Molecular Crystals and Liquid Crystals, Vol.533, 73-81, 2010
Effect of Lateral Substitution on Mesogenic Properties of Fluoro Aniline Derivatives
Three new homologous series of liquid crystals with terminal fluoro group and central linkages such as ester and azo groups were synthesized and their mesomorphic properties were studied. All three series are similar in molecular structure with the difference in their lateral substitutions: series I has no lateral substitution, series II has a chloro group as lateral substitution, and series III has a methyl group as lateral substitution. All 12 homologues of each of the series are mesogenic in nature. The nematic phase of the series shows a marble texture and the smectic phase shows a Schlieren texture of the smectic C variety. The mesomorphic characteristics of the series are compared with each other.
Keywords:Azo ester;chloro and methyl groups;homologues;lateral substituents;mesophase range;smectic C and nematic mesophase