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第46回CMS(計算分子科学)セミナー

演 題 「Coupling of environmental and electronic dynamics in excited state relaxation」
日 時 2009年07月01日(水) 15:00
講演者 Prof. Rossky J. Peter Director, Center for Computational Molecular Sciences Institute for Computational Engineering and Sciences University of Texas at Austin, Austin, TX USA
場 所

分子科学研究所 研究棟201セミナー室

概 要

Practicing chemists routinely employ classical mechanical modeling of molecular systems, supplemented by ground state electronic structure calculations, as a means to elucidate likely chemical structures and mechanisms underlying experimental observation. However, electronic excited state dynamics and the motion of light nuclei in a condensed phase require both a quantum mechanical treatment and an account of the strong coupling between the dynamical evolution of the environment and that of the molecular quantum states.
In this presentation, I will discuss practical theoretical and computational approaches to describing these effects for solvated molecular solutes.
The important role of solvent environmental motions in modulating the molecular electronic energy and the critical role of high frequency molecular vibrational contributions to vibronic relaxation rates will be emphasized. The issues will be illustrated for the hydrated electron and the impact on electronic excited state dynamics will be examined for the excited state electron transfer dynamics i n a solvated protein and an experimentally studied dye, betaine-30.

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平田 文男(理論・計算分子科学研究領域)