The Autocatalytic Oxidation of Iodine with Hydrogen Peroxide in Relation to the Bray-Liebhafsky Oscillatory Reaction

Autor:	Marta Mrákavová, Ľudovít Treindl, Anna Olexová, Milan Melicherčík
Rok vydání:	2006
Předmět:	chemistry.chemical_classification Chemistry Induction period Radical Iodide Inorganic chemistry chemistry.chemical_element Disproportionation General Chemistry Photochemistry Iodine Bray–Liebhafsky reaction chemistry.chemical_compound Hydrogen peroxide Iodine clock reaction
Zdroj:	Collection of Czechoslovak Chemical Communications. 71:91-106
ISSN:	1212-6950 0010-0765
DOI:	10.1135/cccc20060091
Popis:	The oxidation of iodine with hydrogen peroxide was studied spectrophotometrically and potentiometrically. At low concentrations of HClO4, after induction period (IP), the iodine concentration decreases sigmoidally and IP decreases with decreasing surface area of the solution interphase. We assume that •OH radicals are produced via the oxidation of iodide with H2O2 and, by their subsequent reaction with H2O2, the HO2• radicals are formed. By their disproportionation, 2 HO2• ↔ H2O2 + 1O2, very reactive singlet oxygen is produced and the oxidation of iodine can start. The described experimental results are consistent with the Noyes-Treindl mechanism.
Databáze:	OpenAIRE
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