一种偶氮苯甲醛液晶化合物的合成及性质

Synthesis and Properties of a Liquid Crystalline Azobenzaldehyde Compound

合成了一种既有液晶性又有光敏性的多功能化合物4-[4-(4-丙基苯酰氧)苯偶氮]苯甲醛,运用差热扫描量热分析(DSC)、偏光显微技术(POM)研究了化合物的液晶相性质,运用紫外光谱分析法研究了其紫外光照射后的光反顺异构化过程。结果显示,该化合物具有典型的液晶相性质,且液晶相温度范围宽;同时,该化合物能够发生光致反-顺异构化反应,在甲醇或者THF溶液中反-顺光异构反应为一级速率过程。

A multifunctional compound,4-[4-(4-propylbenzoyloxy)phenylazo]benzaldehyde,which possesses both liquid crystalline and photosensitive properties,was synthesized.The liquid crystalline phase properties of the compound were studied through differential scanning calorimetry(DSC)and polarized optical microscopy(POM).The photo-transcis isomerization process of the compound after UV irradiation was studied with ultraviolet spectroscopy.The results show that the compound has typical liquid crystalline phase properties,and the temperature range of the liquid crystalline phase is wide;at the same time,the compound can undergo photoinduced trans cis isomerization,which is a first-order rate process in methanol or THF solution.