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Anion-dependence of fast relaxation component in Na-, K-halide solutions at low concentrations measured by
George Mogami1, Takashi Miyazaki, Tetsuichi Wazawa
1Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan.
Abstract:
High-resolution microwave dielectric spectra of NaX, KX (X: F, Cl, Br, I) aqueous solutions of c = 0.05 and 0.1 M measured in the frequency range 0.2-26 GHz at 10 °C are analyzed. The dielectric relaxation (DR) spectrum of each solution, which deviates slightly from the bulk-water spectrum, is mathematically divided into the bulk-water spectrum and the spectrum of solute particles covered with a water layer using a mixture theory by assuming the existence of continuous bulk-water phase. The solute spectra above 3 GHz are fitted with a linear series of pure water component (γ dispersion with DR frequency fw), fast Debye component-1 with DR frequency f1 (>fw), and slow Debye component-2 with DR frequency f2 (
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