Abstract
AbstractThis article presents a pulse radiolysis study of the reactivity of a SOD‐mimic MnII complex [MnII(IPG)]+ 1 with superoxide. It uses an improved set‐up with a circulating cell. It provides convergent pieces of evidence that 1 catalyses efficiently the dismutation of superoxide. Three sets of experiments are described: (1) Transient formation and decay of an adduct labeled {MnOO}6 were studied. (2) A multi‐pulse experiment showed a reproducible behaviour upon successive superoxide pulses. (3) Superoxide decay was monitored at 270 nm to provide an overall kinetic constant. A mechanism is proposed. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
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