基于季戊四醇的二代硅碳烷液晶树状物——端基含36个丁氧基偶氮苯基团  

Pentaerythritol-based carbosilane liquid crystalline dendrimer of the second generation

作　　者：唐新德[1] 张其震[2] 范星河[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》2005年第11期1664-1666,1669,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(29874020;59573049)

摘　　要：以基于季戊四醇的二代硅碳烷树状氯化物PCSi-2G-Cl为脚手架、4-丁氧基-4’-羟己氧基偶氮苯(M-C4)为介晶基元,合成了以季戊四醇为核、端基含36个丁氧基偶氮苯的新型硅碳烷液晶树状物PCSi-2G-C4。利用红外光谱(IR)、核磁共振(1H NMR)、元素分析(EA)、偏光显微镜(POM)和差示扫描量热法(DSC)进行了表征。PCSi-2G-C4与M-C4同为向列相,说明树状物相态由介晶基元相态决定。PCSi-2G-C4的熔点比M-C4降低13℃,清亮点比M-C4降低15℃。The second generation terminal Si-C1 functional carbosilane dendrimer PCSi-2G-C1 based on pentae- rythritol was used as dendritic scaffold and was subsequently functionalized with 4-[-4-（6-hydroxyhexyloxy） phenylazo]butoxybenzene （M-C4） mesogenic groups. A novel carbosilane liquid crystalline dendrimer PCSi-2G- C4 containing 36 butoxyazobenzene mesogens on the periphery was prepared. Characterized by elemental analysis, FTIR, ^1 H NMR, polarizing optical micrograph, and DSC. PCSi-2G-C4, similar to M-C4, is nematic liquid crystal,which shows that the mesogenic state depends on that of the corresponding mesogenic units. The melting point of PCSi-2G-C4 was 13℃ lower than that of M-C4. The clearing point of PCSi-2G-C4 is 16℃ lower than that of M-C4.

关 键 词：硅碳烷液晶树状物 季戊四醇 丁氧基偶氮苯 介晶基元 

分 类 号：O634.41[理学—高分子化学]