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 03:47 |
| Last Modified: | 30 Nov 2018 07:07 |
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