Dielectric Constant and Dielectric Relaxation in Aqueous Solutions of K2PdCl4 and K2PtCl4

摘要

The MW-dielectric properties of aqueous solutions of K2PtCl4 (I) and K2PdCl4 (II) were studied at 298 and 313 K in the frequency range (12-25 GHz) corresponding to the maximum dielectric constant dispersion for water and aqueous solutions of these salts. The low-frequency conductivities were measured. The static dielectric constant, the dielectric relaxation time, and the enthalpy of activation of the dielectric relaxation of the solutions were determined. Compared to pure water, in solutions of salts I and II, the orientational mobility of water molecules is increased and the network of H-bonds is violated more strongly than that of most other ions with hydrophilic hydration. It was demonstrated for the first time that dielectric spectroscopy can be used for analyzing complexation processes in systems containing aqua and hydroxo chloride complexes of metals.