New mesomorphic benzothiazol derivatives: Synthesis and characterization

来源 :Chinese Chemical Letters | 被引量 : 0次 | 上传用户:chinababay
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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 and13C),elemental analysis and EI-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 EI-MS. The mesomorphic behaviors of these compounds were determined by differential scanning calorimetric and polarizing optical microscopic techniques. Compounds nematic and tilted smectic phases upon heating from crystal phase. An obvious odd-even effect was observed in this homologous series.
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