| 基于季戊四醇的三代硅碳烷液晶树状物研究 |
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| 引用本文： | 唐新德,张其震,李爱香,范星河,陈小芳,周其凤.基于季戊四醇的三代硅碳烷液晶树状物研究[J].化学学报,2005,63(2):138-142. |
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| 作者姓名： | 唐新德 张其震 李爱香 范星河 陈小芳 周其凤 |
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| 作者单位： | 山东大学化学与化工学院,济南,250100;济南大学化学化工学院,济南,250022;山东大学化学与化工学院,济南,250100;北京大学化学与分子工程学院,北京,100871 |
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| 基金项目： | 国家自然科学基金(Nos. 29874020，59573029)资助项目. |
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| 摘 要： | 用发散法合成了季戊四醇-四烯丙基醚为核、周边含硝基偶氮苯介晶基元(M-NO2)端基的新型三代硅碳烷液晶树状物PCSi-3G-NO2, 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)和X射线衍射(XRD)进行表征. PCSi-3G-NO2显示胆甾相和近晶SE相, 其液晶相行为是K57SE115I100Ch80SE53K. 而对应的介晶基元M-NO2显示向列相, 二者在熔点、清亮点和液晶态温区等方面差别较大.
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| 关 键 词： | 硅碳烷液晶树状物 季戊四醇 4-硝基偶氮苯 三代树状物 介晶基元 |
| 收稿时间： | 2004-6-14 |
| 修稿时间： | 2004-9-21 |
Study on a Novel Pentaerythritol-based Carbosilane Liquid Crystalline Dendrimer of the Third Generation |
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| TANG,Xin-Dea,b ZHANG,Qi-Zhen,a LI,Ai-Xianga FAN,Xing-Hec CHEN,Xiao-Fangc ZHOU,Qi-Fengc.Study on a Novel Pentaerythritol-based Carbosilane Liquid Crystalline Dendrimer of the Third Generation[J].Acta Chimica Sinica,2005,63(2):138-142. |
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| Authors: | TANG Xin-Dea b ZHANG Qi-Zhen a LI Ai-Xianga FAN Xing-Hec CHEN Xiao-Fangc ZHOU Qi-Fengc |
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| Institution: | (School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100)(School of Chemistry and Chemical Engineering, Jinan University, Jinan 250022)(College of Chemistry and Molecular Engineering, Peking University, Beijing 100871) |
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| Abstract: | The divergent synthesis of a novel pentaerythritol-based carbosilane liquid crystalline dendrimer PCSi-3G-NO2 was described. A terminal Si—Cl functional carbosilane dendrimer of the third generation based on pentaerythritol was used as dendritic scaffold and subsequently functionalized with 4-nitroazobenzene (M-NO2). Structure and properties of PCSi-3G-NO2 were characterized by elemental analysis, 1H NMR, IR, polarizing optical microscopy (POM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD). PCSi-3G-NO2 is cholesteryl and smectic E liquid crystal, different from the mesogenic unit M-NO2 that shows nematic phase. They are different in terms of the melting point, the clearing point and the temperature region of mesogenic phase. |
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| Keywords: | carbosilane liquid crystalline dendrimer pentaerythritol 4-nitroazobenzene dendrimer of the third generation mesogenic group |
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