Microscopic expression for time-dependent solvation energy of ions and dipoles in dense polar liquids

Abstract

Microscopic expressions for the time dependence of solvation energies of newly created ions and dipoles in a dense dipolar liquid are presented. It is shown that: (i) the dynamics of solvation of an ion differ considerably from that of a dipole, especially that the long wavelength (k=0) component of solvent response is totally absent for dipoles, and (ii) the translational modes of the solvent molecules lead to a breakdown of Onsager’s conjecture on the distance dependence of solvent polarization relaxation.