Title: Synthesis and mesomorphic behaviours of a homologous series of 2-(4-alkyloxybenzylidenamino)benzothiazoles
Authors: Foo, Kok-Leei
Ha, Sie-Tiong
Win, Yip-Foo
Yeap, Guan-Yeow
Lin, Hong-Cheu
Sastry, S. Sreehari
材料科學與工程學系
Department of Materials Science and Engineering
Keywords: smectic A;Schiff bases;enantiotropic;liquid crystals;2-(4-alkyloxybenzylidenamino)benzothiazoles
Issue Date: 2-Nov-2014
Abstract: The synthesis and characterisation of a series of new rod-shaped liquid crystal (LC), 2-(4-alkyloxybenzylidenamino)benzothiazoles possessing even number of carbon atoms at the alkyloxy chain (CnH2n + 1O-, n=2, 4, 6, 8, 10, 12, 14, 16, 18) are reported. The molecular structures of title compounds were elucidated using FTIR and nuclear magnetic resonance spectroscopic techniques. The phase behaviour of these new compounds was characterised and studied by differential scanning calorimetry and polarising optical microscopy. Lower members (n=2, 4 and 6) did not exhibit mesophase. Octyloxy derivative was monotropic LC. Enantiotropic smectic A phase was observed from n-decyloxy derivatives onward to the last homologous synthesised.
URI: http://dx.doi.org/10.1080/02678292.2014.928833
http://hdl.handle.net/11536/123920
ISSN: 0267-8292
DOI: 10.1080/02678292.2014.928833
Journal: LIQUID CRYSTALS
Volume: 41
Issue: 11
Begin Page: 1516
End Page: 1525
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