Intermolecular Interactions in 4,4′-di-<i>n</i>-propoxy-azoxybenzene. Part II—Experimental

Abstract

Abstract Temperature dependence of Ultrasonic velocity and specific volume have been studied in the case of 4,4′-di-n-propoxy-azoxybenzene dissolved in a non-interacting and non-mesogenic solvent, benzene, at different concentrations. The concentration of the liquid crystal molecules was chosen such that the intermolecular separation lies in the range of 8.5 Å to 13.5 Å. It was observed that the solutions of liquid crystalline substances exhibit interesting variations in the physical parameters as a function of temperatures. Physical quantities like adiabatic compressibility, molar sound velocity, molar compressibility and intermolecular freelength have also been calculated. Present study offers an experimental support to the probability distribution picture obtained with the help of our theoretical investigations.