Mesomorphic properties of liquid crystalline compounds with central linkage chalconyl ester and laterally substituted bromo group

ABSTRACT

To investigate the mesomorphic property of the substitution on mesomorphism, the new series of liquid crystals having the following structures have been synthesized. Presently synthesized series contain thirteen homologue (C₁ to C₈, C₁₀, C₁₂, C₁₄, C₁₆, C₁₈) in which eleven homologue (C₃ to C₁₈) shows both smectic as well as nematic phase during heating and cooling condition in enantiotropic manner, while C₂ homologue shows only nematic phase. All the homologues were characterised by elemental analysis and spectroscopic techniques like ¹H-NMR and IR analysis. Their liquid crystalline behaviours were measured by polarised optical microscope (POM) and Differencial Scanning Calorimetry (DSC).

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WSN 54 (2016) 202-216