Determination of Substrate/Ligand Binding Constants from Electromotrive Force Measurements |
| |
| Authors: | M. Lopez-Lopez P. Lopez-Cornejo A. García F. Sanchez |
| |
| Affiliation: | (1) Department of Chemistry Engineering, Physical Chemistry and Organic Chemistry, Faculty of Experimental Science, University of Huelva, Campus ‘El Carmen’, 21071 Huelva, Spain;(2) Department of Physical Chemistry, Faculty of Chemistry, University of Seville, c/ Prof. García González s/n, 41012 Seville, Spain |
| |
| 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. |
| |
| Keywords: | Redox Binding constant Aqueous solution Potentials Micelles Iron pentacyanide(4-cyanopyridine) Hexadecyltrimethylammonium chloride |
| 本文献已被 SpringerLink 等数据库收录！ |
|
