一种以硅为中心的星型液晶的制备与相行为研究  

The synthesis and phase behaviors of the star-like liquid crystals centered by the silicon

作　　者：刘建强[1] 张其震[2] 张静智[2] 

机构地区：[1]山东大学物理与微电子学院 [2]山东大学化学与化工学院,山东济南250100

出　　处：《功能材料》2005年第3期422-424,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(29874020)

摘　　要：通过液晶基元与SiCl4 直接反应获得一种以硅为中心的星型液晶化合物,产品经柱色谱提纯,并利用红外光谱( IR)、核磁共振(1HNMR)和元素分析(EA)对其进行了结构表征,又利用偏光显微镜(POM)、差式扫描量热( DSC)和广角 X 射线衍射(WAXD)对其液晶相行为进行了研究,确定了其相态及区间为K127N144I142N116K,发现星型液晶的相态取决于液晶基元,也是向列相,其熔点和清亮点均高于液晶基元,同时星型液晶的液晶区间比其液晶基元的区间要宽,表明星型液晶具有优良的液晶性,具有潜在应用价值。New star-like liquid crystal centered by the silicon was devised and synthesized by the mesogenic monomers reacting with SiCl_4 directly. It was purified by chromatography and characterized by infrared absorption spectroscopy (IR), nuclear magnetic resonance spectroscopy (NMR) and element analysis (EA) to confirm their structures. Its liquid crystalline phase behavior was investigated by polarizing optical microscope (POM), differential scanning calorimetry (DSC) and wide angle X-ray diffraction (WAXRD). Its mesomorphic behavior was K127N144I142N116K. The mesomorphic behavior of the star-like liquid crystal depend on that of mesogenic monomer, it was nematic liquid crystal as the monomer. Its melting point and clearing temperature are higher than that of monomer. Its mesophase region was wider than that of corresponding monomer, it shows that the star-like liquid crystal can potentially be used as new functional components in the future.

关 键 词：星型 液晶 合成 相行为 

分 类 号：O631[理学—高分子化学] TB32[理学—化学]