New mesomorphic benzothiazol derivatives: Synthesis and characterization  

作　　者：Teck-Ming Koh Sie-Tiong Ha Guan-Yeow Yeap Hong-Cheu Lin 

机构地区：[1]Faculty of Engineering & Science,Universiti Tunku Abdul Rahman,Jln Genting Klang,Setapak [2]Faculty of Science,Universiti Tunku Abdul Rahman,Jln Universiti [3]Centre for Biodiversity Research,Universiti Tunku Abdul Rahman,Jln Universiti [4]Liquid Crystal Research Laboratory,School of Chemical Sciences,Universiti Sains Malaysia [5]Department of Materials Science & Engineering,National Chiao Tung University

出　　处：《Chinese Chemical Letters》2013年第10期926-928,共3页中国化学快报（英文版）

基　　金：Universiti Tunku Abdul Rahman for the fnancial supports and research facilities

摘　　要：In this paper, the synthesis of new mesomorphic benzothiazolyl derivatives, 6-ethoxy-2-[4-（4- alkyloxybenzoyloxy）benzylidenamino]benzothiazoles, is presented. The structures of the title compounds were elucidated using spectroscopic techniques, such as FT-IR, NMR （1H and 13C）, elemental analysis and El-MS. The mesomorphic behaviours of these compounds were determined by differential scanning calorimetric and polarizing optical microscopic techniques. Compounds exhibited nematic and tilted smectic phases upon heating from crystal phase. An obvious odd-even effect was observed in this homologous series.In this paper, the synthesis of new mesomorphic benzothiazolyl derivatives, 6-ethoxy-2-[4-（4- alkyloxybenzoyloxy）benzylidenamino]benzothiazoles, is presented. The structures of the title compounds were elucidated using spectroscopic techniques, such as FT-IR, NMR （1H and 13C）, elemental analysis and El-MS. The mesomorphic behaviours of these compounds were determined by differential scanning calorimetric and polarizing optical microscopic techniques. Compounds exhibited nematic and tilted smectic phases upon heating from crystal phase. An obvious odd-even effect was observed in this homologous series.

关 键 词：Benzothiazole Nematic Smectic C Mesomorphic 

分 类 号：O753.2[理学—晶体学]