溶剂性质对苯乙烯-叔胺混合体系荧光光谱的影响  

Effect of Solvent Properties on the Fluorescence Spectra of Styrene-Triethylamine System

作　　者：斯琴图雅[1] 

机构地区：[1]内蒙古医科大学蒙医药学院,内蒙古呼和浩特010110

出　　处：《内蒙古师范大学学报（自然科学汉文版）》2013年第3期329-334,共6页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：内蒙古自治区高等学校科学研究项目(NJZZ11115);博士启动基金项目(NY2011BQ009)

摘　　要：探讨了溶剂对苯乙烯-叔胺体系分子间相互作用的影响.在苯乙烯-叔胺体系的THF溶液中添加三氯乙酸和乙腈,观察发射光谱的变化,并讨论了溶剂效应.结果表明,苯乙烯-叔胺体系的光谱由苯乙烯的荧光带(带A)、激发态的苯乙烯和基态胺的分子之间形成的激发复合体的发射光带(带B)组成.观测添加乙腈和三氯乙酸后的发射光谱变化,推断苯乙烯-三乙胺混合体系的光谱受溶剂的极性作用和氢键结合作用.The effects of the additions of protic and aprotic solvents on the emission spectrum of the styrene-triethylamine （ST-TEA） system in cyclohexane（CH） and THF have been studied under conditions of steady-state illumination, the fluorescence spectrum of the ST-TEA system was separated in to two bands （band A （fluorescence of ST ）and band B （emission from an intermolecular exciplex））. The intensity of band B decreased with increasing solvent polarity. It also decreased owing to the hydrogen- bonding interaction between TEA and protic solvents,but in this case the intensity of band A was found to increase. Acetonitrile has only a polar effect and trichloroacetic acid only a hydrogen-bonding （or protona-tion） effect.

关 键 词：激发复合体 溶剂效应 荧光 极性作用 氢键结合作用 

分 类 号：O621.25[理学—有机化学]