The Autocatalytic Reduction of Ferriin by Malonic Acid with Regard to the Ferroin-Catalyzed Belousov-Zhabotinsky Reaction

Autor:	Marta Mrákavová, Anna Olexová, Milan Melicherčík, Ľudovít Treindl
Rok vydání:	2003
Předmět:	Reaction mechanism Chemistry Inorganic chemistry chemistry.chemical_element General Chemistry Malonic acid Photochemistry Redox Oxygen Catalysis Autocatalysis chemistry.chemical_compound Belousov–Zhabotinsky reaction Ferroin
Zdroj:	Collection of Czechoslovak Chemical Communications. 68:23-34
ISSN:	1212-6950 0010-0765
Popis:	The reduction of ferriin ([Fe(phen)3]3+, phen = 1,10-phenanthroline) by malonic acid (MA) differs from the reduction of Ce(IV) or Mn(III) ions by MA in its autocatalytic character and in a pregnant influence of oxygen, which behaves obviously as a catalyst. The time dependence of the ferroin-ferriin redox potential at the last stage of this reaction has a sigmoidal shape, which indicates autocatalysis. Under anaerobic conditions, the inflection time is of the order of several tens of minutes, since autocatalysis cannot proceed unless a sufficient amount of oxygen is produced via oxidation of water (OH- ions) with Fe(IV) formed by the ferriin dismutation. Under aerobic conditions, the inflection time decreases to a value of a few seconds. The probable reaction mechanism is discussed in detail.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ce0ea700dd59982115aa10542e8e1c0a https://doi.org/10.1135/cccc20030023 Zobrazit plný text záznamu