Double relaxation times of non-spherical polar liquids in non-polar solvent: a new approach based on single frequency measurement

Abstract

A new approach based on single frequency measurement is suggested to estimate the double relaxation times, tau 1 and tau 2 of some highly non-spherical polar liquids in solvents benzene and carbon tetrachloride. The smaller relaxation time tau 1 refers to the smallest flexible part attached to the parent molecule while the larger one tau 2 is due to end-over-end rotation of the polar molecule. The weighted contributions c1 and c2 towards relaxations are calculated from Frohlich's equations as well as by a new technique adopted here. The dipole moments mu 1 and mu 2 are also computed from the slope beta of the ultra-high-frequency conductivity Kij against the weight fraction omega j for the compounds in terms of tau 1 and tau 1. The close agreement of mu 2 values thus computed with those of existing methods immediately indicates that the approach suggested is correct.