高等学校化学学报Issue(6)：1219-1223,5.DOI:10.7503/cjcu20130996
光谱法研究七元瓜环作用下2-（2-羟苯基）咪唑并[1,2-a]吡啶的质子转移
Study on Proton Transfer of 2-(2′-Hyhroxyphenyl)imidazo[1,2-a]pyridine with Cucurbit[7]uril by Spectroscopic Methodology
摘要
Abstract
Proton transfer exist in a large variety of chemical and biochemical processes as one of the basic reactions of chemical and biochemical systems. Studies on proton transfer of organic molecules in versatile macrocyclic is necessary, and it can provide some reference to the study of the proton transfer process in the biological system. In this work, the interaction of 2-(2′-hyhroxyphenyl)imidazo[1,2-a]pyridine(HPIP) with versatile macrocyclic, namely, cucurbit[7]uril(CB7) and the effect on the excited state intramolecular proton transfer(ESIPT) of HPIP have been investigated by photophysical methods. Fluorescence emission spectrosco-py, transient fluorescence spectra and UV absorption spectroscopy studies illustrate significant interaction be-tween HPIP and CB7. According to the transient fluorescence spectra, due to the formation of HPIP-CB7 com-plex, the lifetime of HPIP was decreased and the quantum yield was increased followed by the increase of the CB7 concentration. Fluorescence emission spectroscopy showed that the ESIPT of HPIP was increased in dioxane and decreased in n-hexane. Furthermore, the absorption data showed that the HPIP molecules and CB7 forming 1 : 1 complex both in dioxane and n-hexane, and these contentions have been verified by fluores-cence emission data.关键词
七元瓜环/2-(2-羟苯基)咪唑并1,2-a吡啶/质子转移/相互作用Key words
Cucurbit[7]uril/2-(2′-Hyhroxyphenyl)imidazo[1,2-a]pyridine/Proton transfer/Interaction分类
化学化工引用本文复制引用
易平贵,刘金,陈建,于贤勇,李筱芳,郑柏树,陶洪文,郝艳雷..光谱法研究七元瓜环作用下2-（2-羟苯基）咪唑并[1,2-a]吡啶的质子转移[J].高等学校化学学报,2014,(6):1219-1223,5.基金项目
国家自然科学基金(批准号:21172066,20971041)、湖南省自然科学基金(批准号:11JJ2007)和湖南省高校科技创新团队项目(批准号:湘教通[2012]318)资助. Supported by the National Natural Science Foundation of China ( Nos.21172066,20971041), Natural Science Foundation of Hunan Province, China(No.11JJ2007) and the Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province, China(No. Xiangjiaotong[2012]318-17) （批准号:21172066,20971041）
