Synthesis and mesomorphic evaluation of new calamitic liquid crystals containing benzothiazole core

The design and synthesis of new calamitic benzothiazole-based liquid crystals,2-[4-（4-alkyloxybenzoyloxy）-phenyl]ben-zothiazoles are presented.The target compound was characterized using spectroscopic techniques,such as FT-IR,NMR（~1H and ~（13）C）,microanalysis and EI-MS.The liquid crystalline behavio...

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Bibliographic Details
Published in:Chinese chemical letters 2011-05, Vol.22 (5), p.619-622
Main Authors: Koh, Teck Ming, Ha, Sie Tiong, Lee, Teck Leong, Lee, Siew Ling, Yeap, Guan Yeow, Lin, Hong Cheu, Subramaniam, Ramesh T.
Format: Article
Language:English
Subjects:
Alkoxy chain
Benzothiazole
Liquid crystal
Nematic
Smectic A
合成
噻唑基
差示扫描量热法
显微镜技术
液晶行为
热稳定性
红外光谱
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Summary:The design and synthesis of new calamitic benzothiazole-based liquid crystals,2-[4-（4-alkyloxybenzoyloxy）-phenyl]ben-zothiazoles are presented.The target compound was characterized using spectroscopic techniques,such as FT-IR,NMR（~1H and ~（13）C）,microanalysis and EI-MS.The liquid crystalline behaviours of these compounds were thoroughly examined by differential scanning calorimetry and polarizing optical microscope techniques.These materials exhibited enantiotropic nematic phase with high thermal stability（168℃）.Smectic A phase starts to emerge as monotropic（metastable） phase from C10 member and changes into enantiotropic（stable） phase from C12 and persists up to C16 members.
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2010.10.042