Liquid Crystalline Properties of Salicylaldimine- Based Dimers Derived From Isophthalic Acid

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Author(s) Sandy Subal | Syama Sundar | Sreehari Sastry
Pages 34-39
Volume 4
Issue 1
Date January, 2015
Keywords Bent-core, enantiotropic, B2 phase, stable

The synthesis and thermotropic properties of a homologues series of salicylaldimine -based dimer liquid crystals are reported. Two 2-hydroxy-4-n-alkoxybenzaldehyde groups are connected to a central part consisting of 2-Methyl-4-methylene-pent-2- enedioic acid bis-(4-amino-phenyl) ester unit. The terminal alkoxy chains have been varied from 4 to 11 and 16 carbon atoms in length. All the compounds exhibit liquid crystalline phases whose behaviour depends on the length of the alkoxy terminal chains. All compounds of the series exhibit enantiotropic B-phases and the sequence B1-B2 on increasing terminal chain length was observed. The shorter homologues of this series show the B1 phase, while the longer homologues exhibit B2 phase.

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