dc.creator | Benítez Olivares, Francisca Javiera | |
dc.creator | Melin, Victoria | |
dc.creator | Pérez González, Gabriel | |
dc.creator | Henríquez, Adolfo | |
dc.creator | Zarate, Ximena | |
dc.creator | Schott Verdugo, Eduardo Enrique | |
dc.creator | Contreras, David | |
dc.date.accessioned | 2023-06-19T20:31:59Z | |
dc.date.accessioned | 2023-09-14T20:49:33Z | |
dc.date.available | 2023-06-19T20:31:59Z | |
dc.date.available | 2023-09-14T20:49:33Z | |
dc.date.created | 2023-06-19T20:31:59Z | |
dc.date.issued | 2023 | |
dc.identifier | 10.1016/j.chemosphere.2023.139155 | |
dc.identifier | http://doi.org/10.1016/j.chemosphere.2023.139155 | |
dc.identifier | https://repositorio.uc.cl/handle/11534/73508 | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/8797434 | |
dc.description.abstract | The 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.language | en | |
dc.rights | acceso restringido | |
dc.subject | Ferryl | |
dc.subject | Semiquinone | |
dc.subject | Fenton reaction driven by catechol | |
dc.title | The ferryl generation by fenton reaction driven by catechol | |
dc.type | artículo | |