Effects of Different Terminal Substituents on the Mesomorphic Behavior of Some Azo-Schiff Base and Azo-Ester-Based Liquid Crystals
作者:B. T. Thaker、J. B. Kanojiya、R. S. Tandel
DOI:10.1080/15421406.2010.504632
日期:2010.10.14
In order to investigate the influence of the terminal substitution on mesomorphism, two new series of azo-Schiff base and azo-ester liquid crystals having the following structures have been synthesized. All the compounds possess mesomorphic properties. In series A compounds A1 and A3 exhibit only a nematic mesophase, whereas compounds A2, A4, A5, A6, A7, A8, A9, and A10 exhibit a smectic as well as
为了研究末端取代对介晶现象的影响,合成了具有以下结构的两个新系列的偶氮席夫碱和偶氮酯液晶。所有化合物都具有介晶性质。在系列 A 中,化合物 A1 和 A3 仅表现出向列中间相,而化合物 A2、A4、A5、A6、A7、A8、A9 和 A10 表现出近晶相和向列相。在B系列中,化合物B1至B9仅表现出向列中间相,化合物B10和B11表现出近晶相和向列相,但化合物B12仅表现出近晶相。所有这些化合物都通过元素分析和光谱技术(傅立叶变换红外 [FTIR]、1H 核磁共振 [NMR] 和质谱)进行表征。