Events The 14th International Electronic Conference on Synthetic Organic Chemistry

Event submissions

Published

This submission belongs to the session a. General Organic Synthesis of the event The 14th International Electronic Conference on Synthetic Organic Chemistry

Published date

31 Oct, 2010

Citation

Guan-Yeow G.Y. Yeap, Teck-Leong T.L. Lee, Teck-Ming T.M. Koh, Sie-Tiong S.T. Ha, New Heterocyclic Liquid Crystals with Benzothiazole Core, in Proceedings of The 14th International Electronic Conference on Synthetic Organic Chemistry, 1 November–30 November 2010, MDPI: Basel, Switzerland, doi: 10.3390/ecsoc-14-00373

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New Heterocyclic Liquid Crystals with Benzothiazole Core

Guan-Yeow G.Y. Yeap ¹

Teck-Leong T.L. Lee ²

Teck-Ming T.M. Koh ^2,3

Sie-Tiong S.T. Ha ²

1. School of Chemical Sciences, Universiti Sains Malaysia, Malaysia

2. Faculty of Science, Universiti Tunku Abdul Rahman, Malaysia

3. Department of Chemistry, National University of Singapore, Singapore

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 & 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. Smectic A phase starts to emerge as monotropic phase from C10 member and changes into enantiotropic phase from C12 and persists up to C16 members.

Keywords

benzothiazole

liquid crystals

nematic

smectic A

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