One- versus two-electron oxidation with peroxomonosulfate ion: reactions with iron(II), vanadium(II), halide ions, and photoreaction with cerium(III)

Gábor Lente, József Kalmár, Zsuzsa Baranyai, Alíz Kun, IIdikö Kék, Dávid Bajusz, Marcell Takács, Lilla Veres, Istvän Fábián

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109 Citations (Scopus)

Abstract

The kinetics of the redox reactions of the peroxomonosulfate ion (HSO 5 -) with iron(ll), vanadium(IV), cerium(lll),chloride, bromide, and iodide ions were studied. Cerium(lll) is only oxidized upon illumination by UV light and cerium(IV) is produced in a photoreaction with a quantum yield of 0.33 ± 0.03. Iron(ll) and vanadium(IV) are most probably oxidized through one-electron transfer producing sulfate ion radicals as intermediates. The halide ions are oxidized in a formally two-electron process, which most likely includes oxygen-atom transfer. Comparison with literature data suggests that the activation entropies might be used as indicators distinguishing between heterolytic and homolytic cleavage of the peroxo bond in the redox reactions of HSO 5 -.

Original languageEnglish
Pages (from-to)1763-1773
Number of pages11
JournalInorganic Chemistry
Volume48
Issue number4
DOIs
Publication statusPublished - Feb 16 2009

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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