高等学校化学学报

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (1): 170.

• 研究论文 • 上一篇    下一篇

端基含108个己氧基偶氮苯介晶基元三代树状碳硅烷液晶研究

张其震1, 殷晓颖1, 王大庆2, 李光3, 季怡萍3, 赵晓光3   

  1. 1. 山东大学化学化工学院, 济南 250100;
    2. 山东师范大学测试中心, 济南 250014;
    3. 中国科学院长春应用化学研究所, 长春 130022
  • 收稿日期:2002-11-07 出版日期:2004-01-24 发布日期:2004-01-24
  • 通讯作者: 张其震(1937年出生),男,教授,主要从事液晶高分子研究.E-mail:qzzhang@sdu.edu.cn E-mail:qzzhang@sdu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:29874020,59573029);中国科学院高分子物理重点实验室基金资助

Studies on a Carbosilane Liquid Crystalline Dendrimer of the Third Generation Containing 108 4-Hexyloxyazobenzene Mesogenic Groups in Periphery

ZHANG Qi-Zhen1, YIN Xiao-Ying1, WANG Da-Qing2, LI Guang3, JI Yi-Ping3, ZHAO Xiao-Guang3   

  1. 1. School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China;
    2. Analysis and Test Center, Shandong Normal University, Jinan 250014, China;
    3. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2002-11-07 Online:2004-01-24 Published:2004-01-24

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被引次数

53

摘要： 用发散法合成以四碳硅烷为核心,周边含108个己氧基偶氮苯介晶基元(M3)端基的三代树状碳硅烷(D3)液晶,并用元素分析、核磁共振、激光解吸电离飞行时间质谱、红外光谱、紫外光谱、偏光显微镜、差示扫描量热(DSC)和X射线衍射法(WAXD)进行表征.D3为向列相液晶,与M3相同,三代(D3)、二代(D2)和一代(D1)树状物的相态由介晶基元的相态决定.D3的液晶态相行为是K79N136I132N,D3的熔点比M3的低19℃,D3的清亮点比M3的增加16℃,D3液晶态温区比M3宽35℃.

关键词: 树状化合物, 向列相, 液晶, 碳硅烷, 4-己氧基偶氮苯

Abstract: The divergent synthesis of a new carbosilane liquid crystalline(LC) dendrimer of the third generation(D3) was discribed. One hundred and eight 4-hexyloxyazobenzene groups were used as mesogenic fragments and attached in periphery and four carbosilane as the core. The structure and properties of D3 were characterized by elemental analysis, 1H NMR, MALDI-TOF-MS, IR, UV-Vis, polarizing optical micrograph, DSC and WAXD. D3 is a nematic liquid crystal, which is the same as M3.The mesomorphic behaviour of the dendrimer depends on that of the mesogenic units. The phase behavior of D3 is K79N136I132N. The melting point of D3 is 19 ℃ lower than that of M3, and the clearing point of D3 is 16 ℃ higher than that of M3 and the mesophase region of D3 is 35 ℃ wider than that of M3.

Key words: Dendrimer, Nematic, Liquid crystal, Carbosilane, 4-Hexyloxyazobenzene

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