Mesomorphic behavior of new benzothiazole liquid crystals having Schiff base linker and terminal methyl group  

作　　者：Sie Tiong Ha Kok Leei Foo Hong Cheu Lin Masato M.Ito Kazuma Abe Kenji Kunbo S.Sreehari Sastry 

机构地区：[1]Department of Chemical Science,Faculty of Science,Centre for Biodiversity Research,Universiti Tunku Abdul Rahman,Jln Universiti,Bandar Barat,31900 Kampar,Perak,Malaysia [2]Department of Material Science&Engineering,National Chiao Tung University,Hsinchu 300,Taiwan,China [3]Faculty of Engineering,Soka University,1-236 Tangi-cho,Hachioji,Tokyo 192-8577,Japan [4]Department of Physics,Acharya Nagariuna University,Nagariuna Nagar 522510,India

出　　处：《Chinese Chemical Letters》2012年第7期761-764,共4页中国化学快报（英文版）

基　　金：Universiti Tunku Abdul Rahman and Ministry of Higher Education (MOHE) for the financial supports via LRGS(No.LR003-2011A)and research facilities

摘　　要：A homologous series of heterocycles,6-methyl-2-（4-alkoxybenzylidenamino）benzothiazoles,were synthesized and characterized using FT-IR,^1H and ^（13）C NMR and mass spectrometric analysis.Enantiotropic nematic phase was observed for shorter members.Smectic A phase only emerged from octyloxy derivative onwards.The terminal methyl group at the benzothiazole fragment and the Schiff base linkage influenced the mesomorphic behavior of the present series.A homologous series of heterocycles,6-methyl-2-（4-alkoxybenzylidenamino）benzothiazoles,were synthesized and characterized using FT-IR,^1H and ^（13）C NMR and mass spectrometric analysis.Enantiotropic nematic phase was observed for shorter members.Smectic A phase only emerged from octyloxy derivative onwards.The terminal methyl group at the benzothiazole fragment and the Schiff base linkage influenced the mesomorphic behavior of the present series.

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

分 类 号：O621.2[理学—有机化学]