Dielectric relaxation of aqueous NaF and KF solutions
- 1 January 1994
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 90 (17) , 2475-2479
- https://doi.org/10.1039/ft9949002475
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.Keywords
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