Coordination compounds exhibiting magnetic bistability

Research on molecular magnetic materials has seen significant developments in recent decades. Magnetism is inevitably linked to the presence of unpaired electrons, and so both organic molecular materials (such as radical compounds or graphene derivatives) and coordination (complex) compounds show interesting magnetic properties. Anyway, complexes are more promising because they allow fine tuning of the resulting properties. Different types of magnetic centres, their mutual spatial arrangement and their magnetic interactions lead to different types of magnetic behaviour, of which magnetic bistability is probably studied the most. It is manifested by the existence of two stable magnetic states and is often accompanied by some type of hysteresis (e.g. temperature, field). Traditional materials exhibiting magnetic bistability include magnetically ordered materials such as ferro- and ferrimagnetics, which are part of many technological devices (e.g. electric motors, hard disks and magnetic tapes) and are known in everyday life as classical magnets. The new types of molecular materials can also exhibit magnetic ordering and, in addition, compared to traditional metal- or metal oxide-based magnets, bring more varied possibilities for chemical tuning, solubility in conventional solvents, transparency, and more.

Molecular materials exhibit magnetic bistability even in the cases where there is no magnetic ordering, but the material is able to exhibit slow relaxation of magnetization. Such materials include so-called Single-Molecule Magnets (SMMs), in which each individual molecule behaves like a nanomagnet. Discoveries and phenomena at the quantum level manifested in single-molecule magnets provide a perspective in the field of further miniaturization of storage media or recording units. The phenomenon of quantum entanglement of SMMs is also of great interest and is studied for the potential use in quantum computers, in which SMMs could represent so-called qubits, i.e. carriers of quantum information. In general, SMM behaviour can be observed for molecules with different numbers of paramagnetic centres, and due to their composition and structure, the following subgroups are usually distinguished. Single-Ion Magnets: these are SMMs with a single paramagnetic centre. They represent the most promising group of SMMs so far, showing slow relaxation of magnetization and magnetic field hysteresis up to 80 K. Single-Chain Magnets: these are polymeric substances in which a 1D chain is responsible for the slow relaxation of magnetization. Single-Molecule Toroics: these are SMMs that also exhibit a toroidal magnetic moment topology.

Another important group of paramagnetic coumpounds with no magnetic ordering is represented by compounds that exhibit spin state crossover (SCO from "Spin Crossover"). This phenomenon can occur for central atoms with electron configurations 3d⁴ to 3d⁷ in octahedrally coordinated complex compounds. SCO refers to the thermodynamic transition between different spin states, and thus at least two different spin states (with different magnetic and other physical properties) can coexist under the same conditions, where the equilibrium between them depends on temperature, pressure and radiation. From the technical point of view, the most interesting cases are those where the transition occurs at room temperature and, in addition, temperature hysteresis is observed (for real applications, a hysteresis width of about 50 K is needed), and thus such substance can store information, which can be used in the production of memory devices. Other important characteristic involves a colour change at the spin transition and the possibility of inducing the spin transition by radiation - properties that can be used in the design of molecular sensors and switches.

At the Department of Inorganic Chemistry, we synthesize and investigate magnetic properties of 3d, 3d-4f and 4f coordination compounds with heterocyclic or macrocyclic ligands or Schiff base type ligands. We focus on the study of the relationship between the structure and magnetic properties of the prepared compounds. Examples of such research include the study of the effect of coordination polyhedron topology and magnetic anisotropy in, for example, 3d single-ion magnets, or the effect of the strength of intermolecular interactions on the critical temperature and the steepness of the spin transition in compounds exhibiting SCO.

Coordination compounds in bioinorganic chemistry

Bioinorganic chemistry is a field of chemistry which deals with compounds and chemical processes in living organisms whose key role is tied to the presence of primarily metallic elements. Examples include metalloenzymes (which represent about 30% of all enzyme systems), metal-based drugs (e.g. platinum-based anticancer drugs), metal-based diagnostics and sensors (e.g. gadolinium-based contrast agents for magnetic resonance imaging), or systems for the transport of respiratory gases and other molecules. The relevance of the field can be demonstrated by the intensive development in the field of pharmaceuticals, which has increasingly been focused on biologically active transition metal coordination compounds. In view of the enormous chemical and structural variability and the ever-expanding possibilities of pharmacological research of these compounds, not only the extensive development of new biologically active coordination compounds of transition metals as well as the increase in their use in clinical practice can be expected in the coming years.

One of the main directions of bioinorganic chemistry is represented by the development of new biologically active coordination compounds. The history of this direction dates back to the discovery of the anticancer properties of the so-called cisplatin (cis-diammine-dichloridoplatinum complex). Cisplatin was followed by some other platinum complexes (e.g. oxaliplatin), which are also used in oncological practice for the treatment of various types of tumours, and later also by complexes of other transition metals (e.g. copper, titanium, palladium or ruthenium), which were tested in the past or are currently being tested as potential therapeutics in human cancer patients in various phases of clinical experiments. It can be concluded that one of the goals of bioinorganic chemists is to develop new anticancer active compounds which are (a) more active than conventional chemotherapeutic drugs, (b) exhibit no or negligible side effects, (c) act by a different mechanism of action than currently used drugs, and (d) overcome the resistance of certain types of tumours to commercial chemotherapeutic drugs.

Another important area of bioinorganic chemistry is represented by the preparation and research of contrast agents used in various diagnostic imaging methods in medicine, which are very often based on coordination compounds. These very sophisticated imaging methods allow images to be obtained of internal body structures varying in intensity or contrast. This contrast is usually not sufficient, and so so-called contrast agents are used to increase it. Due to the varying distribution of the contrast agent in the body, it is possible to image or highlight anatomical structures, pathological phenomena or functions and processes. The most commonly used diagnostic methods involve magnetic resonance imaging (MRI), as well as optical imaging (OI) or methods which use ionising radiation, such as positron emission tomography (PET), etc. If the contrast agents are at the same time drugs, allowing their therapeutic effect to be mapped in the body, these are so-called theranostics, which represent the latest research focus in this field.

Within the long-term systematic research activities, members of the Department of Inorganic Chemistry are focused on the rational design, synthesis and characterisation of new pharmacologically promising coordination compounds of various transition elements, coordination compounds with potential use in diagnostic imaging methods, or nanoparticles/quantum dots usable in biological systems. Currently, these involve mainly innovative coordination compounds based on various platinum (e.g. ruthenium or iridium) or other metals (e.g. tantalum, manganese, copper). In cooperation with various domestic and foreign external partners, the compounds prepared by us are then biologically analysed in detail for their e.g. anticancer, antimicrobial or antiradical activity or their stability and effectiveness as potential contrast agents can be investigated.

As one of the 12 principles of green chemistry, catalysis strongly contributes to the development of more eco-friendly approaches in the chemical industry. Catalysts help to increase selectivity of chemical reactions, minimise waste and reduce time and energy demands.  Nowadays, most of the synthetic routes towards value-added chemicals such as polymers, drugs etc. contains a reaction step which is performed catalytically. However, with the inevitable transition from fossil to renewable sources, new types of catalytic systems need to be developed to use this type of feedstock (biomass, carbon dioxide, hydrogen) to its full potential. With this motivation, the Catalysis research programme at the Department of Inorganic Chemistry covers both homogeneous and heterogeneous catalysis.

Homogeneous catalysis

In homogeneous catalysis, the catalyst is present in the same phase as the reactants. Catalysts of this type are often organometallic or coordination compounds of transition metals and the individual steps of the catalytic cycle take place in the coordination sphere of a single metal ion/atom. The efficiency and selectivity of such catalytic systems can be tuned by the choice of ligands which are coordinated to the metal centre, typically by varying the electronic and steric properties of these ligands.

At the Department of Inorganic Chemistry, we are focused on transition metal complexes of carbene- and phosphine‑based functional hybrid ligands. These ligands should benefit from properties such as hemilability, redox activity and non-innocence and have the potential to induce positive cooperative effects, namely metal-ligand and metal-metal cooperation, and to actively participate on the catalytic cycle. The goal is to develop new efficient and selective catalysts via rational ligand design and utilise them in transformations such as transfer hydrogenation, C−C and C−heteroatom coupling, and small molecule activation.

Heterogeneous catalysis

A section of our department is fully devoted to developing novel functional nanomaterials which can be used as catalysts or support materials for the immobilization of metal-based species including single atoms. Functionalization of nanomaterials is a well-accepted approach in the various fields of research including thermal-, photo- and electrolysis for the development of efficient catalysts via doping (metal/non-metal), covalent bonding and physical deposition.

Single atom catalysts (SACs) are the new type of heterogeneous catalyst comprising isolated single atoms deposited on the surface of a solid support. SACs display unprecedented catalytic activity due to novel support-atom interactions, neighbouring environment and coordination number. In general, we determine the relation between functionality and activity of the catalysts to investigate the real active sites and reaction mechanism. Support plays a vital role in determining the catalytic activity and therefore its selection and functionalization is important to achieve optimum results. Subsequently, we work on various types of nanomaterials such as graphene derivatives, porous carbon material, carbon nanotubes, organic polymers and carbon nitride depending on the target application. Moreover, the synthesised catalysts can be integrated with the micro-flow reactor to investigate their efficacy under flow conditions for a green transformation reaction with the aim to scale up the process.

At the Department of Inorganic Chemistry, we focus on the development of chemistry didactics and the improvement of education for future teachers. In addition to participating in research projects such as EU ERDF projects (Improvement of the Study Environment), EU ESF projects (Modern Teaching Methods for Comprehensive Education), and the Undergraduate Education II project (Improving the Preparation of Future Teachers), we contribute to the creation of new didactic materials, aids, and support active teaching methods. Chemistry didactics at the Department of Inorganic Chemistry closely cooperates with chemistry didactics from other faculties (Education and Natural Sciences), for example, through joint projects and participation in projects such as the Operational Programme Research, Development, and Education - Didactics - Human and Nature A and the NATURE Project (Natural Science Subject Didactics A Practicing Teachers). We collaborate with the Faculty of Science and the Faculty of Education of the University on didactic research in the field of chemical education in secondary schools throughout the Czech Republic. We participate in the analysis of the initial level of subject knowledge and skills of students as a prerequisite for their university studies.

One of our activities is the creation of didactic websites called "CHEMIE ŽIJE!" (www.chemiezije.upol.cz), which serve as a source of new online available materials for chemical education. These websites are developed in collaboration with university students who contribute to the creation of educational materials using modern information and communication technologies and gain valuable experience in this field. The websites gradually accumulate study materials that are accessible not only to our students but also to teachers and students in educational practice and the general public. They can find interesting teaching materials, professional photographs, presentations, videos, and didactic games. One of the attractive features of the websites is an interactive map of industrial chemistry, which displays chemical companies in the Czech Republic and also includes accompanying materials for possible excursions. These websites represent a useful resource not only for our students but also for teachers who want to enrich their teaching and present chemistry in a playful form connected to real-life situations.

The didactics section of the Department of Inorganic Chemistry actively engages in the popularization of science through various events such as Researchers' Night, Open Day, Science Fair, University Student Week in Nature, Nature Roadshow, and Explorer. We aim to bring science closer to the general public and motivate young people to take an interest in natural science fields. In addition, we organize targeted excursions for primary and secondary schools, which allow students to discover interesting aspects of science and can motivate them to study natural science fields. The creation of didactic materials and participation in popularization events provide us with an opportunity to expand students' and the public's interest in science and support its promotion.

35.

P. Kumar, P. Antal, X. Wang, J. Wang, D. Trivedi, O. F. Fellner, Y. A. Wu, I. Nemec, V. T. Santana, J. Kopp, P. Neugebauer, J. Hu, M. G. Kibria, S. Kumar, Partial Thermal Condensation Mediated Synthesis of High‐Density Nickel Single Atom Sites on Carbon Nitride for Selective Photooxidation of Methane into Methanol. Small, 2023, 2304574. DOI: 10.1002/smll.202304574

34.

A. Mrkvicová, E. Peterová, I. Nemec, R. Křikavová, D. Muthná, R. Havelek, P. Kazimírová, M. Řezáčová, P. Štarha, Rh(III) and Ru(II) complexes with phosphanyl-alkylamines: inhibition of DNA synthesis induced by anticancer Rh complex. Future Med. Chem. 2023, 15, 1583–1602. DOI: 10.4155/fmc-2023-0170

33.

K. Kotrle, I. Nemec, P. Antal, K. Petrželová, E. Čižmár, R. Herchel, 2-Formylphenoxyacetic acid Schiff bases: a promising ligand scaffold for readily available trigonal prismatic Co(II) single-ion magnets. Inorg. Chem. Front., 2023, 10, 7319-7332. DOI: 10.1039/D3QI01691A

32.

E. Zahradníková, J. P. Sutter, P. Halaš, B. Drahoš, Trigonal prismatic coordination geometry imparted by a macrocyclic ligand: an approach to large axial magnetic anisotropy for Co(II). Dalton Trans. 2023, 52, 18513–1852. DOI: 10.1039/D3DT02639F

31.

R. G. Kadam, M. Medved’, S. Kumar, D. Zaoralová, G. Zoppellaro, Z. Bad’ura, T. Montini, A. Bakandritsos, E. Fonda, O. Tomanec, M. Otyepka, R. S. Varma, M. B. Gawande, P. Fornasiero, R. Zbořil, Linear-Structure Single-Atom Gold(I) Catalyst for Dehydrogenative Coupling of Organosilanes with Alcohols. ACS Catal., 2023, 13, 16067-16077. DOI: 10.1021/acscatal.3c03937

30.

P. Halaš, I. Nemec, R. Herchel, Honey-like Odor Meets Single-Ion Magnet: Synthesis, Crystal Structure, and Magnetism of Cobalt(II) Complex with Aromatic Trans-Cinnamic Acid. Magnetochemistry 2023, 9, 229. DOI: 10.3390/magnetochemistry9110229

29.

L. Kosaristanova, M. Rihacek, F. Sucha, V. Milosavljevic, P. Svec, J. Dorazilova, L. Vojtova, P. Antal, P. Kopel, Z. Patocka, V. Adam, L. Zurek, K. Dolezelikova, Synergistic antibacterial action of the iron complex and ampicillin against Staphylococcus aureus. BMC Microbiology 2023, 23, 288. DOI: 10.1186/s12866-023-03034-1

28.

A. B. Younis, V. Milosavljevic, T. Fialova, K. Smerkova, H. Michalkova, P. Svec, P. Antal, P. Kopel, V. Adam, L. Zurek, K. Dolezelikova, Synthesis and characterization of TiO₂ nanoparticles combined with geraniol and their synergistic antibacterial activity. BMC Microbiology 2023, 23, 207. DOI: 10.1186/s12866-023-02955-1 

27.

J. N. Giraldo, J. Hrubý, Š. Vavrečková, O. F. Fellner, L. Havlíček, D. Henry, S. de Silva, R. Herchel, M. Bartoš, I. Šalitroš, V. T. Santana, P. Barbara, I. Nemec, P. Neugebauer, Tetracoordinate Co(II) complexes with semi-coordination as stable single-ion magnets for deposition on graphene. Phys. Chem. Chem. Phys., 2023, 25, 29516–29530. DOI: 10.1039/D3CP01426F

26.

K. Kotrle, M. Atanasov, F. Neese, R. Herchel, Theoretical Magnetic Relaxation and Spin–Phonon Coupling Study in a Series of Molecular Engineering Designed Bridged Dysprosocenium Analogues. Inorg. Chem. 2023, 62 (42), 17499–17509. DOI: 10.1021/acs.inorgchem.3c02916.

25.

R. Křikavová, M. Romanovová, Z. Jendželovská, M. Majerník, L. Masaryk, P. Zoufalý, D. Milde, J. Moncol, R. Herchel, R. Jendželovský, I. Nemec, Impact of the central atom and halido ligand on the structure, antiproliferative activity and selectivity of half-sandwich Ru(II) and Ir(III) complexes with a 1,3,4-thiadiazole-based ligand. Dalton Trans. 2023, 52, 12717–12732.  DOI: 10.1039/D3DT01696J

24.

J. Juráková, O. F. Fellner, S. Schlittenhardt, Š. Vavrečková, I. Nemec, R. Herchel, E. Čižmár, V. T. Santana, M. Orlita, D. Gentili, G. Ruani, M. Cavallini, P. Neugebauer, M. Ruben, I. Šalitroš, Neutral cobalt(ii)-bis(benzimidazole)pyridine field-induced single-ion magnets for surface deposition. Inorg. Chem. Front. 2023, 10, 5406–5419. DOI:  10.1039/D3QI00931A

23.

M. Tomanová, I. Vaňková, D. Toman, A. Přibylka, I. Nemec, P. Cankař, Axially Chiral Sulfonic Acids for Brønsted Acid Catalysis: 8-Benzoimidazolylnaphthalene-1-sulfonic Acids and Their Derivatives, J. Org. Chem. 2023, 88, 9265–9276. DOI: 10.1021/acs.joc.3c00818

22.

M. Loffelmann, Z. Škrott, D. Majera, P. Štarha, V. Kryštof, M. Mistrík, Identification of novel dithiocarbamate-copper complexes targeting p97/NPL4 pathway in cancer cells. Eur. J. Med. Chem. 2023, 261, 115790. DOI: 10.1016/j.ejmech.2023.115790

21.

J. Haribabu, N. Balakrishnan, S. Swaminathan, D.P. Dorairaj, M. Azam, M.K.M. Subarkhan, Y.-L. Chang, S.C.N. Hsu, P. Štarha, R. Karvembu, Michael addition-driven synthesis of cytotoxic palladium(II) complexes from chromone thiosemicarbazones: investigation of anticancer activity through in vitro and in vivo studies. New. J. Chem. 2023, 47, 15748–15759. DOI: 10.1039/D3NJ02067C

20.

B. Dutta, T. Guizouarn, F. Pointillart, K. Kotrle, R. Herchel, D. Ray, Lanthanoid coordination prompts unusually distorted pseudo-octahedral NiII coordination in heterodinuclear Ni–Ln complexes: synthesis, structure and understanding of magnetic behaviour through experiment and computation. Dalton Trans., 2023, 52, 10402–10414. DOI: 10.1039/D3DT01387A

19.

T. Šilha, R. Herchel, I. Nemec, Mn(III)–Salen Complexes with Metallophilic Interactions. Crystals 2023, 13, 1217. DOI: 10.3390/cryst13081217

18.

T. N. T. Nguyen, N. T. Pham, D. H. Ngo, S. Kumar, X. T. Cao, Covalently Functionalized Graphene with Molecularly Imprinted Polymers for Selective Adsorption and Electrochemical Detection of Chloramphenicol. ACS Omega, 2023, 8(28), 25385–25391. DOI: 10.1021/acsomega.3c02839

17.

M. Schoeller, M. Piroš, M. Litecká, K. Koňariková, F. Jozefíková, A. Šagátová, E. Zahradníková, J. Valentová, J. Moncol, Bipyridine Ruthenium(II) Complexes with Halogen-Substituted Salicylates: Synthesis, Crystal Structure, and Biological Activity. Molecules, 2023, 28, 4609. DOI: 10.3390/molecules28124609

16.

M. Pražáková, D. Ndiaye, É. Tóth, B. Drahoš, A seven-coordinate Mn(II) complex with a pyridine-based 15-membered macrocyclic ligand containing one acetate pendant arm: structure, stability and relaxation properties. Dalton Trans. 2023, 52, 7936–7947. DOI: 10.1039/D3DT00701D

15.

L. Masaryk, D. Weiser Drozdková, K. Słoczyńska, J. Moncol’, D. Milde, R. Křikavová, J. Popiół, E. Pękala, K. Ondrušková, I. Nemec, K. Smešný Trtková, P. Štarha, Anti-myeloma pro-apoptotic Pt(II) diiodido complexes. Inorg. Chem. Front. 2023, 10, 3307–3318. DOI: 10.1039/d3qi00327b

14.

Z. Šindelář, P. Kopel, Bis(benzimidazole) Complexes, Synthesis and Their Biological Properties: A Perspective. Inorganics 2023, 11(3), 113. DOI: 10.3390/inorganics11030113

13.

N.C. Jana, M. Jagodič, P. Brandão, M. Patra, R. Herchel, Z. Jagličić, A. Panja, Magneto-structural studies on a number of doubly end-on cyanate and azide bridged dinuclear nickel(ii) complexes with {N3O} donor Schiff base ligands, RSC Adv. 2023, 13, 11311–11323. DOI: 10.1039/D3RA00737E

12.

K. Mitrevska, M.A.M. Rodrigo, N. Cernei, H. Michalkova, Z. Splichal, D. Hynek, O. Zitka, Z. Heger, P. Kopel, V. Adam, Chick chorioallantoic membrane (CAM) assay for the evaluation of the antitumor and antimetastatic activity of platinum-based drugs in association with the impact on the amino acid metabolism. Mater. Today Bio 2023, 19, 14. DOI: 10.1016/j.mtbio.2023.100570

11.

E.S. Bazhina, A.A. Bovkunova, M.A. Shmelev, A.A. Korlyukov, A.A. Pavlov, L. Hochvaldova, L. Kvitek, A. Panacek, P. Kopel, I.L. Eremenko, Zinc(II) and copper(II) complexes with N-substituted imines derived from 4-amino-1,2,4-triazole: Synthesis, crystal structure, and biological activity. Inorg. Chim. Acta 2023, 547, 9. DOI: 10.1016/j.ica.2022.121359

10.

I. Loubalova, P. Kopel, Coordination Compounds of Cu, Zn, and Ni with Dicarboxylic Acids and N Donor Ligands, and Their Biological Activity: A Review. Molecules 2023, 28, 29. DOI: 10.3390/molecules28031445

9.

B. Dutta, E.C. Sañudo, R. Herchel, D. Ray, Ancillary Ligand Coordination Directed Modes of Aggregation in Mixed-Valence Tetranuclear Cobalt Complexes: Synthesis, Structure, Field-Induced SIM Behavior, and Theoretical Insights, Cryst. Growth Des. 2023, 23, 2169–2181. DOI: 10.1021/acs.cgd.2c01192.

8.

N. Malinová, J. Juráková, B. Brachňaková, J.D. Midlíková, E. Čižmár, V.T. Santana, R. Herchel, M. Orlita, I. Mohelský, J. Moncol, P. Neugebauer, I. Šalitroš, Magnetization Slow Dynamics in Mononuclear Co(II) Field-Induced Single-Molecule Magnet, Cryst. Growth Des. 2023, 23, 2430–2441. DOI: 10.1021/acs.cgd.2c01388.

7.

K. Petrželová, K. Sadílková, M. Klečková, Exkurze do chemických podniků – metodika, tvorba interaktivní mapy chemického průmyslu a podpůrných materiálů. Chemické Listy 2023, 117(3), 177–184. DOI: 10.54779/chl20230177

6.

S. M. Hossain, S. Kamilya, S. Ghosh, R. Herchel, M. A. Kiskin, S. Mehta, A. Mondal, Tuning of Dimensionality and Nuclearity as a Function of Ligand Field Modulation Resulting in Field-Induced Cobalt(II) Single-Ion Magnet. Cryst. Growth Des. 2023, 23(3), 1656–1667. DOI: 10.1021/acs.cgd.2c01255

5.

I. Nemec, L. Kotásková, R. Herchel, Variation of Spin-Transition Temperature in the Iron(III) Complex Induced by Different Compositions of the Crystallization Solvent. Cryst. Growth Des. 2023, 23(3), 1323–1329. DOI: 10.1021/acs.cgd.2c01411

4.

J. Orvoš, R. Fischer, B. Brachňaková, J. Pavlik, J. Moncoľ, A. Šagátová, M. Fronc, J. Kožíšek, L. Routaboul, A. Bousseksou, I. Šalitroš, Pyridyl-benzimidazole derivatives decorated with phenylazo substituents and their low-spin iron(ii) complexes: a study of the synthesis, structure and photoisomerization. New J. Chem. 2023, 47, 1488–1497. DOI:10.1039/D2NJ04774H

3.

K. Pramanik, Z. Jagličić, R. Herchel, P. Brandão, N.C. Jana, A. Panja, Combined experimental and theoretical studies on a series of mononuclear LnIII single-molecule magnets: dramatic influence of remote substitution on the magnetic dynamics in Dy analogues. Dalton Trans. 2023, 52, 1241–1256. DOI: 10.1039/D2DT03354B.

2.

I. Loubalova, E. Zahradnikova, L. Masaryk, I. Nemec, L. Hochvaldova, A. Panacek, L. Kvitek, R. Vecerova, M. Swiatkowski, P. Kopel, Antibacterial study on nickel and copper dicarboxylate complexes. Inorg. Chim. Acta 2023, 545, 121273. DOI: 10.1016/j.ica.2022.121273

1.

R. Pechancová, J. Gallo, D. Baron, D. Milde, P. Antal, Z. Svobodová, K. Lemr, T. Pluháček, Detailed insight into chromium species released from failed CoCrMo implants: Ex vivo periprosthetic tissues study. J. Biomed. Mat. Res. B, 2023, 111(2), 271–283. DOI: 10.1002/jbm.b.35149

• Machata, M.; Herchel, R.; Nemec , I.; Trávníček, Z. Crystal structures and magnetic properties of two series of phenoxo-O bridged dinuclear Ln₂ (Ln = Gd, Tb, Dy) complexes. Dalton Transactions 46 (2017) 16294-16305, DOI:10.1039/C7DT03441E

• Nemec, I.; Herchel, R.; Machata, M.; Trávníček, Z. Tetranuclear Ni(II) and Co(II) Schiff-base complexes with an M4O6 defective dicubane-like core: zero-field SMM behavior in the cobalt analogue. New Journal of Chemistry 41 (2017) 11258-11267. DOI:10.1039/C7NJ02281F

• Vančo, J.; Trávníček, Z.; Hošek, J.; Suchý, P. Jr. In vitro and in vivo anti-inflammatory active copper(II)-lawsone complexes. PLoS ONE 12 (2017) e0181822. DOI:10.1371/journal.pone.0181822

• Vančo, J.; Trávníček, Z.; Křikavová, R.; Gáliková, J.; Chalupová, M. Molecular, cellular and pharmacological effects of platinum(II) diiodido complexes containing 9-deazahypoxanthine derivatives: A group of broad-spectrum anticancer active agents. Journal of Photochemistry and Photobiology B: Biology 173 (2017) 423-433. DOI:10.1016/j.jphotobiol.2017.06.017

• Drahoš, B.; Herchel, R.; Trávníček, Z. Impact of Halogenido Coligands on Magnetic Anisotropy in Seven-Coordinate Co(II) Complexes. Inorganic Chemistry 56 (2017) 5076-5088. DOI:10.1021/acs.inorgchem.7b00235

• Herchel, R.; Kotrle, K.; Trávníček, Z. Magnetorefrigeration capability of a gadolinium(III) coordination polymer containing trimesic acid: a correlation between the isothermal magnetic entropy change and the gadolinium content. RSC Advances 7 (2017) 30763-30769. DOI:10.1039/c7ra04945e

• Machata, M.; Nemec, I.; Herchel, R.; Trávníček, Z. An octanuclear Schiff-base complex with a Na₂Ni₆ core: structure, magnetism and DFT calculations. RSC Advances 7 (2017) 25821-25827. DOI:10.1039/c7ra01374d

• Massoud, S.S.; Williams, G.F.; Louka, F.R.; Henary, M.M.; Herchel, R.; Trávníček, Z.; Fischer, R.C.; Mautner, F.A. Croconato-bridged copper(II) complexes: synthesis, structure and magnetic characterization. New Journal of Chemistry 41 (2017) 3846-3856. DOI:10.1039/c6nj03943j

• Altoum, A.O.S.; Vančo, J.; Křikavová, R.; Trávníček, Z.; Dvořák, Z.; Altaf, M.; Ahmad, S.; Sulaiman, A.A.A.; Isab, A.A. Synthesis, structural characterization and cytotoxicity evaluation of platinum(II) complexes of heterocyclic selenones. Polyhedron 128 (2017) 2-8. DOI:10.1016/j.poly.2017.02.027

• Nemec, I.; Herchel, R.; Kern, M.; Neugebauer, P.; van Slageren, J.; Trávníček, Z. Magnetic Anisotropy and Field‐induced Slow Relaxation of Magnetization in Tetracoordinate Co^II Compound [Co(CH₃‐im)₂Cl₂]. Materials 10 (2017) 249. DOI:10.3390/ma10030249

• Ručil, T.; Trávníček, Z.; Cankař, P. Ring-Opening Reactions of the N-4-Nosyl Hough-Richardson Aziridine with Nitrogen Nucleophiles. Journal of Organic Chemistry 82 (2017) 723-730. DOI:10.1021/acs.joc.6b01942

• Kubát, V.; Babiak, M.; Trávníček, Z.; Novosad, J. 3-(Diphenylchalcogenophosphoryl)propionic acids as precursors for metal selenides and tellurides. Polyhedron 124 (2017) 62–67. DOI:10.1016/j.poly.2016.12.034

• Štarha, P.; Vančo, J.; Trávníček, Z. Platinum complexes containing adenine-based ligands: An overview of selected structural features. Coordination Chemistry Reviews 332 (2017) 1–29. DOI:10.1016/j.ccr.2016.09.017.

• Bondarev, D.; Sivkova, R.; Šuly, P.; Polášková, M.; Krejčí, O.; Křikavová, R.; Trávníček, Z.; Zukal, A.; Kubů, M.; Sedláček, J. Microporous conjugated polymers via homopolymerization of 2,5-diethynylthiophene. European Polymer Journal 92 (2017) 213-219. DOI:10.1016/j.eurpolymj.2017.04.042

• Mirtamizdoust, B.; Trávníček, Z.; Hanifehpour, Y.; Talemi, P.; Hammud, H.; Joo, S.W. Synthesis and characterization of nano-peanuts of lead(II) coordination polymer [Pb(qcnh)(NO₃)₂]_n with ultrasonic assistance: A new precursor for the preparation of pure-phase nano-sized PbO. Ultrasonics Sonochemistry 34 (2017) 255-261. DOI:10.1016/j.ultsonch.2016.05.041

• Štarha, P.; Trávníček, Z.; Křikavová, R.; Dvořák, Z. Half-sandwich Ru(II) halogenido, valproato and 4-phenylbutyrato complexes containing 2,2′-dipyridylamine: synthesis, characterization, solution chemistry and in vitro cytotoxicity. Molecules 21 (2016) 1725. DOI:10.3390/molecules21121725

• Štarha, P.; Trávníček, Z.; Drahoš, B.; Dvořák, Z. In vitro antitumor active gold(I) triphenylphosphane complexes containing 7-azaindoles. International Journal of Molecular Sciences 17 (2016) 2084. DOI:10.3390/ijms17122084

• Nemec, I.; Herchel, R.; Trávníček, Z. Pentacoordinate and hexacoordinate Mn(III) complexes of tetradentate Schiff-base ligands containing tetracyanidoplatinate(II) bridges and revealing uniaxial magnetic anisotropy. Molecules 21 (2016) 1681. DOI:10.3390/molecules21121681

• Gusev, A.; Herchel, R.; Nemec, I.; Shulgin, V.; Eremenko, I. L.; Lyssenko, K.; Linert, W.; Trávníček, Z. Tetranuclear lanthanide complexes containing a hydrazone-type ligand. Dysprosium [2 × 2] gridlike single-molecule magnet and toroic. Inorg. Chem. 55 (2016) 12470-12476. DOI:10.1021/acs.inorgchem.6b02449

• Štarha, P.; Vančo, J.; Trávníček, Z.; Hošek, J.; Klusáková, J.; Dvořák, Z. Platinum(II) iodido complexes of 7-azaindoles with significant antiproliferative effects: an old story revisited with unexpected outcomes. PLoS ONE 11 (2016) e0165062. DOI:10.1371/journal.pone.0165062

• Herchel, R.; Nemec, I.; Machata, M.; Trávníček, Z. Solvent-induced structural diversity in tetranuclear Ni(II) Schiff-base complexes: the first Ni4 single-molecule magnet with a defective dicubane-like topology. Dalton Transactions 45 (2016) 18622-18634. DOI:10.1039/C6DT03520E

• Štarha, P.; Trávníček, Z.; Pazderová, L.; Dvořák, Z. Platinum(II) carboxylato complexes containing 7-azaindoles as N-donor carrier ligands showed cytotoxicity against cancer cell lines. Journal of Inorganic Biochemistry 162 (2016) 109–116. DOI:10.1016/j.jinorgbio.2016.06.018.

• Antal, P.; Drahoš, B.; Herchel, R.; Trávníček, Z. Muffin-like lanthanide complexes with an N₅O₂-donor macrocyclic ligand showing field-induced single-molecule magnet behaviour. Dalton Transactions 45 (2016) 15114-15121. DOI:10.1039/C6DT02537D

• Gajewska, M. J.; Bienko, A.; Herchel, R.; Haukka, M.; Jerzykiewicz, M.; Ozarowski, A.; Drabent, K.; Hung, C.-H. Iron(III) bis(pyrazol-1-yl)acetate based decanuclear metallacycles: synthesis, structure, magnetic properties and DFT calculations. Dalton Transactions 45 (2016) 15089-15096. DOI:10.1039/C6DT02333A

• Massoud, S. S.; Ledet, C. C.; Junk, T.; Bosch, S.; Comba, P.; Herchel, R.; Hošek, J.; Trávníček, Z.; Fischer, R. C.; Mautner, F. A.Dinuclear metal(ii)-acetato complexes based on bicompartmental 4-chlorophenolate: syntheses, structures, magnetic properties, DNA interactions and phosphodiester hydrolysis. Dalton Transactions 45 (2016) 12933-12950. DOI:10.1039/C6DT02596J

• Nemec, I.; Herchel, R.; Trávníček, Z. Ferromagnetic coupling mediated by Co⋯π non-covalent contacts in a pentacoordinate Co(II) compound showing field-induced slow relaxation of magnetization. Dalton Transactions 45 (2016) 12479-12482. DOI:10.1039/C6DT01539E

• Křikavová, R.; Vančo, J.; Trávníček, Z.; Hutyra, J.; Dvořák, Z. Design and characterization of highly in vitro antitumor active ternary copper(II) complexes containing 2′-hydroxychalcone ligands. Journal of Inorganic Biochemistry 163 (2016) 8-17. DOI:10.1016/j.jinorgbio.2016.07.005

• Herchel, R.; Dvořák, Z.; Trávníček, Z.; Mikuriya, M.; Louka, F. R.; Mautner, F. A.; Massoud, S. S. Cobalt(II) and copper(II) covalently and non-covalently dichlorido-bridged complexes of an unsymmetrical tripodal pyrazolyl-pyridyl amine ligand: structures, magnetism and cytotoxicity. Inorganica Chimica Acta 451 (2016) 102-110. DOI:10.1016/j.ica.2016.06.030

• Machalová Šišková, K.; Jančula, D.; Drahoš, B.; Machala, L.; Babica, P.; Alonso, P.G.; Trávníček, Z.; Tuček, J.; Maršálek, B.; Sharma, V.K.; Zbořil, R. High-valent iron (Fe^VI, Fe^V, and Fe^IV) species in water: characterization and oxidative transformation of estrogenic hormones. Physical Chemistry Chemical Physics 18 (2016) 18802-18810. DOI:10.1039/C6CP02216B

• Kubešová, K.; Trávníček, Z.; Dvořák, Z. Pleiotropic effects of gold(I) mixed-ligand complexes of 9-deazahypoxanthine on transcriptional activity of receptors for steroid hormones, nuclear receptors and xenoreceptors in human hepatocytes and cell lines. European Journal of Medicinal Chemistry 121 (2016) 530-540. DOI:10.1016/j.ejmech.2016.05.064

• Křikavová, R.; Vančo, J.; Šilha, T.; Marek J.; Trávníček Z. Synthesis, characterization, DNA binding studies and in vitro cytotoxicity of platinum(II)-dihalogenido complexes containing bidentate chelating N-donor ligands. Journal of Coordination Chemistry 69 (2016) 2422-2436. DOI:10.1080/00958972.2016.1199862

• Antal, P.; Drahoš, B.; Herchel, R.; Trávníček, Z. Late First-Row Transition-Metal Complexes Containing a 2-Pyridylmethyl Pendant-Armed 15-Membered Macrocyclic Ligand. Field-Induced Slow Magnetic Relaxation in a Seven-Coordinate Cobalt(II) Compound. Inorganic Chemistry 55 (2016) 5957-5972. DOI:10.1021/acs.inorgchem.6b00415

• Znaleziona, J.; Drahoňovský, D.; Drahoš, B.; Ševčík, J.; Maier, V. Novel cationic coating agent for protein separation by capillary electrophoresis. Journal of Separation Science 39 (2016) 2406-2412. DOI:10.1002/jssc.201501349

• Kubešová, K.; Dořičáková, A.; Trávníček, Z.; Dvořák, Z. Mixed-ligand copper(II) complexes activate aryl hydrocarbon receptor AhR and induce CYP1A genes expression in human hepatocytes and human cell lines. Toxicology Letters 255 (2016) 24-35. DOI:10.1016/j.toxlet.2016.05.014

• Rathi, A.K.; Gawande, M.K.; Pechoušek, J.; Tuček, J.; Aparicio, C.; Petr, M.; Tomanec, O.; Křikavová, R.; Trávníček, Z.; Varma, R.S.; Zbořil, R. Maghemite decorated with ultra-small palladium nanoparticles (γ-Fe₂O₃–Pd): applications in the Heck–Mizoroki olefination, Suzuki reaction and allylic oxidation of alkenes. Green Chemistry 18 (2016) 2363-2373. DOI:10.1039/C5GC02264A

• Drahoš, B.; Herchel, R.; Trávníček, Z. Structural and magnetic properties of heptacoordinated Mn^II complexes containing a 15-membered pyridine-based macrocycle and halido/pseudohalido axial coligands. RSC Advances 6 (2016) 34674-34684. DOI:10.1039/C6RA03754B

• Nemec, I.; Liu, H.; Herchel, R.; Zhang, X.; Trávníček, Z. Magnetic anisotropy in pentacoordinate 2,6-bis(arylazanylidene-1-chlorometyl)pyridine cobalt(II) complexes with chlorido co-ligands. Synthetic Metals 215 (2016) 158-163. DOI:10.1016/j.synthmet.2016.02.014

• Štarha, P.; Habtemariam, A.; Romero-Canelón, I.; Clarkson, G.J.; Sadler, P.J. Hydrogensulfide Adducts of Organo-Iridium Anticancer Complexes. Inorganic Chemistry 55 (2016) 2324-2331. DOI:10.1021/acs.inorgchem.5b02697

• Jeremiáš, L.; Babiak, M; Kubát, V.; Calhorda, M.J.; Trávníček, Z.; Novosad, J. Reaction of Ph₂P(CH₂)_nPPh₂ (n = 1, 3, 5) with elemental tellurium and comparison with members of even-numbered series. Inorganica Chimica Acta 443 (2016) 230-234. DOI:10.1016/j.ica.2016.01.015

• Křikavová, R.; Vančo, J.; Trávníček, Z.; Buchtík, R.; Dvořák, Z. Copper(II) quinolinonato-7-carboxamido complexes as potent antitumor agents with broad spectra and selective effects. RSC Advances 6 (2016) 3899-3909. DOI:10.1039/C5RA22141B

• Nemec, I.; Herchel, R.; Trávníček, Z.; Šilha, T. Field-induced slow relaxation of magnetization in dinuclear and trinuclear CoIII/MnIII complexes. RSC Advances 6 (2016) 3074-3083. DOI:10.1039/c5ra23922b

• Altaf, M.; Isab, A. A.; Vančo, J.; Dvořák, Z.; Trávníček, Z.; Stoeckli-Evans, H. Synthesis, characterization and in vitro cytotoxicity of gold(III) dialkyl/diaryldithiocarbamato complexes. RSC Advances 5 (2015) 81599-81607. DOI:10.1039/C5RA15123F

• Jeremias, L.; Nečas, M.; Moravec, Z.; Trávníček, Z.; Novosad, J. Syntheses and X-ray structures of heteroleptic octahedral Mn(II)-xanthato complexes involving N-donor ligands. Journal of Coordination Chemistry 68 (2015) 4242-4254. DOI:10.1080/00958972.2015.1102228

• Mathivathanan, L.; Al-Ameed, K.; Lazarou, K.; Trávníček, Z.; Sanakis, Y.; Herchel, R.; McGrady, J. E.; Raptis, R. G. A trigonal prismatic Cu6-pyrazolato complex containing a small m₆-F ligand. Dalton Transactions 44 (2015) 20685-20691. DOI:10.1039/C5DT03892H

• Štarha, P; Hanousková, L; Trávníček, Z. Organometallic half-sandwich dichloridoruthenium(II) complexes with 7-azaindoles: synthesis, characterization and elucidation of their anticancer inactivity against A2780 cell line. PLoS ONE 10 (2015) e0143871. DOI:10.1371/journal.pone.0143871

• Massoud, S. S.; Junk, T.; Louka, F. R.; Herchel, R.; Trávníček, Z.; Fischer, R. C.; Mautner, F. A. Synthesis, structure and magnetic characterization of dinuclear copper(II) complexes bridged by bicompartmental phenolate. RSC Advances 5 (2015) 87139-87150. DOI: 10.1039/C5RA19358C

• Kašpárková, J.; Kostrhunová, H.; Nováková, O.; Křikavová, R.; Vančo, J.; Trávníček, Z.; Brabec, V. A Photoactivatable Platinum(IV) Complex Targeting Genomic DNA and Histone Deacetylases. Angewandte Chemie International Edition 54 (2015) 14478-14482. DOI:10.1002/anie.201506533

• Štarha, P.; Dvořák, Z.; Trávníček, Z. Highly and Broad-Spectrum In Vitro Antitumor Active cis-Dichloridoplatinum(II) Complexes with 7-Azaindoles. PLoS ONE 10 (2015) e0136338. DOI:10.1371/journal.pone.0136338

• Herchel, R.; Nemec, I.; Machata, M.; Trávníček, Z. Experimental and Theoretical Investigations of Magnetic Exchange Pathways in Structurally Diverse Iron(III) Schiff-Base Complexes. Inorganic Chemistry 54 (2015) 8625-8638. DOI:10.1021/acs.inorgchem.5b01271

• Nemec, I.; Marx, R.; Herchel, R.; Neugebauer, P.; van Slageren, J.; Trávníček, Z. Field-induced slow relaxation of magnetization in a pentacoordinate Co(II) compound [Co(phen)(DMSO)Cl₂]. Dalton Transactions 44 (2015) 15014-15021. DOI:10.1039/C5DT02162F

• Billik, P.; Antal, P.; Gyepes, R. Product of dissolution of V2O5 in the choline chloride–urea deep eutectic solvent. Inorganic Chemistry Communications 60 (2015) 37-40. DOI:10.1016/j.inoche.2015.07.030

• Massoud, S.S.; Junk, T.; Herchel, R.; Trávníček, Z.; Mikuriya, M.; Fischer, R.C.; Mautner, F.A. Structural characterization of ferromagnetic bridged-acetato and -dichlorido copper(II) complexes based on bicompartmental 4-t-butylphenol. Inorganic Chemistry Communications 60 (2015) 1-3. DOI:10.1016/j.inoche.2015.07.010

• Gáliková, J.; Trávníček, Z. Structural Diversity of Copper(II) Complexes with 
  9-Deazahypoxanthine and Their in VitroSOD-Like Activity. International Journal of Molecular Sciences 16 (2015) 15954-15970. DOI:10.3390/ijms160715954

• Nemec, I.; Herchel, R.; Trávníček, Z. Suppressing of slow magnetic relaxation in tetracoordinate Co(II) field-induced single-molecule magnet in hybrid material with ferromagnetic barium ferrite. Scientific Reports 5 (2015) 10761. DOI:10.1038/srep10761

• Gáliková, J.; Hošek, J.; Trávníček, Z. Synthesis, X-ray crystal structure and biological evaluation of zinc(II)-dichlorido complexes with 9-deazahypoxathine derivatives. Inorganica Chimica Acta 434 (2015) 67-73. DOI:10.1016/j.ica.2015.05.013

• Nemec, I.; Herchel, R.; Svoboda, I.; Boča, R.; Trávníček, Z. Large and negative magnetic anisotropy in pentacoordinate mononuclear Ni(II) Schiff base complexes. Dalton Transactions 44 (2015) 9551-9560. DOI:10.1039/c5dt00600g

• Vančo, J.; Trávníček, Z.; Kozák, O.; Boča, R. Structural, Magnetic and Luminescent Properties of Lanthanide Complexes with N-Salicylideneglycine. International Journal of Molecular Sciences 16 (2015) 9520-9539. DOI:10.3390/ijms16059520

• Štarha, P.; Trávníček, Z.; Dvořák, Z.; Radošová-Muchová, T.; Prachařová, J.; Vančo, J.; Kašpárková, J. Potentiating Effect of UVA Irradiation on Anticancer Activity of Carboplatin Derivatives Involving 7-Azaindoles. PLoS ONE 10 (2015) e0123595. DOI:10.1371/journal.pone.0123595

• Drahoš, B.; Herchel, R.; Trávníček, Z. Structural, Magnetic, and Redox Diversity of First-Row Transition Metal Complexes of a Pyridine-Based Macrocycle: Well-Marked Trends Supported by Theoretical DFT Calculations. Inorganic Chemistry 54 (2015) 3352-3369. DOI:10.1021/ic503054m

• Křikavová, R.; Hanousková, L.; Dvořák, Z.; Trávníček, Z. Dichlorido-platinum(II) complexes with kinetin derivatives as promising cytotoxic agents avoiding resistance of cancer cells: Contrasting results between cisplatin and oxaliplatin analogues. Polyhedron 90 (2015) 7-17. DOI:10.1016/j.poly.2015.01.033

• Nemec, I.; Herchel, R.; Trávníček, Z. The relationship between the strength of hydrogen bonding and spin crossover behaviour in a series of iron(III) Schiff base complexes. Dalton Trans. 44 (2015) 4474-4484. DOI:10.1039/C4DT03400G 

• Massoud, S. S.; Spell, M.; Ledet, C. C.; Junk, T.; Herchel, R.; Fischer, R.; Trávníček, Z.; Mautner, F. A. Magnetic and Structural Properties of Dinuclear Singly Bridged-Phenoxido Metal(II) Complexes. Dalton Transactions 44 (2015) 2110-2121. DOI:10.1039/C4DT03508A

• Masárová, P.; Zoufalý, P.; Moncol, J.; Nemec, I.; Pavlik, J.; Gembický, M.; Trávníček, Z.; Boča, R.; Šalitroš, I. Spin crossover and high spin electroneutral mononuclear iron(III) Schiff base complexes involving terminal pseudohalido ligands. New Journal of Chemistry 39 (2015) 508-519. DOI:10.1039/c4nj01363h

• Štarha, P.; Smola, D.; Tuček, J.; Trávníček, Z. Efficient Synthesis of a Maghemite/Gold Hybrid Nanoparticle System as a Magnetic Carrier for the Transport of Platinum-Based Metallotherapeutics. International Journal of Molecular Sciences 16 (2015) 2034-2051. DOI:10.3390/ijms16012034

• Vančo, J.; Šindelář, Z.; Dvořák, Z.; Trávníček, Z. Iron-salophen complexes involving azole-derived ligands: A new group of compounds with high-level and broad-spectrum in vitro antitumor activity. Journal of Inorganic Biochemistry 142 (2015) 92-100. DOI:10.1016/j.jinorgbio.2014.10.002
• Vančo, J.; Gáliková, J.; Hošek, J.; Dvořák, Z.; Paráková, L.; Trávníček, Z. Gold(I) Complexes of 9-Deazahypoxanthine as Selective Antitumor and Anti-Inflammatory Agents. PLoS ONE 9 (2014) e109901. DOI:10.1371/journal.pone.0109901
• Nemec, I.; Herchel, R.; Šilha, T.; Trávníček, Z. Towards a better understanding of magnetic exchange mediated by hydrogen bonds in Mn(III)/Fe(III) salen-type supramolecular dimers. Dalton Transactions 43 (2014) 15602-15616. DOI:10.1039/C4DT02025A
• Čajan, M.; Trávníček, Z. Impact of solvent models and van der Waals corrections on DFT geometric and ⁵⁷Fe Mössbauer parameters of trans-[FeCl₂(iPrOH)₄]. Inorganica Chimica Acta 423A (2014) 369-372. DOI:10.1016/j.ica.2014.08.042
• Křikavová, R.; Hošek, J.; Vančo, J.; Hutyra, J.; Dvořák, Z.; Trávníček, Z. Gold(I)-Triphenylphosphine Complexes with Hypoxanthine-Derived Ligands: In Vitro Evaluations of Anticancer and Anti-Inflammatory Activities. PLoS ONE 9 (2014) e107373. DOI:10.1371/journal.pone.0107373
• Trávníček, Z.; Buchtík, R.; Nemec, I. Novel Schiff Bases Based on the Quinolinone Skeleton: Syntheses, X-ray Structures and Fluorescent Properties. Molecules 19 (2014) 13509-13525. DOI:10.3390/molecules190913509
• Štarha, P.; Trávníček, Z.; Popa, I.; Dvořák, Z. Synthesis, Characterization and In Vitro Antitumor Activity of Platinum(II) Oxalato Complexes Involving 7-Azaindole Derivatives as Coligands. Molecules 19 (2014) 10832-10844. DOI:10.3390/molecules190810832
• Raptis, R.; Zueva, E.; Herchel, R.; Borshch, S. A.; Govor, E. V.; Sameera, W. M. C.; McDonald, R.; Singleton, J.; Krzystek, J.; Travnicek, Z.; Sanakis, Y.; McGrady, J. E. Double exchange in a mixed-valent octanuclear iron cluster, [Fe8(m4-O)4(m-4-Cl-pz)12Cl4]. Dalton Transaction 43 (2014) 11269-11276. DOI:10.1039/C4DT00020J
• Herchel, R.; Váhovská, L.; Potočňák, I.; Trávníček, Z. Slow Magnetic Relaxation in Octahedral Cobalt(II) Field-Induced Single-Ion Magnet with Positive Axial and Large Rhombic Anisotropy. Inorganic Chemistry 53 (2014) 5896-5898. DOI:10.1021/ic500916u
• Gáliková, J.; Trávníček, Z. Effect of different reaction conditions on the structural diversity of zinc(II) complexes with 9-deazahypoxanthine. Polyhedron 79 (2014) 269-276. DOI:10.1016/j.poly.2014.05.008
• Gusev, A. N.; Nemec, I.; Herchel, R.; Bayjyyev, E.; Nyshchimenko, G. N.; Aleksandrov, G. G.; Eremenko, I. L.; Trávníček, Z.; Hasegawa, M.; Linert, W. Versatile coordination modes of bis[5-(2-pyridine-2-yl)-1,2,4-triazole-3-yl]alkanes in Cu(II) complexes. Dalton Transactions 43 (2014) 7153-7165. DOI:10.1039/C4DT00462K
• Štarha, P.; Popa, I.; Trávníček, Z. Platinum(II) Oxalato Complexes Involving Adenosine-Based N-Donor Ligands: Synthesis, Characterization and Cytotoxicity Evaluation. Molecules 19 (2014) 3832-3847. DOI:10.3390/molecules19033832
• Nováková, O.; Lišková, B.; Vystrčilová, J.; Suchánková, T.; Vrána, O.; Štarha, P.; Trávníček, Z.; Brabec, V. Conformation and recognition of DNA damaged by antitumor cis-dichlorido platinum(II) complex of CDK inhibitor bohemine. European Journal of Medicinal Chemistry 78 (2014) 54-64. DOI:10.1016/j.ejmech.2014.03.041
• Buchtík, R.; Nemec, I.; Trávníček, Z. A zinc(II) quinolinone complex (Et3NH)[Zn(qui)Cl2]: Synthesis, X-ray structure, spectral properties and in vitro cytotoxicity. Journal of Molecular Structure 1060 (2014) 42-48. DOI:10.1016/j.molstruc.2013.12.050
• Štarha, P.; Hošek, J.; Vančo, J.; Dvořák, Z.; Suchý Jr., P.; Popa, I.; Pražanová, G.; Trávníček, Z. Pharmacological and Molecular Effects of Platinum(II) Complexes Involving 7-Azaindole Derivatives. PLoS ONE 9 (2014) e90341. DOI:10.1371/journal.pone.0090341
• Křikavová R.; Hošek J.; Suchý P.; Vančo J.; Trávníček Z. Diverse in vitro and in vivo anti-inflammatory effects of trichlorido-gold(III) complexes with N6-benzyladenine derivatives. Journal of Inorganic Biochemistry 134 (2014) 92-99. DOI:10.1016/j.jinorgbio.2014.02.002
• Štarha P.; Stavárek M.; Tuček J.; Trávníček Z. 4-Aminobenzoic Acid-Coated Maghemite Nanoparticles as Potential Anticancer Drug Magnetic Carriers: A Case Study on Highly Cytotoxic Cisplatin-Like Complexes Involving 7-Azaindoles. Molecules 19 (2014) 1622-1634. DOI:10.3390/molecules19021622
• Pastorek R.; Štarha P.; Drahoš B.; Trávníček Z. Effect of diverse solvents on the composition and structure of mixed-ligand nickel(II) dithiocarbamates: [NiX(ndtc)(PPh3)]. Polyhedron 69 (2014) 174-180. DOI:10.1016/j.poly.2013.11.041

• Hošek, J.; Vančo, J.; Štarha, P.; Paráková, L.; Trávníček, Z. Effect of 2-Chloro-Substitution of Adenine Moiety in Mixed-Ligand Gold(I) Triphenylphosphine Complexes on Anti-Inflammatory Activity: The Discrepancy between the In Vivo and In Vitro Models. PLoS ONE 8 (2013) e82441. DOI:10.1371/journal.pone.0082441
• Dvořák, Z.; Novotná, A.; Vančo, J.; Trávníček, Z. Influence of gold(I) complexes involving adenine derivatives on major drug–drug interaction pathway. Toxicology in Vitro 27 (2013) 2331–2334. DOI:10.1016/j.tiv.2013.10.008
• Šilha, T.; Čajan, M.; Trávníček, Z. Investigation of Ag(I) complexes involving 6-(benzylamino)purine derivatives. Monatshefte für Chemie 144 (2013) 1797-1806. DOI: 10.1007/s00706-013-1078-4
• Drahoš, B.;  Trávníček, Z. Synthesis of a Versatile Building Block Combining Cyclen-derivative DO3A with a Polyamine via a Rigid Spacer. Molecules 18 (2013) 13940-13956. DOI:10.3390/molecules181113940
• Trávníček, Z.; Štarha, P.; Pastorek, R. Synthesis and X-ray structure of nickel(II) benzylpiperazinedithiocarbamate complex [Ni(bpdtc)(PPh₃)₂]ClO₄.PPh₃. Journal of Molecular Structure 1049 (2013) 22-26. DOI:10.1016/j.molstruc.2013.06.021
• Nemec, I.; Šilha, T.; Herchel, R.; Trávníček, Z. Investigation of Magnetic Exchange Pathways in Heterotrinuclear Manganese(III) Schiff Base Complexes Involving Tetrathiocyanidoplatinate(II) Bridges. European Journal of Inorganic Chemistry (2013) 5781-5789. DOI:10.1002/ejic.201301031
• Herchel, R.; Trávníček, Z. 5-Aminotetrazole induces spin crossover in iron(III) pentadentate Schiff base complexes: experimental and theoretical investigations. Dalton Transactions 42 (2013) 16233–16438. DOI:10.1039/C3DT52301B
• Nemec I.; Zoufalý P.; Herchel R.; Trávníček Z. Cobalt(III) Schiff-base cyanido complex usable as a ligand in preparation of heterobimetallic Co(III)–Fe(III) building blocks. Inorganic Chemistry Communications 35 (2013) 50-53. DOI:10.1016/j.inoche.2013.05.026
• Štarha P.; Popa I.; Trávníček Z.; Vančo J. N6-Benzyladenosine Derivatives as Novel N-Donor Ligands of Platinum(II) Dichlorido Complexes. Molecules 18 (2013) 6990-7003. DOI:10.3390/molecules18066990
• Hošek J.; Novotná R.; Babula P.; Vančo J.; Trávníček Z. Zn(II)-Chlorido Complexes of Phytohormone Kinetin and Its Derivatives Modulate Expression of Inflammatory Mediators in THP-1 Cells. PLoS ONE 6 (2013) e65214. DOI:10.1371/journal.pone.0065214
• Šilha T.; Nemec I.; Herchel R.; Trávníček Z. Structural and magnetic characterizations of the first manganese(III) Schiff base complexes involving hexathiocyanidoplatinate(IV) bridges. CrystEngComm 15 (2013) 5351-5358. DOI:10.1039/C3CE40524A
• Muchová T.; Prachařová J.; Štarha P.; Olivová R.; Vrána O.; Benešová B.; Kašpárková J.; Trávníček Z.; Brabec V. Insight into the toxic effects ofcis-dichloridoplatinum(II) complexes containing 7-azaindole halogeno derivatives in tumor cells. Journal of Biological Inorganic Chemistry 18 (2013) 579-589. DOI:10.1007/s00775-013-1003-7
• Trávníček Z.; Zbořil R.; Matiková-Maľarová M.; Drahoš B.; Černák J. Thermal decomposition of [Co(en)₃][Fe(CN)₆]∙2H₂O: Topotactic dehydration process, valence and spin exchange mechanism elucidation. Chemistry Central Journal 7 (2013) 28. DOI:10.1186/1752-153X-7-28

• Nemec, I.; Machata, M.; Herchel, R.; Boča, R.; Trávníček, Z. A new family of Fe₂Ln complexes built from mononuclear anionic Schiff base subunits. Dalton Transactions 41 (2012) 14603-14610. DOI:10.1039/C2DT31809A
• Buchtík R., Trávníček Z., Vančo J. In vitro cytotoxicity, DNA cleavage and SOD-mimic activity of copper(II) mixed-ligand quinolinonato complexes. Journal of Inorganic Biochemistry 116 (2012) 163-171. DOI:10.1016/j.jinorgbio.2012.07.009
• Nemec, I.; Herchel, R.; Šalitroš, I.; Trávníček, Z.; Moncoľ, J.; Fuess, H.; Ruben, M.; Linert, W. Anion driven modulation of magnetic intermolecular interactions and spin crossover properties in an isomorphous series of mononuclear iron(iii) complexes with a hexadentate Schiff base ligand. CrystEngComm 14 (2012) 7015-7024. DOI:10.1039/C2CE25862E
• Štarha, P.; Trávníček, Z.; Popa, A.; Popa, I.; Muchová, T.; Brabec, V. How to modify 7-azaindole to form cytotoxic Pt(II) complexes: Highly in vitro anticancer effective cisplatin derivatives involving halogeno-substituted 7-azaindole. Journal of Inorganic Biochemistry 115 (2012) 57-63. DOI:10.1016/j.jinorgbio.2012.05.006
• Trávníček, Z.; Štarha, P.;Vančo, J.; Šilha, T.; Hošek, J.; Suchý, P.; Pražanová, G. Anti-inflammatory Active Gold(I) Complexes Involving 6-Substituted-Purine Derivatives. Journal of Medicinal Chemistry 55 (2012) 4568-4579. DOI:10.1021/jm201416p
• Čajan, M.; Trávníček, Z. Calculations of 57Fe Mossbauer parameters of mononuclear iron(II) N4 Schiff-base complexes by HF and DFT quantum-chemical approaches. Inorganica Chimica Acta 387 (2012) 412-419. DOI:10.1016/j.ica.2012.02.039
• Drahoš, B.; Lukeš, I.; Tóth, É. Manganese(II) Complexes as Potential Contrast Agents for MRI. European Journal of Inorganic Chemistry (2012) 1975-1986. DOI:10.1002/ejic.201101336
• Dvořák, Z.; Štarha, P.; Šindelář, Z.; Trávníček, Z. Evaluation of in vitro cytotoxicity of one-dimensional chain [Fe(salen)(L)]n complexes against human cancer cell lines. Toxicology in Vitro 26 (2012) 480-484. DOI:10.1016/j.tiv.2012.01.006
• Herchel, R.; Novosád, D.; Trávníček, Z. A dinuclear manganese(II) complex {[Na2(H2O)4Mn2(μ-pmtz)4(NCS)2]•xH2O}n with 5-(pyrimidyl)tetrazolato bridges involved in 1D ladder-like chains: Synthesis, X-ray structure, magnetic properties and DFT calculations. Polyhedron 42 (2012) 50-56. DOI:10.1016/j.poly.2012.04.041
• Klanicová, A; Houck, J.D.; Baran, P.; Trávníček, Z. Synthesis, X-ray structures, properties and SOD-like activity of ternary copper(II) complexes showing the N4O2 coordination with a combination of monodentate and bidentate N-donor ligands.Inorganica Chimica Acta 384 (2012) 47-53. DOI:10.1016/j.ica.2011.11.021
• Lišková, B.; Zerzánková, L.; Nováková, O.; Kostrhunová, H.; Trávníček, Z.; Brabec, V. Cellular Response to Antitumor cis-Dichlorido Platinum(II) Complexes of CDK Inhibitor Bohemine and Its Analogues. Chemical Research in Toxicology 25 (2012) 500-509. DOI:10.1021/tx200525n
• Schütznerová, E.; Popa, I.; Kryštof, V.; Koshino, H.; Trávníček, Z.; Hradil, P.; Cankař, P. Utilization of DmbNHNH2 in the synthesis of amino-substituted 4-((3,5-diamino-1H-pyrazol-4-yl)diazenyl)phenols. Tetrahedron 68 (2012) 3996-4002. DOI:10.1016/j.tet.2012.03.063
• Štarha, P.; Marek, J.; Trávníček, Z. Cisplatin and oxaliplatin derivatives involving 7-azaindole: Structural characterisations.Polyhedron 33 (2012) 404-409. DOI:10.1016/j.poly.2011.11.059
• Novotná, R.; Herchel, R.; Trávníček, Z. Structurally varied Cu(II) complexes involving kinetin and its derivatives: Synthesis, characterization and evaluation of SOD-mimic activity. 

Project of Student Grant Competition at Palacky University Olomouc IGA_PrF_2023_007

• Name: „Studium koordinačních sloučenin vybraných přechodných a vnitřně přechodných kovů V”
• Time period: 1. 3. 2023 – 28. 2. 2024
• Main investigator: doc. Ing. Radovan Herchel, Ph.D.

Project of Student Grant Competition at Palacky University Olomouc IGA_PrF_2022_006

• Name: „Studium koordinačních sloučenin vybraných přechodných a vnitřně přechodných kovů IV”
• Time period: 1. 3. 2022 – 28. 2. 2023
• Main investigator: doc. Ing. Radovan Herchel, Ph.D.

Project of Doctoral Student Grant Competition (DSGC) at Palacky University Olomouc IGRÁČEK 2021-0032:

• Name: „Towards Zero-Field Co(II) Single Ion Magnets”
• Time period: 1. 1. 2022 – 31. 12. 2022
• Main investigator: Mgr. Ondřej František Fellner

U ERDF II CZ.02.2.67/0.0/0.0/18_057/ 0013296  

• Name: „Zkvalitnění studijního prostředí”
• Time period: 1. 1. 2020 – 31. 12. 2022
• Main investigator: Ing. Jiří Přidal

EU ESF II CZ.02.2.69/0.0/0.0/18_056/ 0013259   

• Name: „Moderní výukové metody pro komplexní vzdělávání”
• Time period: 1. 1. 2020 – 31. 12. 2022
• Main investigator: prof. RNDr. Jitka Ulrichová, CSc.

Pregradual II CZ.02.3.68/0.0/0.0/19_068/0015922

• Name: „Zkvalitňování přípravy budoucích učitelů na Univerzitě Palackého v Olomouci”
• Time period: 1. 1. 2020 – 31. 12. 2022
• Coordinator for PřF: Mgr. Vladimír Vaněk, Ph.D.