INTRAMOLECULAR CHARGE-TRANSFER IN AMINOBENZONITRILES - REQUIREMENTS FOR DUAL FLUORESCENCE

被引：252

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.

引用

页码：1745 / 1750

页数：6

共 18 条

[1]

CHANDROSS EA, 1976, 6 IUPAC S PHOT AIX P, P53

[2]

DUBEN AJ, 1974, EXCITED STATES, V1, P295

[3] TWISTED INTRAMOLECULAR CHARGE-TRANSFER (TICT) EXCITED-STATES - ENERGY AND MOLECULAR-STRUCTURE [J].