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Dr Valery Kozhevnikov

Senior Lecturer

Department: Applied Sciences

After his PhD (2000), in synthetic organic chemistry at Urals State University, Ekaterinburg, Dr Valery N. Kozhevnikov chose the area of luminescent materials to further his career and has already successfully taken part in many interdisciplinary projects.

After his PhD (2000), in synthetic organic chemistry at Urals State University, Ekaterinburg, Dr Valery N. Kozhevnikov chose the area of luminescent materials to further his career and has already successfully taken part in many interdisciplinary projects. He took several postdoctoral fellowships: firstly an Alexander von Humboldt Fellowship at the Universität Regensburg in the group of Professor Burkhard König, (luminescent chemosensors), followed by EU Marie Curie Incoming International Fellowship in the group of Professor Duncan W. Bruce at York University (phosphorescent liquid crystals) and later in the group of Professor Martin Bryce at Durham University (phosphorescent iridium(III) cyclometallated complexes). In September 2009 he was appointed as a lecturer at Northumbria University and in 2012 was promoted to a Senior Lecturer. He is beginning to establish his own independent research group working in the area of luminescent metal complexes. His current research is focused on design of new phosphorescent metal complexes by exploiting concepts of supramolecular chemistry, and is funded by Northumbria university, EPSRC and industrial partners.

Qualifications

BSc, MSc, PhD

Research Themes and Scholarly Interests

Dr Kozhevnikov's research contributes to the fields of organic and coordination chemistry, luminescent chemical sensing, liquid crystals and new photonic materials. Kozhevnikovcontributed to the development of simple, inexpensive methodology for the synthesis of highly functionalised pyridines. The principle is that instead of making a pyridine ring by traditional pyridine chemistry, first 1,2,4-triazines are constructed and functionalised and then the triazines are converted into pyridines by cycloaddition reactions. It is a straightforward principle, yet provides a diversity of possible structures and gives access to functional molecules. This methodology has been successfully applied to a number of interdisciplinary projects, including recent studies of phosphorescent cyclometallated Pt(II) and Ir(III) complexes.

Dr Kozhevnikov’s current research projects deal with polynuclear cyclometallated Pt(II) and Ir(III) complexes. These highly luminescent molecules are suitable for a variety of applications ranging from bioimaging to energy efficient lighting and displays.

New luminescent molecules are targeted which have two or more cyclometallated metal centres within one rigid integrated lumonophore. These large conjugated systems have efficient phosphorescence in the red and extending far into the infrared region of the spectrum.

Molecules of this kind are of interest in supramolecular chemistry as building blocks in assembly of new metallosupramolecular architectures, which provide controlled geometry and attractive luminescent properties. In addition, the molecules often give rise to many interesting effects arising from intermolecular pi-pi and Pt-Pt-centred interactions suggesting development of chemical sensors and stimuli responsive materials.

Sponsors and Collaborators

Kozhevnikov group benefits from collaboration with a number of research groups: Professor J. A. Gareth Williams, Durham University (luminescent materials), Professor Dmitry Kozhevnikov, Ural Federal University and Dr. Marcus Durrant, Northumbria University (computational studies),   Professor Duncan W. Bruce, York University (liquid crystals), Dr. Frank Lewis, Northumbria University (actinide extraction), Dr Rosemary Bass, Northumbria University (anticancer activity), Dr. Dr Guillaume Zoppi and Dr Neil Beattie, Northumbria University (photovoltaic materials).

Current/Recent Projects

EPSRC (EP/I014942/1) Rigid Polynuclear Cyclometallated Pt(II) / Ir(III) Complexes: Towards Supramolecular Triplet Emitters

Key Publications

Culham, S.; Lanoë, P.-H.; Whittle, V. L.; Durrant, M. C.; Williams, J. A. G.; Kozhevnikov,V. N., Highly Luminescent Dinuclear Platinum(II) Complexes Incorporating Bis-Cyclometallating Pyrazine-Based Ligands: A Versatile Approach to Efficient Red Phosphors. Inorganic Chemistry 2013, 52 (19), 10992-11003.

Kozhevnikov, V. N.; Durrant, M. C.; Williams, J. A. G., Highly Luminescent Mixed-Metal Pt(II)/Ir(III) Complexes: Bis-Cyclometalation of 4,6-Diphenylpyrimidine As a Versatile Route to Rigid Multimetallic Assemblies. Inorganic Chemistry 2011, 50 (13), 6304-6313.

Kozhevnikov, V. N.; Dahms, K.; Bryce, M. R., Nucleophilic Substitution of Fluorine Atoms in 2,6-Difluoro-3-(pyridin-2-yl)benzonitrile Leading to Soluble Blue-Emitting Cyclometalated Ir(III) Complexes. Journal of Organic Chemistry 2011, 76 (12), 5143-5148.

Santoro, A.; Prokhorov, A. M.; Kozhevnikov, V. N.; Whitwood, A. C.; Donnio, B.; Williams, J. A. G.; Bruce, D. W., Emissive Metallomesogens Based on 2-Phenylpyridine Complexes of Iridium(III). Journal of the American Chemical Society 2011, 133 (14), 5248-5251.

Kozhevnikov, D. N.; Kozhevnikov, V. N.;  Shafikov, M. Z.; Prokhorov, A. M.; Bruce, D. W.; Gareth Williams, J. A., Phosphorescence vs Fluorescence in Cyclometalated Platinum(II) and Iridium(III) Complexes of (Oligo)thienylpyridines. Inorganic Chemistry 2011, 50 (8), 3804-3815.

Kozhevnikov, V. N.; Donnio, B.; Bruce, D. W., Phosphorescent, terdentate, liquid-crystalline complexes of platinum(II): Stimulus-dependent emission. Angewandte Chemie-International Edition 2008, 47 (33), 6286-6289.

To view my Northumbria Research Link page click here


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