A Pulse Radiolysis Study of an Imidazolato-Bridged Asymmetric Dicopper(II) Complex: A Structural and Functional Mimic of Superoxide Dismutase(269 views) Tabbì G, Nauser T, Koppenol WH, Reedijk J
Affiliations: Dipartimento di Scienze Chimiche, Università di Catania, V le A. Doria 6, I-95125 Catania, Italy
Lab. für Anorganische Chemie, ETH-Zentrum, Universitätstrasse 6, CH-8092 Zürich, Switzerland
Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P. O. Box 9502, NL-2300 RA Leiden, Netherlands
Lab. f r Anorganische Chemie, ETH-Zentrum, Universit tstrasse 6, CH-8092 Z rich, Switzerland
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A Pulse Radiolysis Study of an Imidazolato-Bridged Asymmetric Dicopper(II) Complex: A Structural and Functional Mimic of Superoxide Dismutase
The ability of a dicopper(II) complex with a pentadentate, imidazolato-bridged ligand having two different coordination environments to mimic the reactivity of superoxide dismutase has been investigated by pulse radiolysis. Pseudo first-order kinetics were observed for superoxide scavenging, with a very high rate constant of 1.9 ± 0.4 × 109 M-1 s-1, consistent with catalytic dismulation of superoxide by the complex. This value is essentially constant over the pH range of 5 to 7, and agrees with earlier results obtained with the nitroblue tetrazolium assay.
A Pulse Radiolysis Study of an Imidazolato-Bridged Asymmetric Dicopper(II) Complex: A Structural and Functional Mimic of Superoxide Dismutase
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A Pulse Radiolysis Study of an Imidazolato-Bridged Asymmetric Dicopper(II) Complex: A Structural and Functional Mimic of Superoxide Dismutase