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Is There an Anionic Hofmeister Effect on Water Dynamics? Dielectric Spectroscopy of Aqueous Solutions of NaBr, NaI, NaNO3, NaClO4, and NaSC

Wachter, Wolfgang ; Kunz, Werner ; Buchner, Richard ; Hefter, Glenn



Abstract

A systematic study of the dielectric relaxation spectra of aqueous solutions of NaBr, NaI, NaNO3, NaClO4, and NaSCN has been made over a wide range of frequencies (0.2 <= v/GHz <= 89) and solute concentrations (0.05 <= c/M <= 1.5) at 25 degrees C. The spectra could be adequately described by a single Cole-Cole (CC) process, symmetrically broadened relative to that of pure water. However, similar ...

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