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Adsorption of kryptates of two-charged cations on a mercury electrode

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Abstract

The adsorption of complexes formed by cations of calcium, strontium, and barium with a macrobiocyclic ligand (Kryptofix® 222 of composition C18H36N2O6) is studied as a function of its concentration in 0.1 M solutions of corresponding chlorides by a method of measuring the differential capacitance on a stationary mercury drop. The adsorption parameters of the kryptates studied are determined by a method of regression analysis on the basis of the model of two parallel capacitors supplemented by the Frumkin adsorption isotherm. The differential-capacitance curves, calculated on the basis of these parameters, are compared with experimental data. The determined values of adsorption parameters for kryptates of single-and two-charged cations made it possible to confirm the earlier assumption about a deep mutual relation between the behavior of complexes under study and their structure.

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Authors and Affiliations

  1. 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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Correspondence to L. N. Sviridova.

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Original Russian Text © E.V. Stenina, L.N. Sviridova, 2006, published in Elektrokhimiya, 2006, Vol. 42, No. 7, pp. 869–875.

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Stenina, E.V., Sviridova, L.N. Adsorption of kryptates of two-charged cations on a mercury electrode. Russ J Electrochem 42, 782–788 (2006). https://doi.org/10.1134/S1023193506070123

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  • DOI: https://doi.org/10.1134/S1023193506070123

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