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Reactions of H atoms and OH radicals with ascorbic acid: A pulse radiolysis Fourier transform ESR study

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Abstract

Using pulse radiolysis, free radicals of ascorbic acid were generated by reactions of the primary radicals H and OH in acidic and basic aqueous solutions. The formation and the decay of several radicals of ascorbic acid were detected by time resolved Fourier transform electron spin resonance within a time interval of 100 ns to 1 ms. The rate constant of addition of H atoms to ascorbic acid (1.3·108 dm3· mol−1·s−1) was directly determined by the change of line width of the low field line of the H atom in the presence of ascorbic acid. The addition of OH radicals to ascorbic acid results in different radical structures, detected by highly resolved Fourier transform ESR spectra.

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Authors and Affiliations

  1. Research Unit “Time Resolved Spectroscopy”, University of Leipzig, Permoserstrasse 15, D-04318, Leipzig, Germany

    H. Sprinz, D. Beckert & O. Brede

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  1. H. Sprinz
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  2. D. Beckert
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  3. O. Brede
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Sprinz, H., Beckert, D. & Brede, O. Reactions of H atoms and OH radicals with ascorbic acid: A pulse radiolysis Fourier transform ESR study. J Radioanal Nucl Chem 232, 39–41 (1998). https://doi.org/10.1007/BF02383709

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  • DOI: https://doi.org/10.1007/BF02383709

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