Studies on Two Members of the Series N-(4-N-alkyloxybenzylidene)- 4′-N-alkylanilines (NO.M's)

Abstract

Detailed investigations of refractive indices, densities and textures have been carried out on two members [(80.8) and (80.10)] of the series n-(4-n-alkyloxybenzylidene)-4′-n-alkylanilines (no.m). The polarizability data evaluated by the experimental studies agree very well with those estimated by Lippincott-δ-function potential model. DSC and X-ray investigations confirm the smectic polymorphism exhibited by the two members to be:

(80.8): K-S_G-S_B-S_A-I

(80.10): K-S_F-S_B-S_A-I

Orientational order parameters have been evaluated in all the liquid crystalline phases for the two compounds using the anisotripic internal field model (Neugebauer approach).