Rate constants of highly hydroxylated fullerene C60 interacting with hydroxyl radicals and hydrated electrons. Pulse radiolysis study

Pulse radiolysis was applied to investigate the reaction of C-60(OH)(36) with center dot OH radicals, or hydrated electrons (e(aq)(-)). The second-order rate constants for the reactions between fullerenol and center dot OH radicals (2 x 10(9) dm(3) mol(-1) s(-1)) or hydrated electrons (2.5 x 10(9) dm(3) mol(-1) s(-1)) were determined. The most probable mechanism of the reaction of center dot OH with fullerenol was via the formation of a pi-complex that could dissociate to reform the reactants in competition with the rearrangement to the sigma-complex. The large number of hydroxyl groups attached to the fullerenol carbon cage did not result in any significant change in the rate constant for the reaction of fullerenol with hydroxyl radicals or e(aq)(-). (C) 2014 Elsevier Ltd. All rights reserved.