摘要
以一种具有偶氮基团的棒状液晶分子——甲基苯酰氧基偶氮苯甲酸为待测样品,通过紫外吸收光谱法,研究了该化合物在不同极性溶剂中完成反式-顺式异构化过程的紫外光照时间和紫外吸收光谱的变化。结果表明,该化合物的紫外吸收强度以及最大吸收波长与溶剂的极性有关,在极性较强的溶剂中,样品的反式结构及顺式结构的吸收向长波方向移动。
A rod-like liquid crystal molecules with azo groups- methyl benzoyl oxy azo benzoic acid as the sample was tested in this paper. Under exposure of UV-light, the time and UV spectrum changes of the trans- cis isomerization of the compounds in solvents of different polarities were determined by UV-visible spectrometer. The result shows that the intensity and maximum absorption wavelength of the compound in UV spectra have a rela-tionship with the polarity of the solvent. In a solvent with strong polarity, the absorption wavelengths of the trans and cis isomers have a tendency to move to longer wavelength.
出处
《化学工程师》
CAS
2015年第9期4-6,共3页
Chemical Engineer
基金
国家自然科学基金资助(21102121)
陕西省科技厅自然科学基金资助项目(2014JM2-2014)
国家级大学生创新创业计划项目(No.201210722002)
关键词
液晶
光敏性
偶氮类衍生物
反式-顺式异构化
liquid crystal
photosensitivity
azo derivatives
trans-cis isomerization