题目：ELECTRONIC EXCITATION ENERGY TRANSFER IN BIOLOGICAL MACROMOLECULES

时间：2017年4月20日（周四）下午2点

地点：北校区光电所346会议室

报告人：Valeriy M. Yashchuk（Taras Shevchenko National University of Kyiv, Ukraine）

摘要：In this talk, the results on spectral properties of biological macromolecules (DNA, RNA, proteins) and their low-molecular model compounds will be presented and discussed. The investigation involved steady-state, time-resolved and polarization studies of optical absorption, fluorescence, phosphorescence of biomolecules at ambient and low temperatures and allowed us to determine the positions of singlet and triplet electronic energy levels in macromolecules of DNA, RNA and Human Serum Albumin (HSA). The existence of a migration of singlet and triplet excitations in DNA and RNA macromolecules was shown and nature of traps for the migrating excitations was determined. The results on the electronic excitation energy transfer (EEET) in DNA, RNA and HSA macromolecules will be presented and the related inherent functional properties of biological systems will be deliberated, including phenomenon of DNA and RNA self-protection

简历：Prof. Dr. Valeriy M. Yashchuk is a Head of Experimental Physics Department of Taras Shevchenko National University of Kyiv, Kyiv, Ukraine. He holds his Ph.D. and Doctor of Sciences (D.Sc.) degrees in physics from the same university. His scientific expertise lies in a field of area of photonics of organic media, he has published more than 250 peer-reviewed articles in this and related domains.

Prof. Yashchuk’s current research interests include:

• Electronic excitation energy transfer in macromolecules

• Organic light emitting diodes, solar photovoltaics

• Processes of aging and degradation of organic systems

• Photophysics of biological objects

• Photoinduced therapy of cancer and other diseases.