Esr spin trapping evidence for SO.-3 and .OH radicals in sulfite oxidation

Xianglin Shi; N. S. Dalal

doi:10.1163/156856790X00166

Esr spin trapping evidence for SO^.-₃ and .OH radicals in sulfite oxidation

Xianglin Shi, N. S. Dalal

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Abstract

Electron spin resonanee (ESR) spin trapping experimenss have been carried out to investigate the mechanism of sulfite oxidation employing 5,5-dimethyl-1-pyrroine-1-oxide (DMPO) as a spin trap. The results show that sulfite autoxidation, catalyzed by Mn(II), involves not only the SO^.-₃ radicals but also the .OH radicals. An addition of H₂O₂ to the sulfite aqueous medium significantly increases the .OH radical formation. This result provides new clues to the chemical mechanism of the sulfite oxidation and the sulfite toxicity.

Original language	English
Pages (from-to)	103-115
Number of pages	13
Journal	Research on Chemical Intermediates
Volume	13
Issue number	2
DOIs	https://doi.org/10.1163/156856790X00166
State	Published - Jun 1990

ASJC Scopus subject areas

Chemistry (all)

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title = "Esr spin trapping evidence for SO.-3 and .OH radicals in sulfite oxidation",

abstract = "Electron spin resonanee (ESR) spin trapping experimenss have been carried out to investigate the mechanism of sulfite oxidation employing 5,5-dimethyl-1-pyrroine-1-oxide (DMPO) as a spin trap. The results show that sulfite autoxidation, catalyzed by Mn(II), involves not only the SO.-3 radicals but also the .OH radicals. An addition of H2O2 to the sulfite aqueous medium significantly increases the .OH radical formation. This result provides new clues to the chemical mechanism of the sulfite oxidation and the sulfite toxicity.",

author = "Xianglin Shi and Dalal, {N. S.}",

year = "1990",

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T1 - Esr spin trapping evidence for SO.-3 and .OH radicals in sulfite oxidation

AU - Shi, Xianglin

AU - Dalal, N. S.

PY - 1990/6

Y1 - 1990/6

N2 - Electron spin resonanee (ESR) spin trapping experimenss have been carried out to investigate the mechanism of sulfite oxidation employing 5,5-dimethyl-1-pyrroine-1-oxide (DMPO) as a spin trap. The results show that sulfite autoxidation, catalyzed by Mn(II), involves not only the SO.-3 radicals but also the .OH radicals. An addition of H2O2 to the sulfite aqueous medium significantly increases the .OH radical formation. This result provides new clues to the chemical mechanism of the sulfite oxidation and the sulfite toxicity.

AB - Electron spin resonanee (ESR) spin trapping experimenss have been carried out to investigate the mechanism of sulfite oxidation employing 5,5-dimethyl-1-pyrroine-1-oxide (DMPO) as a spin trap. The results show that sulfite autoxidation, catalyzed by Mn(II), involves not only the SO.-3 radicals but also the .OH radicals. An addition of H2O2 to the sulfite aqueous medium significantly increases the .OH radical formation. This result provides new clues to the chemical mechanism of the sulfite oxidation and the sulfite toxicity.

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Esr spin trapping evidence for SO^.-₃ and .OH radicals in sulfite oxidation

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