對二苯乙烯基苯的光物理及光化學研究：同位素效應

Abstract

本篇論文記載了我們成功地合成雙鍵位子被氘取代的二苯乙烯基苯的順反異構物(順順-、順反-、反反-對二苯乙烯基苯)以及對它們光物理性質及光化學順反異構化反應的研究。依據紅外線吸收光譜及拉曼光譜測量結果，我們標示出對二苯乙烯基苯的振動模式。我們也對其吸收和螢光性質(包括螢光生命期及量子產率)詳加研究。我們發現有無氘取代並沒有明顯的影響，但是在光反應異構化速率上卻有明顯不同。對於動力學研究的結果，我們提供了可能的模型來解釋目前的結果，並與1,2二苯乙烯的光反應異構化反應作比較。In this thesis, we report synthesis and experimental studies of photophysical and photochemical properties of deuterated distyrylbenzene (DSB) isomers in which the hydrogen atoms in the vinyl positions of DSB are replaced by deuterium atoms. We have assigned vibrational modes of these DSB isomers and their deuterated components based on infrared absorption and Raman measurements. Absorption and fluorescence properties, including fluorescence lifetime and quantum yield, have been investigated in great detail. We discovered that no distinct difference was observed between non-deuterated and deuterated compounds. Kinetic measurements of these deuterated DSB isomers have yielded distinguishable difference in photoisomerization rate compared to non-deuterated isomers. Kinetic models were proposed to explain these behaviors and comparison was made with the case of stilbene.