Journal article
A re-investigation of the reactions between superoxide anion and metal picolinate complexes
Inorganica Chimica Acta, Vol.153(4), pp.213-218
1988
Abstract
Rate constants for the reactions of superoxide with the α-picolinate ion and its complexes with copper(II), iron(III) and zinc(II), and for the reaction of α-picolinate with the hydrated electron, were measured using pulse radiolysis. The rate constant for the reaction of superoxide with copper(II)picolinate at pH 9 [(4.1 ± 0.4) × 107l mol−1 s−1] was an order of magnitude higher than that determined previously (W. H. Bannister, J. V. Bannister, A. J. F. Searle and P. J. Thornally, Inorg. Chim. Acta, 78, 139 (1983)) using a less direct competitive inhibition method. The corresponding rate constant for iron(III)picolinate [(7.5 ± 1.5) X 103 l mol−1 s−] was an order of magnitude lower than a previous pulse radiolysis determination (same reference as above). We are not able to reconcile these two values for iron(III)picolinate, although a possible source of spuriously high results is contamination with the kinetically active copper(II) complex. The likely roles of iron(III)picolinate and other low molecular weight iron complexes as potential catalysts of an in vivo superoxide-driven Fenton reaction are discussed in the light of present measurements.
Details
- Title
- A re-investigation of the reactions between superoxide anion and metal picolinate complexes
- Authors/Creators
- S.M. Trotman (Author/Creator)J. Webb (Author/Creator)D.F. Sangster (Author/Creator)
- Publication Details
- Inorganica Chimica Acta, Vol.153(4), pp.213-218
- Publisher
- Elsevier BV
- Identifiers
- 991005540866007891
- Copyright
- © 1988 Published by Elsevier B.V.
- Murdoch Affiliation
- School of Mathematical and Physical Sciences
- Language
- English
- Resource Type
- Journal article
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Metrics
29 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- Citation topics
- 1 Clinical & Life Sciences
- 1.127 Molecular & Cell Biology - Pharmacology
- 1.127.1754 Antioxidant Enzymes
- Web Of Science research areas
- Chemistry, Inorganic & Nuclear
- ESI research areas
- Chemistry