicarboxylate group and to two nitrogen atoms from two
   HL(n) molecules, that is, having a PtN(2)O(2) donor set. Detailed
   multinuclear and two-dimensional NMR studies indicated the N-7 atom to
   be the coordination site of the purine derivatives. The coordination
   mode was proven by a single-crystal X-ray analysis of the
   [Pt(cbdc)(dmso)-(HL(7))]center dot H(2)O (7a center dot H(2)O)
   intermediate [HL(7) =
   2-chloro-6-(2-methoxybenzyl)amino-9-isopropylpurine]. The geometry is
   slightly distorted square-planar and the central Pt(II) atom is
   coordinated to one bidentate cyclobutane-1,1-dicarboxylate dianion, one
   dmso molecule through the sulfur atom and one HL7 molecule through the
   N-7 atom of the purine ring, that is, with a PtNO(2)S donor set. The
   complexes 1-6 were tested for their in vitro cytotoxicity against K-562
   (chronic myelogenous leukaemia) and MCF7 (breast adenocarcinoma) human
   cancer cell lines. Values of IC(50) (drug concentrations lethal for 50\%
   of the tumour cells) ranged from 4.5 to 14.1 mu m for the K-562 cells
   and from 4.3 to 21.0 mu m for the MCF7 cells. The in vitro
   cytotoxicities were in several cases comparable or even higher than
   those of therapeutically used platinum-based anticancer drugs, that is,
   cisplatin, carboplatin and oxaliplatin.,
DOI = 10.1002/ejic.201000322,
ISSN = 1434-1948,
Unique-ID = ISI:000281061700006,

R. Novotna, Z. Travnicek, and I. Popa, "Synthesis and characterization of the first zinc(II) complexes involving
kinetin and its derivatives: X-ray structures of
2-chloro-N6-furfuryl-9-isopropyladenine and
[Zn(kinetin)(2)Cl(2)]center dot CH(3)OH," INORGANICA CHIMICA ACTA, vol. 363, iss. 10, pp. 2071-2079, 2010.
[Bibtex]

@article ISI:000278592200003,
Author = Novotna, Radka and Travnicek, Zdenek and Popa, Igor,
Title = Synthesis and characterization of the first zinc(II) complexes involving
   kinetin and its derivatives: X-ray structures of
   2-chloro-N6-furfuryl-9-isopropyladenine and
   [Zn(kinetin)(2)Cl(2)]center dot CH(3)OH,
Journal = INORGANICA CHIMICA ACTA,
Year = 2010,
Volume = 363,
Number = 10,
Pages = 2071-2079,
Month = JUN 20,
Abstract = A series of the first zinc(II) complexes of the general composition
   [Zn(L(n))(2)Cl(2)]center dot xSolv (1-5) involving kinetin
   [N6-furfuryladenine, L(1), xSolv = CH(3)OH, complex 1] and its
   derivatives, i.e. N6-(5-methylfurfuryl)adenine (L(2), xSolv = 2H(2)O,
   2), 2-chloro-N6-furfuryladenine (L(3), 3),
   2-chloro-N6-(5-methylfurfuryl)adenine (L(4), 4) and
   2-chloro-N6-furfuryl-9-isopropyladenine (L(5), 5), as N-donor ligands
   has been synthesized. The complexes have been fully characterized by
   elemental analyses (C, H, N), FTIR, Raman, (1)H and (13)C NMR
   spectroscopy, conductivity measurements, thermogravimetric (TG) and
   differential thermal (DTA) analyses. Single crystal X-ray analysis
   determined the molecular structures of
   2-chloro-N6-furfuryl-9-isopropyladenine (L(5)) and the complex
   [Zn(L(1))(2)Cl(2)]center dot CH(3)OH. The Zn(II) ion is tetrahedrally
   coordinated by two chlorido ligands and two molecules of the L(1)
   organic compound. The two ligands L(1) are coordinated to the central
   Zn(II) ion via the N7 atoms. This conclusion can also be drawn from
   multinuclear NMR spectroscopic experiments. (C) 2010 Elsevier B.V. All
   rights reserved.,
DOI = 10.1016/j.ica.2010.02.004,
ISSN = 0020-1693,
Unique-ID = ISI:000278592200003,

I. Potocnak, Z. Pravcova, and Z. Travnicek, "Bis(4,7-dichloro-1,10-phenanthroline-kappa(2)N,N `)bis(dicyanamido-kappa
N)copper(II)," ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE, vol. 66, iss. Part 6, pp. M719-U1181, 2010.
[Bibtex]

@article ISI:000278263300088,
Author = Potocnak, Ivan and Pravcova, Zuzana and Travnicek, Zdenek,
Title = Bis(4,7-dichloro-1,10-phenanthroline-kappa(2)N,N `)bis(dicyanamido-kappa
   N)copper(II),
Journal = ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE,
Year = 2010,
Volume = 66,
Number = Part 6,
Pages = M719-U1181,
Month = JUN,
Abstract = In the title compound, [Cu(C(2)N(3))(2)(C(12)H(6)Cl(2)N(2))(2)], the
   Cu(II) atom is coordinated by two chelating
   4,7-dichloro-1,10-phenanthroline (4,7-Cl-phen) ligands and two
   dicyanamide (dca) ligands in a cis arrangement, forming a distorted
   octahedral geometry. The equatorial plane is occupied by three N atoms
   from two 4,7-Cl-phen ligands and one N atom from a dca ligand at shorter
   Cu-N distances. Due to the Jahn-Teller effect, the axial positions are
   occupied by a 4,7-Cl-phen N atom and a dca N atom at longer Cu-N
   distances. The dca ligands are nearly planar, with a maximum deviations
   of 0.006 (1) angstrom. The crystal structure is stabilized by weak C-H
   center dot center dot center dot N hydrogen bonds, with cyanide N atoms
   as acceptors, and pi-pi interactions between adjacent phenyl rings
   [centroid-centroid distance = 3.725 (3) angstrom].,
DOI = 10.1107/S1600536810019847,
ISSN = 1600-5368,
Unique-ID = ISI:000278263300088,

S. Cermakova, R. Herchel, Z. Travnicek, and M. Sebela, "Syntheses and magnetic properties of trinuclear trithiocyanurato-bridged
manganese(II) complexes involving bidentate aromatic N-donor
heterocycles," INORGANIC CHEMISTRY COMMUNICATIONS, vol. 13, iss. 6, pp. 778-781, 2010.
[Bibtex]

@article ISI:000279136700023,
Author = Cermakova, Sarka and Herchel, Radovan and Travnicek, Zdenek and Sebela,
   Marek,
Title = Syntheses and magnetic properties of trinuclear trithiocyanurato-bridged
   manganese(II) complexes involving bidentate aromatic N-donor
   heterocycles,
Journal = INORGANIC CHEMISTRY COMMUNICATIONS,
Year = 2010,
Volume = 13,
Number = 6,
Pages = 778-781,
Month = JUN,
Abstract = Trinuclear manganese(II) complexes of the compositions
   [Mn(3)(phen)(6)(ttc)](ClO(4))(3) (1), [Mn(3)(dmbpy)(6)(ttc)]
   (ClO(4))(3)center dot 2H(2)O (2) and
   [Mn(3)(bpy)(6)(ttc)](ClO(4))(3)center dot 3H(2)O (3), where phen =
   1,10-phenanthroline, dmbpy = 4,4'-dimethyl-2,2'-bipyridine, bpy =
   2,2'-bipyridine and H(3)ttc = trithiocyanuric acid
   (2,4,6-trimercapto-1,3,5-triazine), were prepared and characterized by
   elemental analysis. FTIR and Raman spectroscopies, MALDI-TOF mass
   spectrometry, magnetic and conductivity measurements. The magnetic
   analysis incorporating simultaneous fitting of the temperature
   dependence and the field dependence of the magnetization using the
   isosceles triangle spin Hamiltonian model revealed a weak
   antiferromagnetic exchange within the trinuclear units. (C) 2010
   Elsevier B.V. All rights reserved.,
DOI = 10.1016/j.inoche.2010.03.045,
ISSN = 1387-7003,
Unique-ID = ISI:000279136700023,

P. Starha, R. Novotna, and Z. Travnicek, "X-ray structure and properties of a dinuclear palladium(II) complex
[Pd(2)(mu-L)(4)] with four adenine-based bridges in a paddle
wheel-like arrangement," INORGANIC CHEMISTRY COMMUNICATIONS, vol. 13, iss. 6, pp. 800-803, 2010.
[Bibtex]

@article ISI:000279136700029,
Author = Starha, Pavel and Novotna, Radka and Travnicek, Zdenek,
Title = X-ray structure and properties of a dinuclear palladium(II) complex
   [Pd(2)(mu-L)(4)] with four adenine-based bridges in a paddle
   wheel-like arrangement,
Journal = INORGANIC CHEMISTRY COMMUNICATIONS,
Year = 2010,
Volume = 13,
Number = 6,
Pages = 800-803,
Month = JUN,
Abstract = A unique dinuclear palladium(II) complex of the general composition
   [Pd(2)(mu-L)(4)]center dot xDMF (DMF = N,N'-dimethylformamide, x=2 for
   la, x = 4 for 1b) was prepared by a reaction of K(2)[Pd(mal)(2)] and
   two molar equivalents of 2-chloro-N6-benzyl-9-isopropyladenine (HL); mal
   stands for the malonate dianion. The prepared complex was fully
   characterized by elemental analysis, molar conductivity measurements,
   IR. Raman and NMR spectroscopies, ESI + mass spectrometry, TG/DTA
   thermal studies (for la), and by a single crystal X-ray analysis (for
   1b). The results revealed that both metal centres are bridged by four
   N6-deprotonated2-chloro-N6-benzyl-9-isopropyladenine molecules (L) in a
   paddle wheel-like arrangement with the Pd1 ... Pd1A separation of
   2.7532(4) angstrom. Each of the L molecules is coordinated to the Pd(II)
   ions through its N6 and N7 atoms. The geometry around each of the
   central atoms can be described as distorted square-planar formed by two
   N6 and two N7 atoms. The [Pd(2)(mu-L)(4)]center dot xDMF complex
   represents the first dinuclear transition metal complex with two central
   ions bridged by four adenine derivatives coordinated through their N6
   and N7 atoms. (C) 2010 Elsevier By. All rights reserved.,
DOI = 10.1016/j.inoche.2010.04.001,
ISSN = 1387-7003,
Unique-ID = ISI:000279136700029,

P. Starha, Z. Travnicek, and I. Popa, "Platinum(II) oxalato complexes with adenine-based carrier ligands
showing significant in vitro antitumor activity," JOURNAL OF INORGANIC BIOCHEMISTRY, vol. 104, iss. 6, pp. 639-647, 2010.
[Bibtex]

@article ISI:000277946300004,
Author = Starha, Pavel and Travnicek, Zdenek and Popa, Igor,
Title = Platinum(II) oxalato complexes with adenine-based carrier ligands
   showing significant in vitro antitumor activity,
Journal = JOURNAL OF INORGANIC BIOCHEMISTRY,
Year = 2010,
Volume = 104,
Number = 6,
Pages = 639-647,
Month = JUN,
Abstract = [Pt(L)(2)(ox)] (1), [Pt(2-OMeL)(2)(ox)] (2), [Pt(3-OMeL)(2)(ox)]
   (3), [Pt(2,3-diOMeL)(2)(ox)] (4), [Pt(2,4-diOMeL)(2)(ox)] (5),
   [Pt(3,4-diOMeL)(2)(ox)] (6) and [Pt(3,5-diOMeL)(2)(ox)]center dot
   4H(2)O (7) platinum(II) oxalato (ox) complexes were synthesized using
   the reaction of potassium bis(oxalato)platinate(II) dihydrate with
   2-chloro-N6-(benzyl)-9-isopropyladenine or its benzyl-substituted
   analogues (nL). The complexes 1-7, which represent the first
   platinum(II) oxalato complexes involving adenine-based ligands, were
   fully characterized by various physical methods including multinuclear
   and two dimensional NMR spectroscopy. A single-crystal X-ray analysis of
   [Pt(2,4-diOMeL)(2)(ox)]center dot 2DMF (5 center dot 2DMF;
   DMF=N,N'-dimethylformamide), proved the slightly distorted square-planar
   geometry in the vicinity of the Pt(II) ion with one
   bidentate-coordinated oxalate dianion and two adenine derivatives (nL)
   coordinated to the Pt(II) centre through the N7 atom of an adenine
   moiety, thereby giving a PtN(2)O(2) donor set. In vitro cytotoxicity of
   the prepared complexes was tested by an MTT assay against osteosarcoma
   (HOS) and breast adenocarcinoma (MCF7) human cancer cell lines. The best
   results were achieved for the complexes 2 and 5 in the case of both cell
   lines, whose IC(50) values equalled 3.6 +/- 1.0, and 4.3 +/- 2.1 mu M
   (for 2), and 5.4 +/- 3.8, and 3.6 +/- 2.1 mu M (for 5), respectively.
   The IC(50) equals 9.2 +/- 1.5 mu M against MCF7 cells in the case of 1.
   The in vitro cytotoxicity of the mentioned complexes significantly
   exceeded commercially used platinum-based anticancer drugs cisplatin
   (34.2 +/- 6.4 mu M and 19.6 +/- 4.3 mu M) and oxaliplatin (>50.0 mu M
   for both cancer cell lines). (C) 2010 Elsevier Inc. All rights reserved.,
DOI = 10.1016/j.jinorgbio.2010.02.005,
ISSN = 0162-0134,
Unique-ID = ISI:000277946300004,

Z. Travnicek, R. Herchel, J. Mikulik, and R. Zboril, "Copper(II) cyanido-bridged bimetallic nitroprusside-based complexes:
Syntheses, X-ray structures, magnetic properties, (57)Fe Mossbauer
spectroscopy and thermal studies," JOURNAL OF SOLID STATE CHEMISTRY, vol. 183, iss. 5, pp. 1046-1054, 2010.
[Bibtex]

@article ISI:000277675500009,
Author = Travnicek, Zdenek and Herchel, Radovan and Mikulik, Jiri and Zboril,
   Radek,
Title = Copper(II) cyanido-bridged bimetallic nitroprusside-based complexes:
   Syntheses, X-ray structures, magnetic properties, (57)Fe Mossbauer
   spectroscopy and thermal studies,
Journal = JOURNAL OF SOLID STATE CHEMISTRY,
Year = 2010,
Volume = 183,
Number = 5,
Pages = 1046-1054,
Month = MAY,
Abstract = Three heterobimetallic cyanido-bridged copper(II) nitroprusside-based
   complexes of the compositions [Cu(tet)Fe(CN)(5)O]center dot H(2)O (1),
   where tet=N,N'-bis(3-aminopropyl)ethylenediamine,
   [Cu(hto)Fe(CN)(5)NO]center dot 2H(2)O (2), where
   hto=1,3,6,9,11,14-hexaazatricyclo[12.2.1.1(69)]octadecane and
   [Cu(hto)(2)Fe(CN)(5)NO]center dot H(2)O (3), where
   nme=N-methylethylenediamine, were synthesized and characterized by
   elemental analyses, (57)Fe Mossbauer and FTI spectroscopies, thermal
   analysis, magnetic measurements and single-crystal X-ray analysis. The
   products of thermal degradation processes of 2 and 3 were studied by
   XRD, (57)Fe Mossbauer spectroscopy, SEM and EDS, and they were
   identified as mixtures of CuFe(2)O(4) and CuO. (C) 2010 Elsevier Inc.
   All rights reserved.,
DOI = 10.1016/j.jssc.2010.03.001,
ISSN = 0022-4596,
Unique-ID = ISI:000277675500009,

P. Starha, I. Popa, and Z. Travnicek, "Palladium(II) oxalato complexes involving
N6-(benzyl)-9-isopropyladenine-based N-donor carrier ligands: Synthesis,
general properties, (1)H, (13)C and (15)N\(1)H\ NMR characterization
and in vitro cytotoxicity," INORGANICA CHIMICA ACTA, vol. 363, iss. 7, pp. 1469-1478, 2010.
[Bibtex]

@article ISI:000276190300021,
Author = Starha, Pavel and Popa, Igor and Travnicek, Zdenek,
Title = Palladium(II) oxalato complexes involving
   N6-(benzyl)-9-isopropyladenine-based N-donor carrier ligands: Synthesis,
   general properties, (1)H, (13)C and (15)N\(1)H\ NMR characterization
   and in vitro cytotoxicity,
Journal = INORGANICA CHIMICA ACTA,
Year = 2010,
Volume = 363,
Number = 7,
Pages = 1469-1478,
Month = APR 20,
Abstract = Reactions of potassium bis(oxalato)palladate dihydrate,
   K(2)[Pd(ox)(2)]center dot 2H(2)O, with two molar equivalents of
   N6-(benzyl)-9-isopropyladenine-based organic molecules (L(1-7)), i.e.
   2-chloro-N6-(2-methoxybenzyl)-9-isopropyladenine (L(1)),
   2-chloro-N6-(3-methoxybenzyl)-9-isopropyladenine (L(2)),
   2-chloro-N6-(3,5-dimethoxybenzyl)-9-isopropyladenine (L(3)),
   2-(1-ethyl-2-hydroxyethylamino)-N6-(benzyl)-9-isopropyladenine (L(4)),
   2-(1-ethyl-2-hydroxyethylamino)-N6-(2-methoxybenzyl)-9-isopropyladenine
   (L(5)),
   2-(1-ethyl-2-hydroxyethylamino)-N6-(3-methoxybenzyl)-9-isopropyladenine
   (L(6)) and
   2-(1-ethyl-2-hydroxyethylamino)-N6-(4-methoxybenzyl)-9-isopropyladenine
   (L(7)), provided a series of seven palladium(II) oxalato (ox) complexes
   of the general formula [Pd(ox)(L(1-7))(2)]center dot nH(2)O (1-7; n =
   0 for 4, 5 and 7, (3)/(4) for 1 and 2, 1 for 6, and 3 for 3). The
   compounds were characterized by elemental analysis, IR, Raman, (1)H,
   (13)C and (15)N\(1)H\ NMR spectroscopy, ESI+ mass spectrometry, molar
   conductivity and TG/DTA thermal analysis. The geometry of
   [Pd(ox)(L(2))(2)] (2) was optimized on the B3LYP/6-311G*/LANL2DZ
   level of theory. The complexes 4-7 represent the first palladium(II)
   oxalato complexes with a PdN(2)O(2) donor set, which involve highly
   potent purine-based cyclin-dependent kinase (CDK) inhibitors (L(4-7)) as
   carrier N-donor ligands. The selected complexes 1, 3-5 and 7 were tested
   by an MTT assay for their in vitro cytotoxic activity against human
   osteosarcoma (HOS) cancer cell line. The highest activity was found for
   the complexes 5 (IC(50) = 34.9 mu M) and 7 (IC(50) = 39.2 mu M). (C)
   2010 Elsevier B.V. All rights reserved.,
DOI = 10.1016/j.ica.2010.01.035,
ISSN = 0020-1693,
Unique-ID = ISI:000276190300021,

Z. Travnicek and M. Matikova-Malarova, "Poly[di-mu(2)-chlorido-dichlorido(mu(3)-dimethyl
sulfoxide-kappa(3)O:O:S)(mu(2)-dimethyl
sulfoxide-kappa(2)O:S)ruthenium(III)sodium]," ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE, vol. 66, iss. Part 4, pp. M348-U160, 2010.
[Bibtex]

@article ISI:000276190700005,
Author = Travnicek, Zdenek and Matikova-Malarova, Miroslava,
Title = Poly[di-mu(2)-chlorido-dichlorido(mu(3)-dimethyl
   sulfoxide-kappa(3)O:O:S)(mu(2)-dimethyl
   sulfoxide-kappa(2)O:S)ruthenium(III)sodium],
Journal = ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE,
Year = 2010,
Volume = 66,
Number = Part 4,
Pages = M348-U160,
Month = APR,
Abstract = The structure of the title compound, [NaRuCl(4)(C(2)H(6)OS)(2)](n),
   comprises centrosymmetric [RuCl(2)(DMSO)Na(DMSO)Cl(2)-Ru] units (DMSO
   is dimethyl sulfoxide, C(2)H(6)OS), with two Ru atoms, each lying on a
   crystallographic centre of inversion, connected via Na atoms, DMSO and
   chloride ligands into a two-dimensional (110)array. Both Ru III atoms
   are octahedrally coordinated by four chloride ligands in the equatorial
   plane and by two DMSO molecules in apical positions within a RuCl(4)S(2)
   donor set. The Na atom is surrounded by three chloride anions and three
   O atoms derived from three DMSO molecules, with the resulting Cl(3)O(3)
   donor set defining an octahedron. The crystal structure is further
   stabilized by interatomic interactions of the types C center dot center
   dot center dot Cl [C-Cl = 3.284 (2)angstrom], C-H center dot center
   dot center dot Cl [C center dot center dot center dot Cl = 3.903
   (3)angstrom]and C-H center dot center dot center dot O [C center dot
   center dot center dot O = 3.376 (3)angstrom],
DOI = 10.1107/S1600536810007063,
ISSN = 1600-5368,
Unique-ID = ISI:000276190700005,

Z. Travnicek, I. Popa, M. Cajan, R. Zboril, V. Krystof, and J. Mikulik, "The first iron(III) complexes with cyclin-dependent kinase inhibitors:
Magnetic, spectroscopic (IR, ES+ MS, NMR, (57)Fe Mossbauer),
theoretical, and biological activity studies," JOURNAL OF INORGANIC BIOCHEMISTRY, vol. 104, iss. 4, pp. 405-417, 2010.
[Bibtex]

@article ISI:000274921200007,
Author = Travnicek, Zdenek and Popa, Igor and Cajan, Michal and Zboril, Radek and
   Krystof, Vladimir and Mikulik, Jiri,
Title = The first iron(III) complexes with cyclin-dependent kinase inhibitors:
   Magnetic, spectroscopic (IR, ES+ MS, NMR, (57)Fe Mossbauer),
   theoretical, and biological activity studies,
Journal = JOURNAL OF INORGANIC BIOCHEMISTRY,
Year = 2010,
Volume = 104,
Number = 4,
Pages = 405-417,
Month = APR,
Abstract = The first Fe(III) complexes 1-6 with cyclin-dependent kinase (CDK)
   inhibitors of the type [Fe(L(n))Cl(3)]center dot nH(2)O (n = 0 for 1,
   1 for 2, 2 for 3-6; L(1)-L(6) = C2- and phenyl-substituted CDK
   inhibitors derived from 6-benzyl-amino-9-isopropylpurine), have been
   synthesized and characterized by elemental analysis, IR, (57)Fe
   Mossbauer, (1)H and (13)C NMR, and ES+ mass spectroscopies, conductivity
   and magnetic susceptibility measurements, and thermogravimetric analysis
   (TGA) and differential scanning calorimetry (DSC). The study revealed
   that the compounds are mononuclear, tetrahedral high-spin (S = 5/2)
   Fe(III) complexes with an admixture of an S = 3/2 spin state originating
   probably from five-coordinated Fe(III) ions either connecting with a
   bidentate coordination mode of the CDK inhibitor ligand or relating to
   the possibility that one crystal water molecule enters the coordination
   sphere of the central atom in a portion of molecules of the appropriate
   complex. Nearly spin-only value of the effective magnetic moment (5.82
   mu(eff)/mu(B)) was determined for compound 1 due to absence of crystal
   water molecule(s) in the structure of the complex. Based on NMR data and
   DFT calculations, we assume that the appropriate organic ligand is
   coordinated to the Fe(III) ion through the N7 atom of a purine moiety.
   The cytotoxicity of the complexes was tested in vitro against selected
   human cancer cell lines (G-361, HOS, K-562 and MCF-7) along with the
   ability to inhibit the CDK2/cyclinE kinase. The best cytotoxicity
   (IC(50): 4-23 mu M) and inhibition activity (IC(50): 0.02-0.09 mu M)
   results have been achieved in the case of complexes 2-4, and complexes
   3,4 and 6, respectively. In addition, the X-ray structure of
   2-chloro-6-benzylamino-9-isopropylpurine, i.e. a precursor for the
   preparation of L(1), L(4) and L(5), is also described. (C) 2009 Elsevier
   Inc. All rights reserved.,
DOI = 10.1016/j.jinorgbio.2009.12.002,
ISSN = 0162-0134,
Unique-ID = ISI:000274921200007,

Z. Dvorak, R. Vrzal, P. Starha, A. Klanicova, and Z. Travnicek, "Effects of dinuclear copper(II) complexes with 6-(benzylamino)purine
derivatives on AhR and PXR dependent expression of cytochromes P450
CYP1A2 and CYP3A4 genes in primary cultures of human hepatocytes," TOXICOLOGY IN VITRO, vol. 24, iss. 2, pp. 425-429, 2010.
[Bibtex]

@article ISI:000275991700011,
Author = Dvorak, Zdenek and Vrzal, Radim and Starha, Pavel and Klanicova, Alena
   and Travnicek, Zdenek,
Title = Effects of dinuclear copper(II) complexes with 6-(benzylamino)purine
   derivatives on AhR and PXR dependent expression of cytochromes P450
   CYP1A2 and CYP3A4 genes in primary cultures of human hepatocytes,
Journal = TOXICOLOGY IN VITRO,
Year = 2010,
Volume = 24,
Number = 2,
Pages = 425-429,
Month = MAR,
Abstract = A series of dinuclear copper(II) complexes of the compositions
   [Cu(2)(mu-L(n))(2)(mu-Cl)(2)Cl(2)] (1, 2),
   [Cu(2)(mu-L(n))(4)Cl(2)]Cl(2)center dot 2H(2)O (3, 4) and
   [Cu(2)(mu-L(n))(4)(ClO(4))(2)](ClO(4))(2)center dot xSolv (5, 6; xSolv
   = 4MeOH for 5 and 2EtOH for 6), involving 6-(benzylamino)purine
   derivatives (L(n)), have been evaluated with the aim to determine their
   possible drug interactions and their capability to induce the expression
   of major drug-metabolizing cytochromes P450. The above-mentioned
   complexes have been chosen based on the fact that substantial both in
   vitro (cytotoxicity, SOD-mimic) and in vivo (antidiabetic) biological
   activity has been found for them. As models, primary cultures of human
   hepatocytes and human hepatoma cells HepG2 transiently transfected with
   a plasmid containing dioxin-responsive element fused to the luciferase
   reporter gene (DRE-LUC) have been chosen. It has been found that the
   tested complexes 1-6 did not significantly induce the expression of
   CYP1A2 and CYP3A4 mRNAs in the concentration range of 0.1-10.0 mu M, in
   three different primary human hepatocyte cultures after 24 h of the
   treatment. On the other hand, the model inducers, i.e. 2,3,7,8-
   tetrachlorodibenzo-p-dioxin (TCDD) and rifampicin, significantly
   increased the levels of CYP1A2 and CYP3A4 mRNAs in all cultures. In
   addition, compounds 1-6 did not transactivate DRE-LUC in transiently
   transfected HepG2, while TCDD strongly induced luciferase activity after
   24 h of incubation. Based on the obtained results, it may be concluded
   that the studied dinuclear copper(II) complexes 1-6 possess very low
   toxicological potential to cause drug interactions in terms of
   transcriptional activation of the major human cytochromes P450. (C) 2009
   Elsevier Ltd. All rights reserved.,
DOI = 10.1016/j.tiv.2009.10.012,
ISSN = 0887-2333,
Unique-ID = ISI:000275991700011,

R. Novotna, Z. Travnicek, and I. Popa, "X-ray crystallographic and NMR study of the tautomerism in kinetin,
kinetin riboside and their derivatives: A comparison between the solid
state and solution," JOURNAL OF MOLECULAR STRUCTURE, vol. 963, iss. 2-3, pp. 202-210, 2010.
[Bibtex]

@article ISI:000274867800017,
Author = Novotna, Radka and Travnicek, Zdenek and Popa, Igor,
Title = X-ray crystallographic and NMR study of the tautomerism in kinetin,
   kinetin riboside and their derivatives: A comparison between the solid
   state and solution,
Journal = JOURNAL OF MOLECULAR STRUCTURE,
Year = 2010,
Volume = 963,
Number = 2-3,
Pages = 202-210,
Month = JAN 29,
Abstract = N6-furfuryladenine (kinetin, 1), 2-chloro-N6-furfuryladenine (2),
   N6-furfuryladenosine (kinetin riboside, 3) and
   2-chloro-N6-(5-methylfurfuryl)adenosine (4) have been prepared and their
   structural properties have been studied using a single crystal X-ray
   analysis (2, 4) and multinuclear 1D and 2D NMR spectroscopy (1-4). The
   molecular structure of 2 revealed the presence of the 3H-amino and
   7H-amino tautomeric forms with the occupancy of 82(3)\%, and 18(3)\%,
   respectively, for the corresponding hydrogen. The NMR study revealed the
   presence of tautomeric equilibria in 1, 2 and 4 in dimethyl sulfoxide or
   N,N'-dimethylformamide solutions at 300 K and 340 K. It has been found
   that the 9H-amino/7H-amino, 1H,7H-imino/1H,9H-imino and
   9H-amino/7H-amino, and amino/1H-imino equilibria exist in 1, 2, and 4,
   respectively. The presence of a tautomeric equilibrium has not been
   observed in the case of 3. (c) 2009 Elsevier B.V. All rights reserved.,
DOI = 10.1016/j.molstruc.2009.10.036,
ISSN = 0022-2860,
Unique-ID = ISI:000274867800017,

J. Cernak, J. Hanikova, J. Kuchar, E. Cizmar, and Z. Travnicek, "[Cu(men)(2)(BF(4))(2)] (men = N-methyl-1,2-diaminoethane):
Preparation, crystal structure, spectroscopic and magnetic properties," JOURNAL OF MOLECULAR STRUCTURE, vol. 963, iss. 1, pp. 71-75, 2010.
[Bibtex]

@article ISI:000273901300012,
Author = Cernak, J. and Hanikova, J. and Kuchar, J. and Cizmar, E. and Travnicek,
   Z.,
Title = [Cu(men)(2)(BF(4))(2)] (men = N-methyl-1,2-diaminoethane):
   Preparation, crystal structure, spectroscopic and magnetic properties,
Journal = JOURNAL OF MOLECULAR STRUCTURE,
Year = 2010,
Volume = 963,
Number = 1,
Pages = 71-75,
Month = JAN 15,
Abstract = Single crystals of [Cu(men)(2)(BF(4))(2)] (men =
   N-methyl-1,2-diaminoethane) (1) were isolated from an aqueous-ethanolic
   system Cu(2+)-men-BF(4)(-). The crystal structure of 1 consists of
   [Cu(men)(2)(BF(4))(2)] molecules. Copper ion exhibits usual distorted
   octahedral coordination; there are two coordinated men ligands in the
   equatorial plane with Cu-N bonds of 2.0451(12) and 2.0035(12) angstrom,
   while the axial positions are occupied by fluorine atoms from BF(4)(-)
   anions with Cu-F bond of 2.5091(11) angstrom. The packing of the
   [Cu(men)(2)(BF(4))(2)] molecules is governed by N-H center dot center
   dot center dot F type hydrogen bonds. The measured ESR spectrum
   corroborated the presence of Jahn-Teller anisotropy of Cu(II) with
   g(parallel to) = 2.20 and g(perpendicular to) = 2.06. The magnetic
   studies in the temperature range 300-2 K reveal that 1 follows the
   Curie-Weiss law with parameters g = 2.1612(1) and 0 = -0.233(1) K
   suggesting the presence of weak antiferomagnetic interactions. (C) 2009
   Elsevier B.V. All rights reserved.,
DOI = 10.1016/j.molstruc.2009.10.016,
ISSN = 0022-2860,
Unique-ID = ISI:000273901300012,

Z. Travnicek, R. Pastorek, P. Starha, I. Popa, and V. Slovak, "Nickel(II) N-Benzyl-N-methyldithiocarbamato Complexes as Precursors for
the Preparation of Graphite Oxidation Accelerators," ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, vol. 636, iss. 8, pp. 1557-1564, 2010.
[Bibtex]

@article ISI:000280659500023,
Author = Travnicek, Zdenek and Pastorek, Richard and Starha, Pavel and Popa, Igor
   and Slovak, Vaclav,
Title = Nickel(II) N-Benzyl-N-methyldithiocarbamato Complexes as Precursors for
   the Preparation of Graphite Oxidation Accelerators,
Journal = ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE,
Year = 2010,
Volume = 636,
Number = 8,
Pages = 1557-1564,
Abstract = The nickel(II) N-benzyl-N-methyldithiocarbantato (BzMedtc) complexes
   [Ni(BzMedtc)(PPh(3))Cl] (1), [Ni(BzMedtc)(PPh(3))Br] (2),
   [Ni(BzMedtc)(PPh(3))I] (3), and [Ni(BzMedtc)(PPh(3))(NCS)] (4) were
   synthesized using the reaction of [Ni(BzMedtc)(2)] and
   [NiX(2)(PPh(3))(2)] (X = Cl, Br, I and NCS). Subsequently, complex 1
   was used for the preparation of [Ni(BzMedtc)(PPh(3))(2)]ClO(4) (5),
   [Ni(BzMedtc)(PPh(3))(2)]BPh(4) (6), and
   [Ni(BzMedtc)(PPh(3))(2)]PF(6) (7). The obtained complexes 1-7 were
   characterized by elemental analysis, thermal analysis and spectroscopic
   methods (IR, UV/Vis, (31)P\(1)H\ NMR). The results of the
   magnetochemical and molar conductivity measurements proved the complexes
   as diamagnetic non-electrolytes (1-4) or 1:1 electrolytes (5-7). The
   molecular structures of 4 and 5 center dot H(2)O were determined by a
   single-crystal X-ray analysis. In all cases, the Ni(II) atom is
   tetracoordinated in a distorted square-planar arrangement with the
   S(2)PX, and S(2)P(2) donor set, respectively. The catalytic influence of
   selected complexes 1, 3, 5, and 6 on graphite oxidation was studied. The
   results clearly indicated that the presence of the products of thermal
   degradation processes of the mentioned complexes has impact on the
   course of graphite oxidation. A decrease in the oxidation start
   temperatures by about 60-100 degrees C was observed in the cases of all
   the tested complexes in comparison with pure graphite.,
DOI = 10.1002/zaac.201000091,
ISSN = 0044-2313,
Unique-ID = ISI:000280659500023,

2009

Z. Travnicek and J. Marek, "X-ray structural characterizations of the reaction products between
ZnCl(2) and 6-benzylaminopurine derivatives in different acidic
conditions," JOURNAL OF MOLECULAR STRUCTURE, vol. 933, iss. 1-3, pp. 148-155, 2009.
[Bibtex]

@article ISI:000269472400021,
Author = Travnicek, Zdenek and Marek, Jaromir,
Title = X-ray structural characterizations of the reaction products between
   ZnCl(2) and 6-benzylaminopurine derivatives in different acidic
   conditions,
Journal = JOURNAL OF MOLECULAR STRUCTURE,
Year = 2009,
Volume = 933,
Number = 1-3,
Pages = 148-155,
Month = SEP 17,
Abstract = The reaction between ZnCl(2) and the corresponding 6-benzylaminopurine
   derivative, L(n), [where L(1) = 6-(4-fluorobenzylamino)purine, L(2) =
   6-(2-fluorobenzylamino)purine or L(3) = 6-(4-chlorobenzylamino)purine]
   in 0.1 M or 2 M HCl afforded various products in dependence on a pH of
   the reaction medium. X-ray structures of the reaction products have been
   determined by a single crystal X-ray analysis. It has been found that
   the reaction led to the formation of [Zn(HL(1))Cl(3)]center dot H(2)O
   (1) in 0.1 M HCl in which the L(1) ligand acts as the single N1-H
   protonated N9-H tautomer and is coordinated to Zn through N7 atom of a
   purine skeleton. On the other hand, ion-paired compounds of the
   composition (H(2)L(2))[ZnCl(4)]center dot H(2)O (2) and
   (H(2)L(3))[ZnCl(4)] (3) have been formed during the reactions in 2 M
   HCl. Each of the organic molecules L(2) and L3 is twice protonated and
   its positive charge is compensated by the presence of the
   [ZnCl(4)](2-) anion. The cation exists as the N1-H, N7-H protonated
   N9-H tautomer in (2), and as the N3-H, N7-H protonated N9-H one in (3).
   It has been found that the extent of protonation has a significant
   impact on the coordination ability of the discussed organic molecules,
   and as a result of this finding, also on selected interatomic parameters
   as well as non-bonding interactions present in their crystal structures.
   Moreover, the compounds have been characterized by elemental analyses
   (C, H, N), FTIR and Raman spectroscopies, and thermogravimetric (TG) and
   differential thermal (DTA) analyses. (C) 2009 Elsevier B.V. All rights
   reserved.,
DOI = 10.1016/j.molstruc.2009.06.011,
ISSN = 0022-2860,
Unique-ID = ISI:000269472400021,

I. Nemec, R. Boca, R. Herchel, Z. Travnicek, M. Gembicky, and W. Linert, "Dinuclear Fe(III) complexes with spin crossover," MONATSHEFTE FUR CHEMIE, vol. 140, iss. 7, pp. 815-828, 2009.
[Bibtex]

@article ISI:000266926500011,
Author = Nemec, Ivan and Boca, Roman and Herchel, Radovan and Travnicek, Zdenek
   and Gembicky, Milan and Linert, Wolfgang,
Title = Dinuclear Fe(III) complexes with spin crossover,
Journal = MONATSHEFTE FUR CHEMIE,
Year = 2009,
Volume = 140,
Number = 7,
Pages = 815-828,
Month = JUL,
Abstract = A series of dinuclear Fe(III) complexes was synthesized in which the
   Schiff-base blocking ligand L(5) coordinates each of the centers which
   are linked by a bidentate, bipyridine-type ligand. For these systems,
   [L(5)Fe(III)\bridge\ Fe(III)L(5)](BPh(4))(2), thermally induced spin
   crossover is observed. The corollary of the systems is that the spin
   crossover interferes with the magnetic exchange interaction. The overlap
   of the energy bands of the LL and HH reference states (L, low-spin; H,
   high-spin) causes the exchange interaction to act against the spin
   crossover (leading to incompleteness or gradual behavior).,
DOI = 10.1007/s00706-008-0096-0,
ISSN = 0026-9247,
Unique-ID = ISI:000266926500011,

P. Starha, Z. Travnicek, and I. Popa, "Synthesis, characterization and in vitro cytotoxicity of the first
palladium(II) oxalato complexes involving adenine-based ligands," JOURNAL OF INORGANIC BIOCHEMISTRY, vol. 103, iss. 7, pp. 978-988, 2009.
[Bibtex]

@article ISI:000267768200006,
Author = Starha, Pavel and Travnicek, Zdenek and Popa, Igor,
Title = Synthesis, characterization and in vitro cytotoxicity of the first
   palladium(II) oxalato complexes involving adenine-based ligands,
Journal = JOURNAL OF INORGANIC BIOCHEMISTRY,
Year = 2009,
Volume = 103,
Number = 7,
Pages = 978-988,
Month = JUL,
Abstract = The first [Pd(L(n))(2)(ox)] xH(2)O oxalato(ox) complexes involving
   2-chloro-N6-(benzyl)-9-isopropyladenine (L(1): complex 1),
   2-chloro-N6-(4-methoxybenzyl)-9-isopropyladenine (L(2); 2),
   2-chloro-N6-(2,3-dimethoxybenzyl)-9-isopropyladenine (L(3); 3),
   2-chloro-N6-(2,4-dimethoxybenzyl)-9-isopropyladenine (L(4); 4), and
   2-chloro-N6-(4-methylbenzyl)-9-isopropyladenine (L(5); 5) have been
   synthesized by the reactions of potassium bis(oxalato)palladate(II)
   dihydrate, [K(2)Pd(ox)(2)]center dot 2H(2)O, with the mentioned
   organic compounds (H(2)ox = oxalic acid; x = 0 for 1-3 and 5 or 2 for
   4). Elemental analyses (C, H, N), FTIR, Raman and NMR ((1)H, (13)C,
   (15)N) spectroscopies, conductivity measurements and thermal studies
   (thermogravimetric and differential thermal analyses, TG/DTA) have been
   used to characterize the prepared complexes. The molecular structures of
   [Pd(L(2))(2)(ox)] (2) and [Pd(L(5))(2)(ox)]center dot L(5)center dot
   Me(2)CO (5 center dot L(5)center dot Me(2)CO) have been determined by a
   single crystal X-ray analysis. The geometry of these complexes is
   slightly distorted square-planar with two appropriate L(n) (n = 2 or 5)
   molecules mutually arranged in the head-to-head (2) or head-to-tail (5)
   orientation. The L(n) ligands are coordinated to the central Pd(II) ion
   via the N7 atoms. The same conclusions regarding the binding properties
   of L(1)-L(5) ligands can be made based on multinuclear NMR spectra. In
   vitro cytotoxicity of the complexes 1-5 has been evaluated against human
   chronic myelogenous leukaemia (K562) and human breast adenocarcinoma
   (MCF7) cancer cell lines. Significant cytotoxicity has been determined
   for the complexes 3 (IC(50) = 6.2 mu M) and 5 (IC(50) m 6.8 mu M) on the
   MCF7 cell line, which is even better than that found for the well-known
   and widely-used platinum-bearing antineoplastic drugs, i.e. oxaliplatin
   and cisplatin. (C) 2009 Elsevier Inc. All rights reserved.,
DOI = 10.1016/j.jinorgbio.2009.04.008,
ISSN = 0162-0134,
Unique-ID = ISI:000267768200006,

B. S. Moyer, P. Baran, and Z. Travnicek, "Synthesis and coordination of pyridine N-oxide ligands using
diethylenetriamine," ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, vol. 237, 2009.
[Bibtex]

@article ISI:000207857805340,
Author = Moyer, Brandon S. and Baran, Peter and Travnicek, Zdenek,
Title = Synthesis and coordination of pyridine N-oxide ligands using
   diethylenetriamine,
Journal = ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY,
Year = 2009,
Volume = 237,
Month = MAR 22,
ISSN = 0065-7727,
Unique-ID = ISI:000207857805340,

P. Starha, Z. Travnicek, R. Herchel, I. Popa, P. Suchy, and J. Vanco, "Dinuclear copper(II) complexes containing 6-(benzylamino)purines as
bridging ligands: Synthesis, characterization, and in vitro and in vivo
antioxidant activities," JOURNAL OF INORGANIC BIOCHEMISTRY, vol. 103, iss. 3, pp. 432-440, 2009.
[Bibtex]

@article ISI:000263693900016,
Author = Starha, Pavel and Travnicek, Zdenek and Herchel, Radovan and Popa, Igor
   and Suchy, Pavel and Vanco, Jan,
Title = Dinuclear copper(II) complexes containing 6-(benzylamino)purines as
   bridging ligands: Synthesis, characterization, and in vitro and in vivo
   antioxidant activities,
Journal = JOURNAL OF INORGANIC BIOCHEMISTRY,
Year = 2009,
Volume = 103,
Number = 3,
Pages = 432-440,
Month = MAR,
Abstract = A series of dinuclear copper(II) complexes involving
   6-(benzylamino)purine derivatives, (HL(n)), as bridging ligands were
   synthesized, characterized and tested for both their in vitro and in
   vivo antioxidant activities. Based on results of elemental analyses,
   temperature dependence of magnetic susceptibility measurements, UV-vis,
   FTIR, EPR, NMR and MALDI-TOF mass spectroscopy, conductivity
   measurements and thermal analyses, the complexes with general
   compositions Of [Cu(2)(mu-HL(n))(4)Cl(2)]Cl(2)center dot 2H(2)O (1-4)
   and [Cu(2)(mu-HL(n))(2)(mu-Cl)(2)Cl(2)] (5-7) were prepared [where n
   = 1-4; HL(1) = 6-[(2-methoxybenzyl)amino]purine, HL(2) =
   6-[(4-methoxybenzyl)amino]purine, HL(3) =
   6-[(2,3-dimethoxybenzyl)amino]purine and HL(4) =
   6[(3,4-dimethoxybenzyl)amino]purine). In the case of complexes 2, 3, 5
   and 7, the antioxidant activities were studied by both in vitro
   [superoxide dismutase-mimic (SOD-mimic) activity) and in vivo
   (cytoprotective effect against the alloxan-induced diabetes
   (antidiabetic activity)) methods. The obtained IC(50) value of the
   SOD-mimic activity for the complex 5 (IC(50) = 0.253 mu M) was shown to
   be even better than that of the native bovine Cu,Zn-SOD enzyme (IC(50) =
   0.480 mu M), used as a standard. As for the antidiabetic activity, the
   pretreatment of mice with complexes 3 and 7 led to the complete
   elimination of cytotoxic attack of alloxan and its free radical
   metabolites, used as a diabetogenic agent. The cytoprotective effect of
   these compounds was proved by the preservation of the initial blood
   glucose levels of the pretreated animals, as against the untreated
   control group. (C) 2008 Elsevier Inc. All rights reserved.,
DOI = 10.1016/j.jinorgbio.2008.12.009,
ISSN = 0162-0134,
Unique-ID = ISI:000263693900016,

E. M. Zueva, M. M. Petrova, R. Herchel, Z. Travnicek, R. G. Raptis, L. Mathivathanan, and J. E. McGrady, "Electronic structure and magnetic properties of a trigonal prismatic
Cu(6)(II) cluster," DALTON TRANSACTIONS, iss. 30, pp. 5924-5932, 2009.
[Bibtex]

@article ISI:000268201400014,
Author = Zueva, Ekaterina M. and Petrova, Maria M. and Herchel, Radovan and
   Travnicek, Zdenek and Raptis, Raphael G. and Mathivathanan, Logesh and
   McGrady, John E.,
Title = Electronic structure and magnetic properties of a trigonal prismatic
   Cu(6)(II) cluster,
Journal = DALTON TRANSACTIONS,
Year = 2009,
Number = 30,
Pages = 5924-5932,
Abstract = A combination of detailed magnetisation studies and electronic-structure
   analysis using broken-symmetry DFT is used to explore the electronic
   structure of a trigonal prismatic Cu(6)(II) cluster. The presence of six
   paramagnetic metal centres with S = 1/2 gives rise to a maximum
   multiplicity of S = 3 and a total of 31 broken-symmetry states with M(s)
   < 3. Computed differences in energy between the high-spin and
   broken-symmetry states are expressed in terms of the 15 distinct
   Heisenberg exchange coupling parameters, J(ij), and the equations are
   solved by a least-squares fitting procedure. By inspection of the errors
   introduced by progressive symmetrisation of the Hamiltonian to reduce
   the number of independent J(ij), we arrive at a minimal model containing
   only four distinct J(ij) (three intra-and one inter-triangular). The
   computed values then guide the fitting of the magnetisation data. The
   computed trends in J(ij) can only be reproduced when antisymmetric
   exchange is included in the model Hamiltonian. The use of this
   Hamiltonian provides a reasonable description of the magnetic behaviour
   at all temperatures and fields. If a simpler isotropic model Hamiltonian
   is used instead, the best fit values of J(ij) are compromised by the
   need to fit the low-temperature region where antisymmetric exchange
   dominates the shape of the curve.,
DOI = 10.1039/b907805c,
ISSN = 1477-9226,
Unique-ID = ISI:000268201400014,

R. Herchel, Z. Sindelar, Z. Travnicek, R. Zboril, and J. Vanco, "Novel 1D chain Fe(III)-salen-like complexes involving anionic
heterocyclic N-donor ligands. Synthesis, X-ray structure, magnetic,
(57)Fe Mossbauer, and biological activity studies," DALTON TRANSACTIONS, iss. 44, pp. 9870-9880, 2009.
[Bibtex]

@article ISI:000271432600028,
Author = Herchel, Radovan and Sindelar, Zdenek and Travnicek, Zdenek and Zboril,
   Radek and Vanco, Jan,
Title = Novel 1D chain Fe(III)-salen-like complexes involving anionic
   heterocyclic N-donor ligands. Synthesis, X-ray structure, magnetic,
   (57)Fe Mossbauer, and biological activity studies,
Journal = DALTON TRANSACTIONS,
Year = 2009,
Number = 44,
Pages = 9870-9880,
Abstract = The iron(III) salen-type complexes [Fe(salen)(L)](n) (1-6) involving
   heterocyclic N-donor ligands HL \HL = 1H-imidazole (Himz),
   1H-tetrazol-5-amine (Hatz), 5-methyl-1H-tetrazole (Hmtz),
   1H-benzimidazole (Hbimz), 1H-1,2,4-triazole (Htriz) and 1H-benzotriazole
   (Hbtriz)\ have been prepared and characterised by elemental analysis,
   FT IR, CI mass and (57)Fe Mossbauer spectroscopies, and variable
   temperature magnetic measurements. Single crystal X-ray analysis of
   [Fe(salen)(btriz)](n) (6) revealed a 1D chain-polymeric structure of
   the complex with the btriz anion as a bridging ligand. Magnetic data for
   all complexes were fitted using Fisher's model (for S = 5/2) and also
   using a heptanuclear closed ring model showing a weak antiferromagnetic
   interaction (J approximate to -1 to -2 cm(-1)), and moreover,
   molecule-based magnet properties have been observed in the case of
   [Fe(salen)(atz)](n) (2). The exponential correlation between the
   magnetic properties (the isotropic exchange parameter J) and the
   basicity of the free ligands (K(b)) has been found. The
   antiferromagnetic ordering as well as a moderate structural
   dissimilarity in the vicinity of iron atoms has been proved by the
   (57)Fe Mossbauer low-temperature (2 K) in-field (7 T) experiments in the
   case of (2), in which two sextets with the line intensities
   (3/4/1/3/4/1) have been observed. The compounds have been tested for
   their SOD-like activity, DNA cleavage activity, and in vitro
   cytotoxicity against two human cancer cell lines: chronic myelogenous
   erythroleukemia (K562) and breast adenocarcinoma (MCF7). The best result
   regarding the cytotoxicity has been achieved for the complex of
   [Fe(salen)(atz)](n) (2), where IC(50) = 6.4 mu M against K562.,
DOI = 10.1039/b912676g,
ISSN = 1477-9226,
Unique-ID = ISI:000271432600028,

2008

Z. Travnicek, J. Mikulik, M. Cajan, R. Zboril, and I. Popa, "Novel iron complexes bearing N6-substituted adenosine derivatives:
Synthesis, magnetic, (57)Fe Mossbauer, DFT, and in vitro cytotoxicity
studies," BIOORGANIC & MEDICINAL CHEMISTRY, vol. 16, iss. 18, pp. 8719-8728, 2008.
[Bibtex]

@article ISI:000259173400046,
Author = Travnicek, Zdenek and Mikulik, Jiri and Cajan, Michal and Zboril, Radek
   and Popa, Igor,
Title = Novel iron complexes bearing N6-substituted adenosine derivatives:
   Synthesis, magnetic, (57)Fe Mossbauer, DFT, and in vitro cytotoxicity
   studies,
Journal = BIOORGANIC \& MEDICINAL CHEMISTRY,
Year = 2008,
Volume = 16,
Number = 18,
Pages = 8719-8728,
Month = SEP 15,
Abstract = Iron complexes (1-7) involving N6-benzyladenosine derivatives of the
   predominant composition [Fe(L(n))Cl(3)]center dot H(2)O \where L(1) =
   N6-(2-fluorobenzyl)adenosine (1), L(2) = N6-(4-fluorobenzyl)adenosine
   (2), L(3) = N6-(2-trifluoromethylbenzyl)adenosine (3), L(4) =
   N6-(3-trifluoromethylbenzyl)adenosine (4), L(5) =
   N6-(4-trifluoromethylbenzyl)adenosine (5), L(6) =
   N6-(4-trifluoromethoxybenzyl)adenosine (6), and L(7) =
   N6-(4-chlorobenzyl)adenosine (7)\ have been synthesized. The compounds
   have been characterized by elemental analysis, variable-temperature and
   in-field (57)Fe Mossbauer, ES+ MS, FTIR, (1)H and (13)C NMR
   spectroscopies, magnetochemical and conductivity measurements, thermal
   (TGA/DSC/DTA) analyses, and DFT calculations. It has been found that the
   organic molecule is coordinated to iron via N7 atom of the appropriate
   adenosine derivative and the products are represented by mixtures of
   complexes with various iron oxidation (Fe(III)/Fe(II)) and spin states
   (S = 5/2, 4/2, 3/2, 2/2) and geometries (tetrahedral or trigonal
   bipyramidal). It is caused by the fact that partial redox processes
   proceed during the reactions due to the presence of a ribose moiety,
   which is oxidized to the corresponding 5'-ribotic acid, and
   simultaneously, a portion of Fe(III) cations is reduced to Fe(II) ones.
   Moreover, a significant effect of crystal water molecules on
   stereochemistry, and hence, on magnetic and spectral properties of the
   prepared complexes has been found. The compounds have been tested for
   their in vitro cytotoxicity against the following human cancer cell
   lines: malignant melanoma (G-361), osteogenic sarcoma (HOS), chronic
   myelogenous leukemia (K-562), and breast adenocarcinoma (MCF-7). The
   most important results have been obtained for complex 2 with IC(50)
   values 8-16 mu M against HOS, K-562, and MCF-7 cell lines, and for
   complex 6 with IC50 value 4 mu M against MCF-7 cell line. (C) 2008
   Elsevier Ltd. All rights reserved.,
DOI = 10.1016/j.bmc.2008.07.082,
ISSN = 0968-0896,
Unique-ID = ISI:000259173400046,

L. Szucova, Z. Travnicek, I. Popa, and J. Marek, "Preparation and cis-to-trans transformation study of square-planar
[Pt(L(n))2Cl(2)] complexes bearing cytokinins derived from
6-benzylaminopurine (L(n)) by view of NMR spectroscopy and X-ray
crystallography," POLYHEDRON, vol. 27, iss. 12, pp. 2710-2720, 2008.
[Bibtex]

@article ISI:000258616400029,
Author = Szucova, Lucie and Travnicek, Zdenek and Popa, Igor and Marek, Jaromir,
Title = Preparation and cis-to-trans transformation study of square-planar
   [Pt(L(n))2Cl(2)] complexes bearing cytokinins derived from
   6-benzylaminopurine (L(n)) by view of NMR spectroscopy and X-ray
   crystallography,
Journal = POLYHEDRON,
Year = 2008,
Volume = 27,
Number = 12,
Pages = 2710-2720,
Month = AUG 21,
Abstract = Mononuclear, square-planar platinum(II) complexes involving derivatives
   of aromatic cytokinins as the ligands, and having the general formula
   cis-[Pt(L(n))(2)Cl(2)] (1-3) and trans-[Pt(L(n))(2)Cl(2)] (4-6),
   where n = 13, L(1) = 2-chloro-6-(benzylamino)-9-isopropylpurine, L(2) =
   2-chloro-6-[(4-methoxybenzyl)amino]-9-isopropylpurine and L(3) =
   2-chloro-6-[(2-methoxybenzyl)-amino]-9-isopropylpurine, have been
   synthesized and characterized by elemental analysis, MALDI-TOF mass, FT
   IR, (1)H, (13)C, (15)N and (195)Pt NMR spectral measurements. Dynamic
   cis-to-trans isomerization process of complex 1 in
   N,N'-dimethylformamide (DMF) has been investigated by means of
   multinuclear NMR spectroscopy. The solid-state structures of 1, 4 center
   dot (DMF)(2), and 5 have been determined by single crystal X-ray
   analysis. X-ray structures revealed that the heterocyclic ligands are
   coordinated to platinum via nitrogen atom N(7) in all the complexes
   studied. In vitro cytotoxicity of the prepared complexes against MCF7,
   G361, K562, and HOS has been evaluated. Owing to low solubility of the
   complexes in water, the cytotoxicity has been only tested up to 5 mu M
   concentration. Unfortunately, all complexes have been found to be
   non-cytotoxic in the accessible concentration range.,
DOI = 10.1016/j.poly.2008.05.021,
ISSN = 0277-5387,
Unique-ID = ISI:000258616400029,

Z. Travnicek, M. Matikova-Malarova, and J. Mikulik, "6-(2-Methoxybenzylamino)purine," ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE, vol. 64, iss. Part 5, pp. O823-U1592, 2008.
[Bibtex]

@article ISI:000255450100153,
Author = Travnicek, Zdenek and Matikova-Malarova, Miroslava and Mikulik, Jiri,
Title = 6-(2-Methoxybenzylamino)purine,
Journal = ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE,
Year = 2008,
Volume = 64,
Number = Part 5,
Pages = O823-U1592,
Month = MAY,
Abstract = The title compound, C13H13N5O, consists of discrete molecules connected
   by N-H center dot center dot center dot N hydrogen bonds to form
   infinite chains, with N center dot center dot center dot N separations
   of 3.0379 (15) and 2.8853 (15) angstrom. The benzene and purine ring
   systems make a dihedral angle of 77.58 (3)degrees. The crystal structure
   is further stabilized by intramolecular N center dot center dot center
   dot O interactions [2.9541 (12) angstrom] and intermolecular C-H
   center dot center dot center dot C and C center dot center dot center
   dot C contacts [3.304 (2), 3.368 (2), 3.667 (2), 3.618 (2) and 3.512
   (2) angstrom] which arrange the molecules into graphite-like layers. The
   interlayer separations are 3.248 and 3.256 angstrom.,
DOI = 10.1107/S1600536808009203,
ISSN = 1600-5368,
Unique-ID = ISI:000255450100153,

K. M. George, P. Baran, Z. Travnicek, and L. Stajgerova, "INOR 794-Synthesis of guanine N-oxides and their complexes," ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, vol. 235, 2008.
[Bibtex]

@article ISI:000271775106043,
Author = George, Kara M. and Baran, Peter and Travnicek, Zdenek and Stajgerova,
   Lenka,
Title = INOR 794-Synthesis of guanine N-oxides and their complexes,
Journal = ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY,
Year = 2008,
Volume = 235,
Month = APR 6,
Note = 235th American-Chemical-Society National Meeting, New Orleans, LA, APR
   06-10, 2008,
Organization = Amer Chem Soc,
ISSN = 0065-7727,
Unique-ID = ISI:000271775106043,

J. D. Houck, A. Klanicova, Z. Travnicek, and P. Baran, "CHED 1156-Copper(II) complexes of 6-(benzylamino)purines with 1,
10-phenanthroline," ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, vol. 235, 2008.
[Bibtex]

@article ISI:000271775101770,
Author = Houck, Joseph D. and Klanicova, Alena and Travnicek, Zdenek and Baran,
   Peter,
Title = CHED 1156-Copper(II) complexes of 6-(benzylamino)purines with 1,
   10-phenanthroline,
Journal = ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY,
Year = 2008,
Volume = 235,
Month = APR 6,
Note = 235th American-Chemical-Society National Meeting, New Orleans, LA, APR
   06-10, 2008,
Organization = Amer Chem Soc,
ISSN = 0065-7727,
Unique-ID = ISI:000271775101770,

M. C. Vesper, P. Baran, and Z. Travnicek, "INOR 793-Synthesis of 2-(o-thiophenyliminomethyl)pyridine N-oxide," ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, vol. 235, 2008.
[Bibtex]

@article ISI:000271775106215,
Author = Vesper, Matthew C. and Baran, Peter and Travnicek, Zdenek,
Title = INOR 793-Synthesis of 2-(o-thiophenyliminomethyl)pyridine N-oxide,
Journal = ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY,
Year = 2008,
Volume = 235,
Month = APR 6,
Note = 235th American-Chemical-Society National Meeting, New Orleans, LA, APR
   06-10, 2008,
Organization = Amer Chem Soc,
ISSN = 0065-7727,
Unique-ID = ISI:000271775106215,

Zdeněk Trávníček

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