Solvent mediated vibrational coherence decay: Excited state dynamics study using ultrafast Raman loss spectroscopy
In this talk, we would discuss the influence of solvent dynamics during ultrafast isomerization and proton transfer processes. We have used ultrafast stimulated Raman methodology measuring the Raman loss signals. We have observed that the rate of coherence decay of the exicted state vibrational modes are controlled and mediated by the solvent friction.
Siva Umapathy is a J C Bose fellow, Chairman and professor in the Department of Inorganic & Physical Chemistry and Professor at the Department of Instrumentation & Applied Physics, Indian Institute of Science, Bangalore, India and an Honorary Professor at the department of Chemistry, University of Nottingham, United Kingdom. He secured his PhD from the University of Otago, New Zealand. His major Research interests are Ultrafast Raman Spectroscopy, Resonance Raman Spectroscopy, understanding Molecular Dynamics, and Raman & Infrared microscopy application to biology, medicine and materials research & development of novel instrumentation for detection of chemical and biological materials and medical diagnostics. He has received the SS Bhatnagar Award, C V Raman Young scientist award and Swarna Jayanthi award. He is a Fellow of the Indian Academy of sciences and Fellow of the Royal Society of Chemistry. He is also the Editor of Spectrochimica Acta, Editorial Board Member of, J. Raman Spectroscopy, J. Biophotonics, Chemical Physics, Nature Scientific Reports and Forntier Physics. He is also an advisor board member of Faraday Discussions and current Chairman of the International Steering committee on Raman Spectroscopy. He has over 130 international journal publications and over 200 conference papers.