棒状硫醇液晶的合成  

Synthesis of Calamitic Thiol Terminated Liquid Crystals

作　　者：王彩虹[1] 谭帅[1] WANG Cai-hong;TAN Shuai(School of Chemical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学化学工程学院

出　　处：《合成化学》2019年第11期909-912,929,共5页Chinese Journal of Synthetic Chemistry

基　　金：国家自然科学基金青年基金资助项目(21805199)

摘　　要：通过亲核取代反应引入硫醇官能团,利用缩合反应形成苯甲酸联苯酯基元,合成了以苯甲酸联苯酯为液晶基元分子端部含有硫醇基团的棒状分子--4′-(6-巯基己烷氧基)-4-烷氧基-苯甲酸联苯酯(4a^4c),其结构经1 H NMR、IR、HR-MS(ESI)和元素分析表征。偏光显微观察和差示扫描量热分析结果表明:4在60~170℃表现出热致性近晶A相与向列相。随着端部烷氧链的增长,4的近晶A相温度区间由14℃拓宽到38℃,而清亮点由170℃逐渐降低至129℃。Biphenyl benzoate based calamitic liquid crystals bearing a terminal thiol moiety,4′-(6-mercaptohexoxy)-biphenyl-4-yl 4-(alkoxy)benzoate(4a^4c),was prepared.The thiol moiety was introduced by nucleophilic substitution,and the biphenyl benzoate mesogen was synthesized via esterification reactions.The structure was characterized by 1 H NMR,IR,HR-MS(ESI)and EA.Polarized optical microscopy and differential scanning calorimeter suggested that the compound 4 exhibited thermotropic smectic A phase and nematic phase from 60℃to 170℃.As the elongation of the terminal alkoxy chain in the compounds 4,the temperature range of the smectic A phase for the compounds broadened from 14℃to 38℃,while the clearing points lowered from 170℃to 129℃.

关 键 词：近晶A相 向列相 硫醇 苯甲酸联苯酯 棒状分子 合成 

分 类 号：O625.13[理学—有机化学]