Calamitic liquid crystals of 1,2,3-triazole connected to azobenzene: synthesis,characterisation and anisotropic properties |
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Authors: | Subramanian Balamurugan Wan Ahmad Kamil Mahmood |
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Affiliation: | Liquid Crystal Research Laboratory, School of Chemical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia |
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Abstract: | Azobenzene-based calamitic liquid crystals, 4-((4-(4-methoxymethyl-1,2,3-triazol-1-yl)phenyl)diazenyl)phenylalkanoates have been isolated and their structures were characterised. The structure–property correlation with respect to the different alkanoyloxy terminal chain (–COOCnH2n+1 where n adopts odd numbers ranging from 3 to 15) has also been given attention in the present study. In this series, all compounds exhibit smectogenic properties. The lower homologues shows enantiotropic SmA phase as well as monotropic SmC phase. The higher homologues exhibit homeotropic alignment of smectic phases. These compounds possess very high anisotropic inclination in which the mesomorphic region covers nearly 80°C. |
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Keywords: | 1,2,3-triazole calamitic liquid crystals homeotropic alignment SmA phase SmC phase |
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