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Adsorption of Kryptate Complexes of Alkali Metals in Electrolytes of Different Compositions and in the Presence of 1-Adamantanol

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Abstract

Data on the adsorption of kryptates of alkali metals on a mercury electrode are obtained for the first time by a method of the measurement of the differential capacitance as a function of potential and are compared to one another. Shown is that there takes place a deep mutual relationship between the structure of a complex and the regularities of its adsorption. An assumption is put forth about the possibility of adsorption of a free ligand in solutions of lithium kryptate, which possesses relatively low strength. The co-adsorption of sodium kryptate with 1-adamantanol, which forms a two-dimensional condensed layer, is investigated. Established is that the C vs. E curves, obtained in 1 M Na2SO4 at a constant activity of 1-adamantanol and a varying concentration of KryptofixR 222, exhibit two distinctly pronounced portions, each of which corresponds to predominant adsorption of one of the surface-active components. The region of predominant adsorption of KryptofixR 222 expands with its concentration.

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Authors and Affiliations

  1. Chemistry Faculty, Moscow State University, Vorob'evy Gory 1, Moscow, 119992, Russia

    E. V. Stenina & L. N. Sviridova

Authors
  1. E. V. Stenina
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  2. L. N. Sviridova
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Stenina, E.V., Sviridova, L.N. Adsorption of Kryptate Complexes of Alkali Metals in Electrolytes of Different Compositions and in the Presence of 1-Adamantanol. Russian Journal of Electrochemistry 40, 946–954 (2004). https://doi.org/10.1023/B:RUEL.0000041362.33638.49

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  • DOI: https://doi.org/10.1023/B:RUEL.0000041362.33638.49

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