Kinetic processes in the liquid phase studied by high-frequency permittivity measurements

Abstract

A review with 59 refs.; the application of dielec. relaxation studies to the kinetic processes of ion-pair formation, cooperative mol. processes and H-bonding dynamics in the liq. phase is discussed. For electrolyte solns. an equation is derived which links the exptl. relaxation time of the solute, τIP, with the rate consts. of ion-pair formation and decompn.; results are presented and the limitation of the kinetic approach to ion-pair formation discussed. Kinetic approaches for an interpretation of the slow cooperative relaxation process of hydrogen bonding liqs. are reviewed. The relaxation time of the high-frequency dispersion step in H-bonding liqs., τH ≈1-2 ps, does not yield primary information on the kinetics of hydrogen-bond formation.