甲基苯偶氮芳香醛液晶异构化动力学及光电性能  

Isomerization Kinetics and Photo-electric Properties of Methyl Phenyl Azo Aromatic Aldehyde

作　　者：郑敏燕[1] 侯雅慧 张国伟 郭妮 贾瑶 袁戈 ZHENG Min-yan;HOU Ya-hui;ZHANG Guo-wei;GUO Ni;JIA Yao;YUAN Ge(College of Chemistry and Chemical Engineering,Xianyang Normal University,Xianyang 712000,China)

机构地区：[1]咸阳师范学院化学与化工学院

出　　处：《化学试剂》2018年第12期1188-1192,共5页Chemical Reagents

基　　金：国家级大学生创新创业训练计划项目(201710722003);陕西省大学生创新创业训练计划项目(2490);咸阳师范学院大学生创新创业训练计划项目(2017060);咸阳市科技局科学技术研究计划项目(2017k02-19)

摘　　要：以偶氮类液晶化合物4-(4-(4-甲基苯酰氧)苯偶氮)苯甲醛为目标化合物,研究了在不同溶剂(甲醇、四氢呋喃)条件下,紫外光(365 nm)照射一定时间,其反-顺光异构化反应的动力学过程.通过电化学方法,在两种溶剂(无水四丁基高氯酸铵或KCl水溶液为电解质)条件下,测定了样品在无水和水体系中反-顺光异构化过程中电化学性质的变化.结果表明,该目标化合物在甲醇、四氢呋喃两种溶剂条件下光异构化反应均为一级速率过程,且在四氢呋喃中的转化率高于甲醇中的转化率;循环伏安曲线表明在不同体系中,该目标化合物反-顺光异构化反应的HOMO和LUMO能级及能级差(能隙)也在不断变化,且反式结构的能隙高于光稳态结构.The reaction kinetics of trans-cis photoisomerization of the methyl benzoyl azo aryl aldehyde in different solvents (metha- nol and tetrahydrofuran)under irradiation of UV light of 365nm at a certain time was investigated.Electrochemical methods were used to determine the electrochemical properties of the sample in the process of isomerization by using methanol and tetrahydrofu- ran as solvents with anhydrous ammonium tetrabutyl perchlorate(anhydrous)or KCl solution (aqueous system)as electrolytes.The result showed that the photoisomerization reaction of the compound is a first order rate process in each of the solvents,and the conversion rate of the compound in THF is higher than that in the methanol.The energy level curve of the cyclic voltammetry curve showed the HOMO,LUMO and energy gap(Eg)were changed during the isomerization process.The energy gap of the trans isomer is higher than that of photostabilization structure.

关 键 词：动力学 异构化 光电性能 偶氮芳香醛液晶 

分 类 号：O625.4[理学—有机化学]