Vladimir Kokozay




Vladimir Kokozay

POSITION
Leading Researcher

WORK EXPERIENCE
1981–1986
Junior Researcher
Taras Shevchenko National University of Kyiv, Kyiv (Ukraine)

1986–1988
Senior Researcher
Taras Shevchenko National University of Kyiv, Kyiv (Ukraine)

1989–2010
Head of Laboratory
Taras Shevchenko National University of Kyiv, Kyiv (Ukraine)

1997–2006
Vice Dean responsible for scientific research
Taras Shevchenko National University of Kyiv, Kyiv (Ukraine)

2011–Present
Leading Researcher
Taras Shevchenko national University of Kyiv, Kyiv (Ukraine)

EDUCATION AND TRAINING


1981
Ph.D., Inorganic Chemistry
Taras Shevchenko National University of Kyiv, Kyiv (Ukraine)

1994
Dr.Hab. Inorganic Chemistry
Taras Shevchenko National University of Kyiv, Kyiv (Ukraine)

1999
Professor of Inorganic Chemistry
Taras Shevchenko National University of Kyiv, Kyiv (Ukraine)

Direct synthesis of metal complexes

Research Fields:
Chemistry

Previous and Current Research

Professor Kokozay leads a research group at the Laboratory “Synthesis and investigation of inorganic compounds and materials for new technique”. He published more than 270 original papers and review articles, 117 patents and is a co-author of 2 scientific books. The Kokozay’s group consists of 4 Senior researchers, 1 Researcher, 1 Junior Researcher and 4 PhD students as well as about 10 Bachelor and Master students

An unconventional approach to the preparation of metal complexes (Direct synthesis), developed by the group, offers a one-pot synthesis of such compounds using metal powders or metal oxides as starting materials. An important advantage of Direct synthesis is the possibility to obtain complexes that are often inaccessible by traditional synthetic routes. The team has a huge experience in synthesis of metal complexes and their characterization by various physico-chemical methods.

Current research interests are focused on

• development of synthetic procedures based on direct synthesis to obtain 1) heterometallic complexes of transition metals with Schiff base ligands generated in situ via condensation of aromatic aldehydes and their derivatives with compounds containing primary amino groups; 2) hybrids based on polyoxometalate anions (e.g. V10O286-, PMo12O403-, P2Mo3O186-, P2Mo5O236-, V2Mo6O248-, PMo8V4O407-) via oxidative dissolution of metal powders (Cu, Co, Mn) in liquid phase in the presence of organic ligands;

• characterization of novel compounds by elemental analysis, UV-Vis, IR, EPR, NMR, Mass spectrometry, thermal analysis, powder and single crystal X-ray diffraction.

Future Projects and Goals

• investigation of functional properties of heterometallic complexes (magnetic properties, catalytic activity, luminescence, photoconductivity of film composites; bioactivity);

• examination of possible applications of obtained complexes as novel multifunctional materials:

  • catalysts of cycloalkanes oxidation;
  • catalysts of water oxidation;
  • photovoltaics;
  • magnetic materials;
  • antiphytoviral and antimicrobial agents.

Methodological and Technical Expertise

Design, synthesis and characterization of heterometallic complexes.

Selected Publications


E.A. Buvaylo, V.N. Kokozay, R.P. Linnik, O.Yu. Vassilyeva, B.W. Skelton.
. Hybrid organic–inorganic chlorozincate and a molecular zinc complex involving the in situ formed imidazo[1,5-a]pyridinium cation: serendipitous oxidative cyclization, structures and photophysical properties.
Dalton Trans. 2015, 44, 13735–13744.

M.V. Pavliuk, V.G. Makhankova, V.N. Kokozay, I.V. Omelchenko, J. Jezierska, A. Thapper, S. Styring.
Structural, magnetic, thermal and visible light-driven water oxidation studies of heterometallic Mn/V complexes.
Polyhedron. 2015, 88. 81–89. 2,057

E.A. Buvaylo, V.N. Kokozay, K. Rubini, O.Yu. Vassilyeva, B.W. Skelton.
Unusual cocrystals made of a Schiff base metal complex and organic molecule – Close-packing vs. hydrogen bond interactions.
J. Mol. Struct. 2014, 1072, 129–136.

D.S. Nesterov, E.N. Chygorin, V.N. Kokozay, V.V. Bon, R. Boča, Y.N. Kozlov, L.S. Shul’pina, J. Jezierska, A. Ozarowski, A.J.L. Pombeiro, G.B. Shul’pin.
Heterometallic CoIII4FeIII2 Schiff Base Complex: Structure, Electron Paramagnetic Resonance, and Alkane Oxidation Catalytic Activity.
Inorg. Chem. 2012, 51, 9110–9122.

E.N. Chygorin, O.V. Nesterova, J. A. Rusanova, V.N. Kokozay, V.V. Bon, R. Boca, A. Ozarowski. Novel Heterometallic
Schiff Base Complexes Featuring Unusual Tetranuclear {CoIII2FeIII2(μ-O)6} and Octanuclear {CoIII4FeIII4(μ-O)14} Cores: Direct Synthesis, Crystal Structures, and Magnetic Properties.
Inorg. Chem. 2012, 51, 386–396.

V.V. Semenaka, , O.V. Nesterova, V.N. Kokozay, V.V. Dyakonenko, R.I. Zubatyuk, O.V. Shishkin, R. Boca, J. Jezierska, A. Ozarowski.
Cr(III)-Cr(III) Interactions in Two Alkoxo-Bridged Heterometallic Zn2Cr2 Complexes Self-Assembled from Zinc Oxide, Reinecke’s Salt, and Diethanolamine.
Inorg. Chem. 2010, 49, 5460–5471.

V.V. Semenaka, , O.V. Nesterova, V.N. Kokozay, V.V. Dyakonenko, O.V. Shishkin, R. Boca, J. Jezierska.
An extremely rare example of asymmetric tetranuclear core {M4(µ3-X)2(µ-X)4} in a novel alkoxo-bridged heterometallic Cr/Cd complex.
Dalton Trans., 2010, 1734–1739.

Contacts


kokozay@univ.kiev.ua