Ha, Sie Tiong and Lee, Teck Leong and Lee, Siew Ling and Yeap, Guan Yeow and Win, Yip Foo and Ong, Siew Teng (2012) Mesomorphic behaviour of new azomethine liquid crystals having terminal bromo substituent. Chinese Chemical Letters, 23 (2). pp. 177-180. ISSN 1001-8417
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Official URL: https://dx.doi.org/10.1016/j.cclet.2011.10.022
Abstract
A homologous series of azomethine esters, 4-n-alkanoyloxybenzylidene-4'-bromoanilines possessing even number of carbon atoms at the terminal alkanoyloxy chain (Cn-1H2n-1COO–, n = 8, 10, 12, 14, 16, 18) was synthesized and characterized. Whilst n-octanoyloxy to n-dodecanoyloxy derivatives exhibited enantiotropic smectic A and smectic B phases, n-tetradecanoyloxy to n-octadecanoyloxy derivatives possessed enantiotropic smectic A and monotropic smectic B properties. n-Decanoyloxy derivatives demonstrated the optimum exhibition for both smectic A and smectic B phases. It was found that the length of terminal alkanoyloxy chain has an influence on mesomorphic properties.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | liquid crystals, Schiff base ester, enantiotropic |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Science |
| ID Code: | 47201 |
| Deposited By: | Narimah Nawil |
| Deposited On: | 22 Jun 2015 05:56 |
| Last Modified: | 29 Feb 2020 13:07 |
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