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Synthesis and mesomorphic properties of Schiff base esters possessing terminal chloro substituent

Ha, Sie Tiong and Ong, Lay Khoon and Lee, Siew Ling and Lin, Hong Cheu and Win, Yip Foo and Ong, Siew Teng (2010) Synthesis and mesomorphic properties of Schiff base esters possessing terminal chloro substituent. Chinese Chemical Letters, 21 (6). 637 - 640. ISSN 1001-8417

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Official URL: http://dx.doi.org/10.1016/j.cclet.2010.01.023

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 (Cn-1H2n-1COO–, 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.

Item Type:Article
Uncontrolled Keywords:Schiff base esters, smectic A, Ssmectic B, liquid crystal
Subjects:Q Science
Divisions:Science
ID Code:26651
Deposited By: Yanti Mohd Shah
Deposited On:18 Jul 2012 11:47
Last Modified:30 Nov 2018 15:07

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