One-electron oxidation of antioxidants: A kinetic-thermodynamic correlation
| Autor: | Daniel O. Mártire, Laura S. Villata, Mónica C. Gonzalez, Andrea Mariela Berkovic |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Physiology
Clinical Biochemistry Electrons Electron Química Inorgánica y Nuclear Kinetic energy Biochemistry Catechin purl.org/becyt/ford/1 [https] symbols.namesake chemistry.chemical_compound Reaction rate constant kinetic-thermodynamic correlation Computational chemistry Gallic Acid purl.org/becyt/ford/1.4 [https] Organic chemistry ABTS Benzothiazoles Research Articles Ciencias Exactas Biochemistry (medical) Ciencias Químicas Física Cell Biology Química epicatechin epigallocatechingallate Gibbs free energy Kinetics antioxidants Radical ion chemistry symbols Thermodynamics Sulfonic Acids Oxidation-Reduction CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | SEDICI (UNLP) Universidad Nacional de La Plata instacron:UNLP CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| Popis: | The values of the bimolecular rate constants for the reactions of 2,2′-azino-bis(3-ethylbenz-thiazoline-6-sulfonic acid) radical cation with epicatechin (((2.4 ± 0.2)) s−1 M−1), and epigallocatechingallate ((29 ± 5) s−1 M−1) were obtained by spectrophotometric measurements. We propose a correlation between the Gibbs energy ΔGº for the one-electron charge-transfer reactions from several antioxidants to radical species and the rate constants of the corresponding bimolecular reactions. This correlation can be used to predict rate constants of reactions of known ΔGº values. Facultad de Ciencias Exactas Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas |
| Databáze: | OpenAIRE |
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