The intensity and spectra of depolarized light scattered from benzene-nitrobenzene mixtures

Abstract

The intensity and spectra of light scattered from nitrobenzene-benzene mixtures have been studied at 24±1°C. The anisotropic Rayleigh ratio shows a non-linear variation with concentration, attributed to strong orientational correlations between nitrobenzene molecules. The anisotropic spectra have been analysed into two parts corresponding to the two types of molecule, for which spearate correlation times have been obtained. These are compared with reorientation times measured by other experimental techniques. The existence of intermolecular orientational correlations has a marked effect on the reorientation time of the nitrobenzene molecule. A ‘ shear wave dip ’ was observed in some samples and the splitting gives a relaxation time agreeing with the reorientation time.