Synthesis and mesomorphic behavior of benzothiazole-based liquid crystals having terminal methoxyl group  

作　　者：Sie Tiong Ha Teck Ming Koh Siew Teng Ong Yasodha Sivasothy 

机构地区：[1]Department of Chemical Science,Faculty of Science,Engineering & Technology,Universiti Tunku Abdul Rahman,Jln Universiti,Bandar Barat 31900 Kampar,Perak,Malaysia [2]Department of Science,Faculty of Engineering & Science,Universiti Tunku Abdul Rahman,Jln Genting Klang,Setapak 53300 Kuala Lumpur,Malaysia [3]Chemistry Department,Faculty of Science,Universiti Malaya 50603 Kuala Lumpur,Malaysia

出　　处：《Chinese Chemical Letters》2009年第12期1449-1452,共4页中国化学快报（英文版）

基　　金：Universiti Tunku Abdul Rahrnan(UTAR) for the research facilities and financial support(No.6202/K06);the Malaysian Toray Science Foundation(No.4359/000) for funding this project.T.M.Koh would like to acknowledge UTAR for the award of the research and teaching assistantships.

摘　　要：A homologous series of benzothiazole derivatives, 6-methoxy-2-（4-alkanoyloxybenzylidenamino）benzothiazoles, were synthesized and characterized using FT-IR, ^1H and ^13C NMR, mass spectrometry and elemental analysis. Enantiotropic nematic phase was observed throughout the entire series. Smectic C phase only emerged from the decanoyloxy derivative onwards. The terminal methoxyl group and the ester linkage influenced the mesomorphic behavior of the present series.A homologous series of benzothiazole derivatives, 6-methoxy-2-（4-alkanoyloxybenzylidenamino）benzothiazoles, were synthesized and characterized using FT-IR, ^1H and ^13C NMR, mass spectrometry and elemental analysis. Enantiotropic nematic phase was observed throughout the entire series. Smectic C phase only emerged from the decanoyloxy derivative onwards. The terminal methoxyl group and the ester linkage influenced the mesomorphic behavior of the present series.

关 键 词：BENZOTHIAZOLE Schiff bases NEMATIC Smectic C Liquid crystal 

分 类 号：O626[理学—有机化学]