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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
【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。
【Abstract】 Liquid crystalline dendrimer of the third generation PCSi-3G-C4,with 4-butoxyazobenzene 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-functionalized dendrimer exhibits nematic phase.
【Key words】 pentaerythritol; carbosilane liquid crystalline dendrimer; mesogenic moiety; butoxyazobenzene; nematic phase;
- 【文献出处】 功能材料 ,Journal of Functional Materials , 编辑部邮箱 ,2006年01期
- 【分类号】O627.41
- 【下载频次】142