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Synthesis of new schiff base ester liquid crystals with a benzothiazole core

Siew Ling, Lee and S. T., Ha and T. M., Koh and G. Y., Yeap and H. C., Lin and S. T., Ong (2010) Synthesis of new schiff base ester liquid crystals with a benzothiazole core. Liquid Crystals, 37 (5). 547 - 554. ISSN 0267-8292

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Official URL: http://dx.doi.org/10.1080/02678291003710425

Abstract

A series of new calamitic liquid crystals, 6-methoxy-2-(4-alkanoyloxybenzylidenamino)benzothiazoles, comprising a benzothiazole core, terminal methoxy group and a Schiff base linkage were synthesised and characterised. This series comprises 12 members wherein members differ by the length of the alkanoyloxy chain (C n-1H2n-1COO-, where n?=?2–8, 10, 12, 14, 16, 18). Their mesomorphic properties were studied by using differential scanning calorimetry, optical polarising microscopy and powder X-ray diffraction techniques. The short chain derivatives (n?=?2 and 3) were non-mesogenic compounds, while an enantiotropic nematic phase was present throughout the remaining members of the series. The smectic C phase emerged from the decanoyloxy derivative onwards.

Item Type:Article
Uncontrolled Keywords:6-methoxy-2-(4-alkanoyloxybenzylidenamino)benzothiazole, schiff bases, nematic, smectic C
Subjects:Q Science
ID Code:26652
Deposited By: Liza Porijo
Deposited On:18 Jul 2012 03:47
Last Modified:06 Aug 2012 07:35

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