Calamitic liquid crystals of 1,2,3-triazole connected to azobenzene: synthesis, characterisation and anisotropic properties

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 (-COOC n H 2n+1 where n adopt...

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Bibliographic Details
Published in:Liquid crystals 2014-06, Vol.41 (6), p.776-783
Main Authors: Balamurugan, Subramanian, Yeap, Guan-Yeow, Mahmood, Wan Ahmad Kamil
Format: Article
Language:English
Subjects:
1,2,3-triazole
Anisotropy
calamitic liquid crystals
Chains
Correlation analysis
homeotropic alignment
Homology
Hydrocarbons
Inclination
Liquid crystal polymers
Liquid crystals
SmA phase
SmC phase
Synthesis
Terminals
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Summary: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 (-COOC n H 2n+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.
ISSN:0267-8292
1366-5855
DOI:10.1080/02678292.2014.889231