INTRAMOLECULAR CHARGE-TRANSFER IN AMINOBENZONITRILES - REQUIREMENTS FOR DUAL FLUORESCENCE

被引：253
|
作者：
ZACHARIASSE, KA
VONDERHAAR, T
HEBECKER, A
LEINHOS, U
KUHNLE, W
机构：
[1] Max-Planck-Institut für biophysikalische Chemie, D-3400, Göttingen
来源：
PURE AND APPLIED CHEMISTRY | 1993年 / 65卷 / 08期
关键词：
D O I：
10.1351/pac199365081745
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Dual fluorescence and intramolecular charge transfer (ICT) are observed with aminobenzonitriles when two excited state levels (S1 and S2(CT) in DMABN) have an energy gap sufficiently small for vibronic coupling: a solvent-induced pseudo-Jahn-Teller effect. It is argued that the N-inversion of the amino group acts as a promoting mode. These conclusions are based on a comparison of absorption spectra and photostationary and time-resolved fluorescence data. Dual fluorescence is also observed with MMD, in which the dimethylamino group is twisted towards a perpendicular configuration with respect to the phenyl ring.
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页码：1745 / 1750
页数：6
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