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化学学报
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化学学报 ›› 2003, Vol. 61 ›› Issue (9): 1478-1483. 上一篇    下一篇

研究论文

一代树状碳硅烷液晶研究-端基含12个4-硝基偶氮苯介晶基元

张其震;盛昕;殷晓颖;季怡萍;李光;赵晓光   

  1. 山东大学化学化工学院;中国科学院长春应用化学研究所
  • 发布日期:2003-09-15

Study on a Carbosilane Liquid Crystalline Dendrimer of the First Generation-Containing Twelve 4-Nitroazobenzene Mesogen in Its Periphery

Zhang Qizhen;Sheng Xin;Yin Xiaoying;Ji Yiping;Li Guang;Zhao Xiaoguang   

  1. School of Chemistry and Chemical Engineering, Shandong University;Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
  • Published:2003-09-15

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被引次数

32 | 8

用发散法合成了以四碳硅烷为核心，周边含12个4-硝基偶氮苯介晶基元（M5） 端基的新的一代树状碳硅烷（D1）液晶，并用元素分析、核磁共振、基质辅助激光 解吸离子化飞行时间质谱（MALDI-TOF-MS）、红外、紫外、偏光显微镜、差示扫描 量热（DSC）和X射线衍射法（WAXD）表征。介晶基元化合物（M5）显示向列相，树 状物D1显示胆甾相和S_E相。D1的液晶相相行为是K70Ch188I185Ch58S_E-48K。

关键词: 液晶, 硝基化合物, 苯偶氮化合物, 硅烷, 元素分析, 核磁共振谱法, 飞行时间质谱法, 红外分光光度法, 紫外分光光度法, 示差扫描量热法

The divergent synthesis of a new carbosilane liquid crystalline (LC) dendrimer of the first generation (Dl) is described. Twelve 4- nitroazobenzene are used as mesogenic fragments and attached in its periphery and fourcarbosilane as core. Structure and properties of Dl were characterized by elemental analysis, ~1H NMR, MALDI-TOF-MS, IR, UV-vis, polarizing optical micrograph, DSC and WAXD. Mesogenic compound M5 exhibits nematic and dendrimer Dl reveals cholesteryl and smectic E liquid crystalline state. Phase behavior of Dl in LC state is K70Chl88I185Ch58S_E48K.

Key words: LIQUID CRYSTAL, NITRO COMPOUNDS, BENZENE AZO COMPOUNDS, SILANE, ELEMENTAL ANALYSIS, NMR, TIME-OFF FLIGHT MASS SPECTROMETRY, IR, UV, DSC

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