Kinetic Processes in the Liquid Phase
Studied by High-Frequency Permittivity Measurements
R. Buchner and J. Barthel
J. Mol. Liq. 63, 55-75 (1995).
Abstract
The application of dielectric relaxation studies to the kinetic processes
of ion-pair formation, cooperative molecular processes and H-bonding
dynamics in the liquid phase is discussed. For electrolyte solutions an
equation is derived which links the experimentaì relaxation time of the
solute, tauIP, with the rate constants of ion-pair formation and
decomposition; 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 liquids are reviewed. The relaxation time of the high-frequency
dispersion step in H-bonding liquids, tauH = 1-2 ps, does not
yield primary information on the kinetics of hydrogen-bond formation.
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(c) 1998 Herbert Poepke
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