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乙醇溶液的荧光光谱研究
引用本文:兰秀风,刘莹,刘建刚,沈中华,陆建,倪晓武.乙醇溶液的荧光光谱研究[J].光子学报,2003,32(11):1371-1374.
作者姓名:兰秀风  刘莹  刘建刚  沈中华  陆建  倪晓武
作者单位:南京理工大学应用物理系,南京,210094
摘    要:分别从理论和实验上对乙醇水溶液在可见波段产生的荧光光谱及其特性进行了分析研究结果表明,在波长为253.7nm的紫外光激励下,乙醇溶液可以产生两个较强的荧光峰,即278~493nm和534~665nm荧光峰随乙醇溶液浓度的变化而变化,但在溶液的高浓度区和低浓度区,荧光的变化规律不同经理论分析认为,乙醇在253.7nm的激励下发出的荧光是由乙醇分子中C-OH基团的孤对电子产生的研究乙醇溶液的荧光光谱及其特性可为其作为有机溶剂对有机高分子的荧光光谱进行研究提供参考.

关 键 词:乙醇  荧光光谱  乙醇水溶液  紫外光激发
收稿时间:2002-12-25

Fluorometic Determination of Ethanol Solution
Abstract.Fluorometic Determination of Ethanol Solution[J].Acta Photonica Sinica,2003,32(11):1371-1374.
Authors:Abstract
Institution:Department of Applied Physics, Nanjing University of Science &; Technology, Nanjing 210094
Abstract:The visible fluorescence spectra from ethanol-water solution and its characteristics are investigated in experiment and theory. The experimental results indicate that spectral profile of ethanol has two prominent fluorescence regions from 278 nm to 493 nm and from 534 nm to 665 nm when excited by ultraviolet (UV) light (λmax=253.7 nm). The fluorescence spectra change as the concentration of solution alters. However, the change rules of solution with high concentration are different from those with low concentration. Furthermore, the physical mechanisms of fluorescence emission of ethanol-water solution induced by UV-light are analyzed based on the theory of molecule orbital structure. It is considered that this fluorescence comes from the transition from nonbonding electrons namely n electrons in the hetero-atom group (C-OH) to the antibonding orbital σ*. Investigation on the fluorescence spectra and its characteristics will contribute to study of other organic macromolecule fluorescence spectra when alcohol serves as solvent.
Keywords:Ethanol  Fluorescence spectrum  Ethanol  water solution  Ultraviolet light induced
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