Photoreaction Behaviors of Two Liquid Crystalline Cinnamoyl Compounds with Different Phase in Solution and Mesomorphic States  

两种不同液晶相肉桂酸酯在溶液态及液晶态的光化学反应

作　　者：董晓明[1] 郭金宝[1] 魏杰[1] 

机构地区：[1]北京化工大学材料学院,北京100029

出　　处：《Chinese Journal of Chemical Physics》2010年第6期719-725,746,共8页化学物理学报（英文）

摘　　要：A novel nelnatic liquid crystal compound containing a cinnamoyl moiety （PCPC） and a typically cholesteric liquid crystal cholesteryl cinnamate （CC） were synthesized to explore the mechanism ofcinnamoyl compounds, and the chemical structures of photodimerization were confirmed by Fourier transform infrared spectroscopy and 1H nuclear magnetic resonance spectral analysis. The photoreaction behaviors of these two cinnamoyl compounds in mesomorphic state and solution were investigated, UV-Vis spectral analysis was used to analyze the photoproduct. The results show that the photochemistry of PCPC in nematic state involves both photodimerization and photoisomerization, while CC shows a complex reaction which can be divided into three parts, and this has enabled us to present new data and interpretations regarding the [2＋2] photocycloaddition reaction. Additionally, the results of UV-Vis spectral analysis in solutions strongly suggest that UV-Vis spectral analysis can be used to study the kinetic behaviors of cinnamoyl moiety photoreaction.

关 键 词：Cinnamoyl compound Liquid crystal Photoreaction behavior 

分 类 号：O[理学]