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An EPR Study of Superoxide Radicals from Potassium Superoxide Solutions

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Abstract

Electron paramagnetic resonance spectroscopy and the spin trapping technique were employed in order to monitor the superoxide radical liberated from potassium superoxide in aqueous alkaline solutions; DEPMPO (5-diethoxyphosphoryl-5-methyl-1-pyrroline-N-oxide) was used as a trapping agent. Three reaction systems were prepared, varying the ratios between KO2, superoxide and DEPMPO. The data indicate distinct mechanisms leading to DEPMPO/spin adducts with different kinetic rates.

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Acknowledgments

The authors (L. Bolojan and I. M. Takács) acknowledge financial support from a program co-financed by the Sectoral Operational Programme Human Resources Development, contract POSDRU 6/1.5/S/3—“Doctoral studies: through science towards society”.

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Authors and Affiliations

  1. Faculty of Physics, “Babes-Bolyai” University, Str. Mihail Kogalniceanu no. 1, 400084, Cluj-Napoca, Romania

    Laura Bolojan, István Mihály Takács & Grigore Damian

  2. Faculty of Chemistry and Chemical Engineering, “Babes-Bolyai” University, Str. Arany Janos no. 11, 400028, Cluj-Napoca, Romania

    Vasile Miclaus

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  1. Laura Bolojan
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  2. István Mihály Takács
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  3. Vasile Miclaus
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  4. Grigore Damian
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Correspondence to Grigore Damian.

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Bolojan, L., Takács, I.M., Miclaus, V. et al. An EPR Study of Superoxide Radicals from Potassium Superoxide Solutions. Appl Magn Reson 42, 333–341 (2012). https://doi.org/10.1007/s00723-011-0310-9

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  • DOI: https://doi.org/10.1007/s00723-011-0310-9

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