伴随着分子内电荷分离的分子内转动模型的时间分辨荧光光谱研究  

TIME-RESOLVED SPECTROSCOPY STUDY ON THE MODEL OF INTRAMOLECULAR ROTATION WITH INTRAMOLECULAR CHARGE SEPARATION

作　　者：戚继发 修光宇 郭础[1] 

机构地区：[1]北京理工大学应用物理系

出　　处：《高速摄影与光子学》1991年第1期114-119,共6页

摘　　要：本文采用时间分辨荧光光谱方法,考查了两种7-胺基香豆类素衍生物分子在不同溶剂中的荧光辐射弛豫过程,研究了环境因素对伴随着分子内电荷转移的分子内转动激发态(TICT)弛豫过程的影响。结果说明TICT态是非刚性香豆素分子激发态无辐射弛豫路径之一,这一过程受到环境介质的极性、粘度和温度的影响。并指出了在考虑粘度影响时,须对DSE理论进行修正,同时提出了TICT态存在位垒的观点。The flurescent decay dynamics of two kinds 7-aminocoumarin derivative molecu-lars in different solvents was investigated by the time-resolved spectroscopy. The environmental effects on the relaxation of the intramolecular rotation with intramolecular charge transfer excited state (TICT) were studied. The results show that TICT is a nonrediative relaxation channel of the excited state of coumarin molecular with unrigid structure, and it was inflenced by the environmental properties (polarity, viscosity and temperature), we found that the Debye-Stokes-Einstein theory needed modifying to a energy barrier of TICT state which is intramolecular and senvironrnents dependent.

关 键 词：荧光光谱 溶剂效应 分子 电荷 转动 

分 类 号：O561.1[理学—原子与分子物理]