Thermodynamics of complexation of monovalent metal cations by the ionophore monensin free acid in acetonitrile
| Autor: | Lionel Astier, Jean Juillard, Claude Bernard, Yvon Pointud, Sébastien Touzain, Béatrice Sabatier |
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| Přispěvatelé: | Laboratoire de Chimie Physique des Solutions, Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 1997 |
| Předmět: |
Conductometry
010405 organic chemistry Inorganic chemistry Monensin Enthalpy Biophysics Ionophore 010402 general chemistry 01 natural sciences Biochemistry 0104 chemical sciences Gibbs free energy Metal chemistry.chemical_compound symbols.namesake Membrane chemistry visual_art visual_art.visual_art_medium symbols [CHIM]Chemical Sciences Physical and Theoretical Chemistry Acetonitrile Molecular Biology ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Scopus-Elsevier Journal of Solution Chemistry Journal of Solution Chemistry, 1997, 26 (5), pp.479-495. ⟨10.1007/BF02767602⟩ Journal of Solution Chemistry, Springer Verlag (Germany), 1997, 26 (5), pp.479-495. ⟨10.1007/BF02767602⟩ |
| ISSN: | 1572-8927 0095-9782 |
| DOI: | 10.1007/bf02767602 |
| Popis: | The standard Gibbs functions, enthalpies, and entropies for the formation of the complexes of monensin acid with monovalent metal cations in acetonitrile were obtained using various methods (conductometry, potentiometry, and calorimetry). Complexation is appreciable (from 2.0 to 4.5 in terms of association constant logarithm) and controlled mainly by the enthalpic effect. Comparison with formation of the corresponding neutral complexes permits a comparison to the process of monensin mediated transport of cation in membranes. A two-step process involving first the formation of the acidic complex is suggested. |
| Databáze: | OpenAIRE |
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