新型联苯酯类液晶的合成及其性能研究  

Study on preparation and properties of novel diphenylnate liquid crystals

作　　者：陈卫东[1] 张鹏云 刘志铭 陈艳丽[1] 

机构地区：[1]西北师范大学化学化工学院,兰州730070 [2]甘肃省化工研究院,兰州730020

出　　处：《化工新型材料》2011年第2期59-61,共3页New Chemical Materials

基　　金：甘肃省科技厅"科技支撑计划"(0804GKCA019)

摘　　要：以溴代烷、4-羟基苯甲酸和3,3’,5,5’-四甲基联苯二酚为原料经Williamson醚化、羧酸酰化和酯化反应合成了一个系列的对称联苯酯类液晶共6个化合物,并用FT-IR和1HNMR对产物进行结构表征.通过差示扫描量热仪(DSC),热台偏光显微镜(POM)和X射线粉末射线衍射仪(XRD)研究了它们的相行为,并讨论了分子结构对液晶行为的影响.为进一步研究液晶性能奠定了良好的基础.A series of symmetrical diphenylnate liquid crystals were synthesized from alkyl bromide, 4-hydroxy-benzoic acid and 3,3′, 5,5′-tetramethyl-diphenol by Williamson reaction, acylation and esterification. The structure was confirmed by FT-IR and^1 H-NMR. Their liquid crystal properties were tested by hot stage polarizing microscopy , differential scanning calorimetry and X-ray diffractometer, The effect of molecular structure on liquid crystal properties was discussed, to further study the performance of liquid crystalmaterials laid a good foundation.

关 键 词：3 3’ 5 5’-四甲基联苯二酚 酯类液晶 联苯液晶 织构 

分 类 号：O753.2[理学—晶体学]