標題: Synthesis and mesomorphic evaluation of new calamitic liquid crystals containing benzothiazole core
作者: Koh, Teck Ming
Ha, Sie Tiong
Lee, Teck Leong
Lee, Siew Ling
Yeap, Guan Yeow
Lin, Hong Cheu
Subramaniam, Ramesh T.
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: Benzothiazole;Alkoxy chain;Nematic;Smectic A;Liquid crystal
公開日期: 1-May-2011
摘要: The design and synthesis of new calamitic benzothiazole-based liquid crystals, 2[4-(4-alkyloxybenzoyloxy)-phenyl]benzothiazoles are presented. The target compound was characterized using spectroscopic techniques, such as FT-IR, NMR ((1)H 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 degrees C). 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. (C) 2010 Sie Tiong Ha. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
URI: http://dx.doi.org/10.1016/j.cclet.2010.10.042
http://hdl.handle.net/11536/8967
ISSN: 1001-8417
DOI: 10.1016/j.cclet.2010.10.042
期刊: CHINESE CHEMICAL LETTERS
Volume: 22
Issue: 5
起始頁: 619
結束頁: 622
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