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Dielectric relaxation of aqueous NaF and KF solutions
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Dielectric relaxation of aqueous NaF and KF solutions

R. Buchner, G.T. Hefter and J. Barthel
Journal of the Chemical Society, Faraday Transactions, Vol.90(17), pp.2475-2479
1994
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Abstract

Dielectric relaxation experiments in the frequency range 0.45 ≤ ν/GHz ≤ 89 are presented for aqueous solutions of NaF and KF at 25°C. The complex permittivity spectra reveal two dispersion steps attributed to the cooperative relaxation of the solvent, τs ≈ 8 ps, and to the formation of a small quantity of predominantly solvent separated ion pairs, τIP ≈ 100 ps. The dielectric decrement observed for the solvent permittivity is discussed in terms of kinetic depolarization and dielectric saturation; 'effective' solvation numbers are estimated.

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