RADIATIONLESS TRANSITIONS IN SUBSTITUTED BENZOPYRYLIUM DYES - COMPETING ADIABATIC PHOTOREACTIONS TOWARDS NONRADIATIVE FUNNELS

被引:23
作者
HAUCKE, G
CZERNEY, P
STEEN, D
RETTIG, W
HARTMANN, H
机构
[1] TECH UNIV BERLIN,IWAN N STRANSKI INST PHYS & THEORET CHEM,W-1000 BERLIN 12,GERMANY
[2] TH MERSEBURG,FACHBEREICH CHEM,O-4200 MERSEBURG,GERMANY
来源
BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1993年 / 97卷 / 04期
关键词
ELECTRON TRANSFER; FLUORESCENCE; PHOTOCHEMISTRY; QUANTUM MECHANICS;
D O I
10.1002/bbpc.19930970405
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
A wide variety of substituted flavylium salts and bridged derivatives are compared with respect to their fluorescence quantum yields and lifetimes. The dependence of the nonradiative decay rate constant on substitution pattern, on twisting possibility and on solvent polarity could be explained by the formation of non-fluorescent Twisted Intramolecular Charge Transfer (TICT) states. In some dyes, two different TICT channels compete. Molecules-in-molecules (MIM) calculations are used to analyze and predict different TICT formation possibilities.
引用
收藏
页码:561 / 570
页数:10
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