端基含双键的液晶单体的合成  

Synthesis of Liquid Crystalline Monomers with End Groups Containing Double Bonds

作　　者：孙茹悦 李雪 谢建强 SUN Ru-yue;LI Xue;XIE Jian-qiang(Department of Materials Science and Engineerin;Key Laboratory of Functional Polymer Materials,1.North China of Science and Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学材料科学与工程学院,河北唐山063210 [2]华北理工大学唐山市功能高分子材料重点实验室,河北唐山063210

出　　处：《合成化学》2018年第9期661-666,共6页Chinese Journal of Synthetic Chemistry

基　　金：国家自然科学基金资助项目(51403050);河北省自然科学基金资助项目(E2015209274)

摘　　要：以对羟基苯甲酸甲酯为起始原料,通过醚化和酯化反应合成了系列端基为双键的液晶化合物(dnm),其结构经~1H NMR,^(13)C NMR,FT-IR和元素分析表征。并采用差热扫描量热仪(DSC)和热台偏光显微镜(POM)研究了其液晶性能。结果表明:目标化合物均为互变性热致向列相液晶单体,且其熔点和液晶相转变温度随烷基碳数(m)增加先增大后减小。A series of liquid crystal monomers（ d nm ） with end groups containing double bonds were synthesized by esterification and etherification reaction with methyl 4-hydroxybenzoate as the starting material. The structures were characterized by 1 H NMR, 13 C NMR, FT-IR and elemental analysis. The liquid crystal properties were measured by differential scanning calorimetry（DSC） and thermal polarizing microscope（POM）. It was found that all the target products exhibited enantiotropic nematic mesophase. The melting point and the phase transition temperature of the monomers increase first and then decrease with increasing of carbon number.

关 键 词：对羟基苯甲酸甲酯 液晶 合成 液晶性能 向列型液晶 

分 类 号：O626.4[理学—有机化学] O621.3[理学—化学]