Formation of hydroxyl radicals by irradiated 1-nitronaphthalene (1NN): oxidation of hydroxyl ions and water by the 1NN triplet state - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue Photochemical & Photobiological Sciences Année : 2011

Formation of hydroxyl radicals by irradiated 1-nitronaphthalene (1NN): oxidation of hydroxyl ions and water by the 1NN triplet state

Résumé

The excited triplet state of 1-nitronaphthalene (31NN*) reacts with OH- with a second-order reaction rate constant of (1.66 ± 0.8)¥107 M-1 s-1 (m ± s). The reaction yields the ∑OH radical and the radical anion 1NN-∑. In aerated solution, the radical 1NN-∑ would react with O2 to finally produce H2O2 upon hydroperoxide/superoxide disproportionation. The photolysis of H2O2 is another potential source of ∑OH, but such a pathway would be a minor one in circumneutral (pH 6.5) or in basic solution ([OH-] = 0.3-0.5 M). The oxidation of H2O by 31NN*, with rate constant 3.8 ± 0.3 M-1 s-1, could be the main ∑OH source at pH 6.5.
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hal-00694954 , version 1 (07-05-2012)

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  • HAL Id : hal-00694954 , version 1

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Babita Sur, Rolle Maura, Claudio Minero, Valter Maurino, Davide Vione, et al.. Formation of hydroxyl radicals by irradiated 1-nitronaphthalene (1NN): oxidation of hydroxyl ions and water by the 1NN triplet state. Photochemical & Photobiological Sciences , 2011, pp.1817-1824. ⟨hal-00694954⟩
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