乙二醇和丙三醇的吸收光谱和荧光光谱研究  

Study on the Absorption and Fluorescence Spectra of Ethylene Glycol and Glycerol

作　　者：徐辉[1] 朱拓[2] 虞锐鹏 

机构地区：[1]江南大学信控学院,江苏无锡214122 [2]江南大学理学院,江苏无锡214122 [3]江南大学检测中心,江苏无锡214122

出　　处：《光谱学与光谱分析》2007年第7期1381-1384,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20276027);江苏省自然科学基金项目(BK2005010)资助

摘　　要：对乙二醇和丙三醇的紫外吸收光谱和荧光光谱进行了实验研究和理论分析,发现两者的最大吸收波长均位于198 nm,且在适当的紫外波长激励下均能发射出荧光,文章中给出了相应的荧光光谱图,但荧光相对强度和激发波长间似乎没有明显变化规律,其原因有待进一步探索。从乙二醇的一阶导数荧光光谱,得知在210 nm激发下荧光相对强度随时间变化最快,在225 nm激发下的绝大多数时间内变化速率最慢。另外,文章还从量子计算出发,采用一维势阱模型,根据电子从HOMO到LUMO的跃迁,计算出了两者的吸收波长值。比较分析了计算值与实验值之间的误差,考虑到将分子直链化后其键长与实际情况有所差别,结果认为理论计算有一定的参考价值。The absorption and fluorescence spectra of ethylene glycol and glycerol solution induced by UV light were studied respectively in the present paper. The most intense absorption wavelength for both of them was located at 198 nm. Moreover, fluorescence was detected when induced by suitable UV light, and the corresponding fluorescence spectra were listed. But there is no obvious relationship found between the fluorescence intensity and the excited wavelength, and a further research should be done. From the first derivative fluorescence spectra of ethylene glycol, it was concluded that under the UV light of 210 nm, the variation speed for relative intensity proved to be the fastest. In contrast, when excited by 225 nm, the speed proved to be the slowest. In addition, based on the quantum calculation and the transition from HOMO to LUMO of electronics in one-dimensional quantum well, the authors attempted to give out the value of absorption wavelength. In consideration of the bond-length varie- ty brought out by the chain processing, the error between the experimental and calculation values should be apprehensible, and the latter can serve as some reference value in theory.

关 键 词：乙二醇 丙三醇 荧光光谱 吸收波长 

分 类 号：O657.3[理学—分析化学]