低聚噻吩衍生物的合成及液晶性能

华南理工大学学报(自然科学版) ›› 2003, Vol. 31 ›› Issue (5): 11-15.

低聚噻吩衍生物的合成及液晶性能

刘平胡建华赵其中周小平童真许运华邓文基

1．华南理工大学材料科学研究所广东广州 510640；2．华南理工大学应用物理系广东广州 510640

出版日期:2003-05-20 发布日期:2022-04-27
基金资助:
教育部留学回国人员科研启动基金；科技部基础研究重大项目前期研究专项资助项目（2001－CCA03500）；人事部留学人员科技活动项目择优资助

Synthesis and Liquid Crystal Properties of Oligothiophene Derivatives

Liu Ping Hu Jian-hua Zhao Q- i zhong Zhou Xiao-ping Tong Zhen Xu Yun-hua Deng Wen-ji

1．Research Institute of Materials ScienceSouth China Univ．of Tech．Guangzhou510640China；
2．Department of Applied PhysicsSouth China Univ．of Tech．Guangzhou510640China

Online:2003-05-20 Published:2022-04-27

摘要/Abstract

摘要： 设计合成了一系列新型低聚噻吩衍生物 NN’-双烷烃基-55”-二溴基-22’：5’2”-三噻吩-44”-二酰胺（DNC n DBr3Tn＝581618）．示差扫描量热法测定及偏光光学显微镜观察的结果显示DNC 18 DBr3T 、DNC 16 DBr3T、DNC 8 DBr3T 具有近晶 A 相液晶性质．研究结果表明烷基链的长度以及分子间氢键对于液晶的形成起着重要作用．另外还考察了 DNC n DBr3T（n ＝81618）的光、电性能以及与有机溶剂的凝胶化性能．

关键词: 低聚噻吩衍生物, 液晶, 分子间氢键, 液晶凝胶

Abstract: With the aim of developing new oligothiophene-based liquid crystals involving hydrogen bondingnew terthio-phene derivatives containing an alkylamide groupNN’-dialky- l55”-dibromo-22’：5’2”-terthiophene-44”-dica-rboxamide （DNC n DBr3Tn＝581618）were designed and synthesizedand their thermal behavior were examined．While DNC n DBr3T compounds with n＝81618were found to form smectic A phase．It is shown that the alkyl chain length greatly affects liquid crystal phase formation．The absence of liquid crystallinity in the corresponding ester derivatives suggests that intermolecular hydrogen bonding also plays a role in the formation of liquid crystal phase in the DNC n DBr3T system．The electrical opticaal and gelation
properties of DNC n DBr3T（n ＝81618） were reported．

Key words: oligothiophene derivative, liquid crystal, intermolecular hydrogen bonding, liquid crystal gel

刘平胡建华赵其中周小平童真许运华邓文基 . 低聚噻吩衍生物的合成及液晶性能[J]. 华南理工大学学报(自然科学版), 2003, 31(5): 11-15.

Liu Ping Hu Jian-hua Zhao Q- i zhong Zhou Xiao-ping Tong Zhen Xu Yun-hua Deng Wen-ji . Synthesis and Liquid Crystal Properties of Oligothiophene Derivatives[J]. Journal of South China University of Technology(Natural Science Edition), 2003, 31(5): 11-15.

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