High pressure-controlled intramolecular-twist of flexible molecules in solid polymers

被引：27

作者：

Dreger, ZA

White, JO

Drickamer, HG

机构：

[1] Univ Illinois, Sch Chem Sci, Dept Phys, Urbana, IL 61801 USA

[2] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA

来源：

CHEMICAL PHYSICS LETTERS | 1998年 / 290卷 / 4-6期

关键词：

D O I：

10.1016/S0009-2614(98)00580-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the effect of pressure on fluorescence of two flexible dye molecules of a series of para-substituted benzylidenemalononitriles dissolved in solid poly(methyl methacrylate). Under pressure these molecules exhibit a remarkable increase of intensity and slowing of excited state decay. We show that these changes can be well explained by a kinetic model in which the pressure is assumed to control the barrier for the intramolecular transformation of the flexible molecules in their excited state. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

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页码：399 / 404

页数：6

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