Title: Synthesis and mesomorphic properties of Schiff base esters possessing terminal chloro substituent
Authors: Ha, Sie Tiong
Ong, Lay Khoon
Lee, Siew Ling
Lin, Hong Cheu
Win, Yip Foo
Ong, Siew Teng
材料科學與工程學系
Department of Materials Science and Engineering
Keywords: Schiff base esters;Smectic A;Smectic B;Liquid crystal
Issue Date: 1-Jun-2010
Abstract: A homologous series of Schiff base esters, 4-chlorobenzylidene-4'-n-alkanoyloxyanilines, containing even number of carbons at the end groups of the molecules (C(n-1)H(2n-1)COO-, n = 4, 6, 8, 10, 12, 14, 16) were synthesized. The mesomorphic properties were investigated by differential scanning calorimetry (DSC) and polarizing optical microscopy (POM). It was found that the end groups of the molecules had an effect on the mesomorphic properties. n-Butanoyloxy was found non-mesogenic, whilst n-hexanoyloxy exhibited monotropic smectic phase. The higher members in this homologous series were enantiotropic smectogens. (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.2010.01.023
http://hdl.handle.net/11536/5343
ISSN: 1001-8417
DOI: 10.1016/j.cclet.2010.01.023
Journal: CHINESE CHEMICAL LETTERS
Volume: 21
Issue: 6
Begin Page: 637
End Page: 640
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