EXCITED-STATE RELAXATION OF CROWN-ETHER STYRYL DYES - PHOTOISOMERIZATION

被引：6
|
作者：
ALFIMOV, MV
KAMALOV, VF
STRUGANOVA, IA
YOSHIHARA, K
机构：
[1] INST MOLEC SCI,OKAZAKI,AICHI 444,JAPAN
[2] RUSSIAN ACAD SCI,INST CHEM PHYS,DEPT PHOTOCHEM,MOSCOW 117977,USSR
来源：
CHEMICAL PHYSICS LETTERS | 1992年 / 195卷 / 2-3期
关键词：
D O I：
10.1016/0009-2614(92)86146-9
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：
Photophysical processes are studied in a new class of dyes containing a chromophoric part and a crown ether part (crown ether styryl dyes). Photoisomerization is proposed to be the main channel of nonradiative decay of the singlet excited electronic state. The temperature dependence of fluorescence decay was measured and the lifetime of the trans-isomer in excited electronic state was found to decrease with temperature in ethanol solutions. Isomerization around the C = C bond is discussed, and the activation barrier is estimated as 2.3 and 1.5 kcal/mol for the two crown ether styryl dyes studied.
引用
收藏
页码：262 / 266
页数：5
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