基于季戊四醇的三代硅碳烷液晶树状物的合成与表征(英文)  

Synthesis and characterization of pentaerythritol-based carbosilane liquid crystalline dendrimer of the third generation

作　　者：唐新德[1] 张其震[2] 范星河[3] 陈小芳[3] 周其凤[3] 

机构地区：[1]山东交通学院新材料研究所,山东济南250023 [2]山东大学化学与化工学院,山东济南250100 [3]北京大学化学与分子工程学院,北京100871

出　　处：《功能材料》2006年第1期164-168,共5页Journal of Functional Materials

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationofChina(29874020,59573029)

摘　　要：合成了外围含4-丁氧基偶氮苯介晶基元的三代硅碳烷液晶树状物PCSi-3G-C4。以4-[4-(6-羟基己氧基)苯基]丁氧基偶氮苯介晶基团对端基官能团为Si-Cl的三代硅碳烷树状物PCSi-3G-Cl脚手架进行功能化,并利用元素分析、红外光谱(IR)、核磁共振(NMR)、偏光显微镜(POM)、差示扫描量热法(DSC)对其结构与液晶性进行表征。结果表明,与对应的液晶基元相似PCSi-3G-C4显示向列相,但二者在熔点、清亮点和液晶态温区等方面存在一定差异。Liquid crystalline dendrimer of the third generation PCSi-3G-C,, with 4-butoxyazobenaene mesogenic groups on the periphery has been prepared. A terminal Si-Cl functional carbosilane dendrimer of the third generation PCSi-3G-Cl based on pentaerythritol was used as dendritic scaffold and was subsequently functionalized with 4-[4-（6-hydroxyhexyloxy）phenylazo]butoxybenzene groups （M-C4）. Investigation of the liquid crystalline properties by polarized optical microscopy （POM） and differential scanning calorimetry （DSC） showed that, similar to the corresponding mesogenic moiety, the mesogen-funetionalized dendrimer exhibits nematie phase.

关 键 词：季戊四醇 硅碳烷液晶树状物 介晶基元 丁氧基偶氮苯 向列相 

分 类 号：O634.41[理学—高分子化学]