La[Fe(CN)6] ion pairing in aqueous solution. A dielectric relaxation study

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出版日

DOI 10.1039/A806795C

インパクトファクター 3.676

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要旨

Complex permittivity spectra of aqueous La[Fe(CN)6] solutions at 25°C over the frequency range 0.2⩽ν/GHz⩽89 are presented. Because of the large association constant of lanthanum ferricyanide, KA=5300, and its high ion-pair dipole moment, µIP=77.7 D, dilute solutions in the range 0.0026⩽c/mol dm-3⩽0.0485 could be investigated. It is shown that the current models for the analysis of the ion-pair dispersion amplitude are reliable. The data reveal that the formation of contact ion-pairs is at a nearly diffusion controlled rate, and suggest that the ion-pair activity coefficient deviates from ideality. The effective solvation number of the electrolyte is determined from the solvent permittivity.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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