Molecular orientation in liquid diphenyl ether as probed by depolarized light scattering

Abstract

We report measurements of the depolarized Rayleigh spectra, HV, of neat diphenyl ether in the temperature range 276–353 K and of solutions in CCl₄ at 298 K. The concentration dependence of the HV intensity shows that static orientational pair correlations do not significantly affect the HV spectrum of liquid diphenyl ether. Reorientation of the z axis (passing through the centres of the two phenyl rings) under slipping boundary conditions is found to be consistent with the experimental times and the single Lorentzian profile of the HV spectrum. Aggregate formation near the freezing point as previously proposed is unlikely.