The ferryl generation by fenton reaction driven by catechol

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dc.article.number139155
dc.catalogadorgjm
dc.contributor.authorBenítez Olivares, Francisca Javiera
dc.contributor.authorMelin, Victoria
dc.contributor.authorPérez González, Gabriel
dc.contributor.authorHenríquez, Adolfo
dc.contributor.authorZarate, Ximena
dc.contributor.authorSchott Verdugo, Eduardo Enrique
dc.contributor.authorContreras, David
dc.date.accessioned2023-06-19T20:31:59Z
dc.date.available2023-06-19T20:31:59Z
dc.date.issued2023
dc.description.abstractThe Fenton and Fenton-like reactions are based on the decomposition of hydrogen peroxide catalyzed by Fe(II), primarily producing highly oxidizing hydroxyl radicals (HO∙). While HO∙ is the main oxidizing species in these reactions, Fe(IV) (FeO2+) generation has been reported as one of the primary oxidants. FeO2+ has a longer lifetime than HO∙ and can remove two electrons from a substrate, making it a critical oxidant that may be more efficient than HO∙. It is widely accepted that the preferential generation of HO∙ or FeO2+ in the Fenton reaction depends on factors such as pH and Fe: H2O2 ratio. Reaction mechanisms have been proposed to generate FeO2+, which mainly depend on the radicals generated in the coordination sphere and the HO∙ radicals that diffuse out of the coordination sphere and react with Fe(III). As a result, some mechanisms are dependent on prior HO∙ radical production. Catechol-type ligands can induce and amplify the Fenton reaction by increasing the generation of oxidizing species. Previous studies have focused on the generation of HO∙ radicals in these systems, whereas this study investigates the generation of FeO2+ (using xylidine as a selective substrate). The findings revealed that FeO2+ production is increased compared to the classical Fenton reaction and that FeO2+ generation is mainly due to the reactivity of Fe(III) with HO∙ from outside the coordination sphere. It is proposed that the inhibition of FeO2+ generation via HO∙ generated from inside the coordination sphere is caused by the preferential reaction of HO∙ with semiquinone in the coordination sphere, favoring the formation of quinone and Fe(III) and inhibiting the generation of FeO2+ through this pathway.
dc.fechaingreso.objetodigital2023-06-19
dc.format.extent10 páginas
dc.fuente.origenORCID
dc.identifier.doi10.1016/j.chemosphere.2023.139155
dc.identifier.urihttp://doi.org/10.1016/j.chemosphere.2023.139155
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/73508
dc.information.autorucEscuela de Química; Benítez Olivares, Francisca Javiera; S/I; 1092282
dc.information.autorucEscuela de Química; Schott Verdugo, Eduardo Enrique; S/I; 1020229
dc.language.isoen
dc.nota.accesoContenido parcial
dc.revistaChemosphere
dc.rightsacceso restringido
dc.subjectFerryl
dc.subjectSemiquinone
dc.subjectFenton reaction driven by catechol
dc.titleThe ferryl generation by fenton reaction driven by catechol
dc.typeartículo
dc.volumen335
sipa.codpersvinculados1092282
sipa.codpersvinculados1020229
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