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The role of the hydration configuration in electronic processes involving ions in aqueous solution

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Zeitschrift für Physik

Abstract

The nature of small ions in electrolytic (e.g., aqueous) solutions is discussed in terms of the configuration of the adjoining polarized medium, and the role of this configuration in electronic transitions involving one or a pair of ions is treated in a general way. Light absorption by a single ion is shown to depend critically on this configuration; a theory developed previously by the authors is reviewed, and future possibilities of exploring the nature of the configuration by investigation of such spectra are explained. Electronic transitions, such as an “electron transfer” process, during binary collisions of ions are treated, and a general method is developed, based uponDebye's “diffusion” theory for ion collision rates and a nonadiabatic type of potential curve. Rates of chemical processes are found to depend decisively on the interaction of two ions at separations where the simple coulomb law is not valid.

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Wir haben diese Arbeit als Beitrag für das meinem FreundeRobert Pohl anläßlich seines 70. Geburtstages gewidmete Heft gewählt, da sie Überlegungen über negative elektrolytische Ionen enthält, die sehr nahe verwandt sind mit den Deutungen derPohlschen Farbzentren in Kristallen. Da die Arbeit in eine Reihe von Artikeln gehört, die HerrPlatzman über dies Gebiet weiter zu veröffentlichen gedenkt, so ist sie englisch geschrieben; überdies ist Prof.Platzmans Beitrag bedeutsamer für ihr Zustandekommen als der meine. J.Franck.

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Platzman, R., Franck, J. The role of the hydration configuration in electronic processes involving ions in aqueous solution. Z. Physik 138, 411–431 (1954). https://doi.org/10.1007/BF01340687

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