摘要
7-羟基喹啉(7-HQ)是一种具有激发态质子转移(ESPT)效应的有机分子。它溶于乙醇溶剂中,在紫 外光的激励下,将发生ESPT反应,荧光光谱出现2个荧光带。7-HQ溶于二甲基亚砜(DMS)溶剂中,则不 能发生ESPT反应,其荧光光谱只出现单一荧光带。但样品被强紫外光照射后,其荧光光谱也出现2个荧光 带。文章首次报道了这一现象,并通过对7-HQ的乙醇、二甲基亚砜和二甲基甲酰胺溶液的吸收光谱和荧光 光谱的研究,探讨产生这一现象的机理。认为7-HQ溶于DMS中被强紫外光照射后荧光光谱的变化是由于 DMS被光解并生成水而使7-HQ发生ESPT反应的结果。
7-hydroxyquinoline （7-HQ） is a kind of organic molecule with excited-state proton transfer （ESPT） effect. 7-HQ in ethanol solution causes ESPT reaction under the excitation of ultraviolet light. The fluorescence spectrum of the sample exhibits two bands. In contrast, 7-HQ in dimethyl sulfoxide （DIMS） solution does not cause ESPT reaction. The fluorescence spectrum of the sample exhibits a single band. But after the sample was irradiated with a strong UV light, its fluorescence spectrum also exhibits two bands. This phenomenon is reported for the first time in the present paper, and its cause is investigated through the study on the absorption spectra and fluorescence spectra of 7-HQ in ethanol, dimethyl sulfoxide and N, N-dimethyl formamlde solution. The conclusion is that the change in the fluorescence spectrum of 7-HQ in DMS solution is due to the fact that 7-HQ causes ESPT reaction which results from the photodecompesition of DMS and the product of water after the solution was irradiated with strong UV light.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2005年第12期2016-2019,共4页
Spectroscopy and Spectral Analysis
基金
教育部光电信息技术科学重点实验室基金资助项目
关键词
7-羟基喹啉
激发态质子转移
吸收光谱
荧光光谱
7-hydroxyquinoline （7-HQ）
Excited-state proton transfer （ESPT）
Absorption spectral Fluorescence spectra
