Koh, Teck Ming and Ha, Sie Tiong and Lee, Teck Leong and Lee, Siew Ling and Yeap, Guan Yeow and Lin, Hong Cheu and Subramaniam, Ramesh T. (2011) Synthesis and mesomorphic evaluation of new calamitic liquid crystals containing benzothiazole core. Chinese Chemical Letters, 22 (5). pp. 619-622. ISSN 1001-8417
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Official URL: http://dx.doi.org/10.1016/j.cclet.2010.10.042
Abstract
The design and synthesis of new calamitic benzothiazole-based liquid crystals, 2-[4-(4-alkyloxybenzoyloxy)-phenyl]benzothiazoles are presented. The target compound was characterized using spectroscopic techniques, such as FT-IR, NMR (1H and 13C), microanalysis and EI-MS. The liquid crystalline behaviours of these compounds were thoroughly examined by differential scanning calorimetry and polarizing optical microscope techniques. These materials exhibited enantiotropic nematic phase with high thermal stability (>168 °C). Smectic A phase starts to emerge as monotropic (metastable) phase from C10 member and changes into enantiotropic (stable) phase from C12 and persists up to C16 members.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | benzothiazole, alkoxy chain, nematic, smectic A, liquid crystal |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Science |
| ID Code: | 29420 |
| Deposited By: | Yanti Mohd Shah |
| Deposited On: | 01 Apr 2013 05:49 |
| Last Modified: | 31 Mar 2019 08:22 |
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