Fluorescence of crystalline 4-(dimethylamino)benzonitrile. Absence of dual fluorescence and observation of single-exponential fluorescence decays

被引：17

作者：

Demeter, A ^{[1
]}

Zachariasse, KA ^{[1
]}

机构：

[1] Max Planck Inst Biophys Chem Spektroskopie & Phot, D-37070 Gottingen, Germany

来源：

CHEMICAL PHYSICS LETTERS | 2003年 / 380卷 / 5-6期

基金：

匈牙利科学研究基金会;

关键词：

D O I：

10.1016/j.cplett.2003.09.073

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：

The fluorescence spectrum of crystals grown from newly synthesized 4-(dimethylamino)benzonitrile (DMABN), measured from 25 down to -112 degreesC, consists of a single emission band originating from a locally excited (LE) state. The fluorescence decay of the DMABN crystals is single exponential at all temperatures investigated. These results show that intramolecular charge transfer (ICT) does not occur in crystalline DMABN. The additional red-shifted emission bands and multiexponential fluorescence decays previously reported for DMABN crystals are attributed to a minor amount of the impurity 4-(dimethylamino)benzaldehyde, the synthetic precursor of commercial DMABN. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：699 / 703

页数：5

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