Mechanism of OH-induced oxidation of p-cresol to p-methylphenoxyl radical (Articolo in rivista)

Type
Label
  • Mechanism of OH-induced oxidation of p-cresol to p-methylphenoxyl radical (Articolo in rivista) (literal)
Anno
  • 2002-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1163/15685670260188674 (literal)
Alternative label
  • Wojnarovits L., Foldiak G., D'Angelantonio M., Emmi S.S. (2002)
    Mechanism of OH-induced oxidation of p-cresol to p-methylphenoxyl radical
    in Research on chemical intermediates (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Wojnarovits L., Foldiak G., D'Angelantonio M., Emmi S.S. (literal)
Pagina inizio
  • 373 (literal)
Pagina fine
  • 386 (literal)
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  • 28 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 14 (literal)
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  • 4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Wojnarovits L. - Hungarian Acad Sci, Chem Res Ctr, Inst Isotope & Surface Chem, H-1525 Budapest, Hungary Foldiak G. - Hungarian Acad Sci, Chem Res Ctr, Inst Isotope & Surface Chem, H-1525 Budapest, Hungary D'Angelantonio M. CNR, Ist Fotochim & Radiaz Alta Energia, I-40129 Bologna, Italy Emmi S.S. CNR, - Ist Fotochim & Radiaz Alta Energia, I-40129 Bologna, Italy (literal)
Titolo
  • Mechanism of OH-induced oxidation of p-cresol to p-methylphenoxyl radical (literal)
Abstract
  • The OH radical induced oxidation of p-cresol to p-methylphenoxyl radical was studied in aqueous solution in a wide pH range by means of pulse radiolysis combined with optical spectroscopy. OH-adduct cyclohexadienyl type radicals were identified as intermediates of the reaction. In the acidic pH range the first-order rate coefficient of phenoxyl radical formation was found linearly dependent on the H3O+ concentration yielding a bimolecular rate coefficient of 1.8 x 10^8 mol-1 dm3 s-1. In the alkaline range a linear dependence was found on the OH- concentration with rate coefficient of 4.9 x 10^10 mol-1 dm3 s-1. These findings were interpreted in terms of acid-base catalysis of the H2O elimination from the OH-adduct. With the time resolution applied, 30 ns, the radical cation p-CH3C6H4OH+· was not observed as intermediate. (literal)
  • The OH radical-induced oxidation of p-cresol to p-methylphenoxyl radical was studied in aqueous solution in a wide pH range by means of pulse radiolysis combined with optical spectroscopy. OH-adduct cyclohexadienyl type radicals were identified as intermediates of the reaction. In the acidic pH range the first-order rate coefficient of phenoxyl radical formation was found linearly dependent on the H3O+ concentration yielding a bimolecular rate coefficient of 1.8 x 10(8) mol(-1) dm(3) s(-1). In the alkaline range a linear dependence was found on the OH- concentration with rate coefficient of 4.9 x 10(10) mol(-1) dm(3) s(-1). These findings were interpreted in terms of acid-base catalysis of the H2O elimination from the OH-adduct. With the time resolution applied, 30 ns, the radical cation p-CH3C6H4OH+. was not observed as intermediate. (literal)
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