高圧下の光異性化反応に対するダイナミックな溶媒効果

概要

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Photoisomerization reactions, which usually involve large amplitude motion of a bulky group twisting around a molecular axis, are often used to test theories of dynamic solvent effects, since the rate of isomerization depends critically on the frictional forces exerted by the solvent molecules. The photoreaction can be initiated with a short pulse of light, and their progress can be monitored by similarly fast time - resolved techniques. The experimental results of the solvent viscosity effect have been analyzed in terms of the Kramers theory or its extended theories developed more recently. In this article the theoretical implication of the dynamic solvent effect is briefly looked into, and its application to some recent experimental results for photoisomerization reactions studied by high - pressure method is reviewed.
日本高圧力学会の論文