高等学校化学学报Issue(4)：654-659,6.DOI:10.7503/cjcu20141071
纳米腔限制环境下2-（2-羟苯基）苯并噻唑的质子转移
Excited-state Proton Transfer of 2-(2-Hydroxyphenyl) benzothiazole in the Confined Nanocavity
摘要
Abstract
Proton transfer as one of the basic reaction exists in a large variety of chemical and biochemical process. And the organic molecules that exist the proton transfer process offten existence potential applications in biological and chemical industry. In this work, the supramolecular interaction of 2-( 2-hydroxyphenyl ) benzothiazole(HBT) with different concentrations cucurbit[7]uril(CB7) and its influences on the exited state intramolecular proton transfer( ESIPT) of HBT were studied with stead-state and transient fluorescence spectra in the different solvents. Furthermore, the inclusion ratio of CB7 and HBT were obtained according to Benesi-Hildebrand equation based on the fluorescence data. The results show that the stoichiometric ratio 1:1 host-guest complex of CB7 with HBT is formed in the N,N-dimethyeformamide( DMF) or dichloromethane solution, and the proton transfer of HBT is very sensitive to solvent. When the concentration of CB7 was increased, the fluorescence lifetime and quantum yield of HBT were decreased and increased respectively. The phenolic oxy-gen negative ion was formed in DMF, and the ESIPT of HBT was decreased in dichloromethane. The quantum chemical calculations show that CB7 can form the 1:1 HBT@CB7 complexes for the enol or keto tautomer of HBT.关键词
2-(2-羟苯基)笨并噻唑/质子转移/七元瓜环/纳米腔/荧光光谱/量子化学计算Key words
2-( 2-Hydroxyphenyl)benzothiazole/Cucurbit [ 7 ] uril/Proton transfer/Fluorescence spectrum/Quantum chemical calculation分类
化学化工引用本文复制引用
向俊峰,易平贵,于贤勇,陈建,郝艳雷,任志勇..纳米腔限制环境下2-（2-羟苯基）苯并噻唑的质子转移[J].高等学校化学学报,2015,(4):654-659,6.基金项目
国家自然科学基金(批准号:21172066,20971041)和湖南省高校科技创新团队项目(批准号:湘教通[2012]318)资助.覮 Supported by the National Natural Science Foundation of China(Nos.21172066,20971041) and the Hunan University of Science and Technology Innovation Team Projects, China(No.[2012]318) （批准号:21172066,20971041）
