X-Ray Studies of Liquid Crystals VIII: A Study of the Temperature Dependence of the Directly Observed Parameters of the Skewed Cybotactic Nematic Phase of Some Bis-(4′-n-Alkoxybenzal) -2-Chloro-1,4-Phenylenediamines

Abstract

By X-ray diffraction, one can determine the average tilt angle, the average layer thickness, the average intermolecular distance, and the intensities of the inner and outer rings of the skewed cybotactic nematic phase, all independently of each other. We have investigated the behavior of these parameters as a function of temperature in the presence of a magnetic field for the C₆, C₈, C₁₀ and C₁₂ members of the bis-(4′-n-alkoxybenzal)-2-chloro-1,4-phenylenediamine series.