摘要
乙醇溶液在紫外光照射下可以发射荧光。当激励的紫外光波长在200~250nm变化时,乙醇溶液产生的荧光光谱基本相同,但峰值位置出现了明显的红移;当激励的紫外光波长相同时,随着溶液浓度的改变也将产生峰值位置的红移现象。文章从实验上对乙醇荧光峰值位置的红移规律进行了研究,并从理论上对红移现象进行了解释。研究结果有助于解释乙醇作为有机溶剂、荧光猝灭剂、食品添加剂等时对其他大分子的荧光光谱特性的影响,也将可能提供一种灵敏、快捷的乙醇含量测试方法。
Ethanol solution can emit visible fluorescence when induced by UV light. With emission spectral profiles similar on the whole, the peaks are red-shifted distinctly when the excitation light alters from 200 to 250 nm. And the spectral profiles of ethanol solutions with different concentrations are also red-shifted when induced by the same wavelength of excotation light. A thorough analysis of the rule of spectrum peaks that are red-shifted is carried out and discussed in theory and in experiment. Investigation on the intrinsic fluorescence spectrum of ethanol solution and its characteristics will contribute to the study of the fluorescence spectra when ethanol serves as a solute and hydrolysis catalyst. Especially, this study will also help to offer a sensitive method of the determination of ethanol.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2005年第2期242-245,共4页
Spectroscopy and Spectral Analysis
基金
教育部科研重点项目(02116)
江苏省研究生创新计划资助