Authors:

Seema Kher, Hitendra Mali, Hemant Prajapati

Abstract:

Novel homologous series 4-(4’-n-alkoxy benzoyloxy)- napthyl-1-azo-(2”-methyl)-4”-azo-2”-methyl benzene consisted of 12 members of a series. All the 12 members (ethoxy to hexadecyloxy) are enantiotropically nematogenic without exhibition of any smectogenic character. Transition temperatures and the textures are determinedby an optical polarizing microscopy furnished with a heatingstage. Textures of a nematic phase are threaded or schlieren.

Analytical and spectral data supported the molecular structure ofhomologs. Transition curves viz., solid-nematic and nematic-isotropic showing phase behavior of the mesophase in a phase diagrambehave in normal manner. Reversion of transition temperatures is show by N–I transition curve. Hereby, novel series is entirely nematogenic and high to middle ordered melting type. Thus, synthesis of a novel azo ester homologous series is fulfil with a view to understand and establish the effect of molecular structure on Liquid crystal (LC) behaviors of a substance.

Keywords:

Mesomorphism, Smectic, Nematic, Azo ester

Vol & Issue:

VOL.13, ISSUE No.4, December 2021