Stilbene-like molecules: Sulfur- and selenium-heterosubstituted indole[3,2-b]indoles

被引:8
作者
Dobrin, S
Kaszynski, P
Waluk, J
机构
[1] POLISH ACAD SCI,INST PHYS CHEM,PL-01224 WARSAW,POLAND
[2] VANDERBILT UNIV,DEPT CHEM,NASHVILLE,TN 37235
基金
美国国家科学基金会;
关键词
indole[3,2-b] indoles; selenium; stilbene; sulfur; PHOTOPHYSICS;
D O I
10.1016/S1010-6030(96)04609-6
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
In a series of molecules based on indole[3,2-b] indole, the sulfur and selenium heteroderivatives exhibit signs of deviation from planarity on excitation. A simple model is proposed to explain the photophysical behavior. For stilbene-like molecules, the distortion can be treated in terms of the torsional motion about the central C-C bond. The torsion may facilitate spin-orbit coupling between states of pi pi* character. Analysis of the electronic matrix elements and Franck-Condon factors responsible for the radiative and non-radiative transitions leads to predictions concerning the correlations between the different rate constants, which are in agreement with the experimental data. (C) 1997 Elsevier Science S.A.
引用
收藏
页码:149 / 152
页数:4
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