Abstract
An equation, which relates the variations of the standard formal potentials of a redox couple in the presence of variable concentrations of a substrate, S, to the Gibbs energies of binding (to the substrate) of the two forms of the couple, has been obtained. The results have been checked using the data corresponding to the [Fe(CN)54-CNpy]2−/3− couple in CTACl micellar solutions. It is observed that K red<K ox, in spite of the higher charge of the reduced form. This fact has been explained through consideration of the dielectric saturation at the micelle/water interface.
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Lopez-Lopez, M., Lopez-Cornejo, P., García, A. et al. Determination of Substrate/Ligand Binding Constants from Electromotrive Force Measurements. J Solution Chem 37, 519–526 (2008). https://doi.org/10.1007/s10953-008-9252-8
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DOI: https://doi.org/10.1007/s10953-008-9252-8