Fenton reaction driven by iron ligands
| Autor: | Pablo Salgado, Victoria Melin, Yanko Moreno, Héctor D. Mansilla, David Contreras |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
inorganic chemicals Reactive oxygen species Coordination sphere Singlet oxygen iron ligands Advanced oxidation process ROS General Chemistry Biodegradation Photochemistry Fenton reaction chemistry.chemical_compound chemistry Oxidizing agent Hydroxide Hydroxyl radical |
| Zdroj: | JOURNAL OF THE CHILEAN CHEMICAL SOCIETY Artículos CONICYT CONICYT Chile instacron:CONICYT Journal of the Chilean Chemical Society ResearcherID Journal of the Chilean Chemical Society, Volume: 58, Issue: 4, Pages: 2096-2101, Published: DEC 2013 Journal of the Chilean Chemical Society v.58 n.4 2013 SciELO Chile |
| Popis: | One of the most important sources of reactive oxygen species (ROS) in biological systems is the Fenton reaction. In this, the Fe 2+ or Fe 3+ reacts with H 2 O 2 to produce ROS as the hydroxyl radical (∙OH), superoxide radical (O 2∙- ) and singlet oxygen ( 1 O 2 ).The main ROS, responsible for the high oxidizing power of the Fenton reaction, is not clear. Some authors claim that the principal reactive species is ∙OH, while others propose a ferryl specie (Fe 4+ or [FeO] 2+ ) ( 1, 2 ) . Recently, have been proposed that the kind of reaction species produced depends mainly of pH and the iron composition of the coordination sphere. This is highlighted for Fe 3+ , because in mono and (some) bis-complexes Fe is reduced to Fe 2+ and there are some positions occupied by water or hydroxide ligands, readily to be exchanged by H 2 O 2 . On the other hand, in tris-complexes there are not any positions occupied by water or hydroxide, avoiding the formation of peroxo-complexes, necessary for Fenton or Fenton like reaction.The 1,2-dihydroxybenzenes (DHBs) have been described as modulators of Fenton reaction. The DHBs driven Fenton reaction have been used for environmental applications as an advanced oxidation process. Furthermore, these systems participate in different biological process, as the wood biodegradation by fungi and oxidative stress in neurodegenerative diseases.In this review, the effect of 1,2-dihydroxybenzenes on the activated species production by the Fenton and Fenton like reaction will be discussed and its participation in different systems. |
| Databáze: | OpenAIRE |
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