Abstract
Inorganic radicals, such as superoxide and hydroxyl, play an important role in biology. Their tendency to oxidize or to reduce other compounds has been studied by pulse radiolysis; electrode potentials can be derived when equilibrium is established with a well-known reference compound. An IUPAC Task Group has evaluated the literature and produced the recommended standard electrode potentials for such couples as (O2/O2·-), (HO·, H+/H2O), (O3/O3·-), (Cl2/Cl2·-), (Br2·-/2Br-), (NO2·/NO2-), and (CO3·-/CO32-).
References
Bataineh H.; Pestovsky O.; Bakac A. pH-induced mechanistic changeover from hydroxyl radicals to iron(IV) in the Fenton reaction. Chem. Sci.2012, 3, 1594–1599.Search in Google Scholar
Beckman J. S.; Koppenol W. H. Nitric oxide, superoxide, and peroxynitrite: the good, the bad, and the ugly. Am. J. Physiol. Cell Physiol.1996, 271, C1424–C1437.Search in Google Scholar
Beckman J. S.; Beckman T. W.; Chen J.; Marshall P. A.; Freeman B. A. Apparent hydroxyl radical production by peroxynitrite: implications for endothelial injury from nitric oxide and superoxide. Proc. Natl. Acad. Sci. USA1990, 87, 1620–1624.Search in Google Scholar
Botti H.; Möller M.; Steinmann D.; Nauser T.; Koppenol W. H.; Denicola A.; Radi R. Distance-dependent diffusion-controlled reaction of ·NO and O2·- at chemical equilibrium with ONOO-. J. Phys. Chem. B2010, 114, 16584–16593.Search in Google Scholar
Cohen E. R.; Cvitaš T.; Frey J. G.; Holmström B.; Kuchitsu K.; Marquardt R.; Mills I.; Pavese F.; Quack M.; Stohner, J.; et al. Quantities, Units and Symbols in Physical Chemistry. IUPAC Recommendations 2007, 3rd Edition; RSC Publishing: Cambridge, UK, 2007.Search in Google Scholar
Filipovic M. R.; Miljkovic J. Nauser T.; Royzen M.; Klos K.; Shubina T. E.; Koppenol W. H.; Lippard S. J.; Ivanovic-Burmazovic I. Chemical characterization of the smallest S-nitrosothiol, HSNO; Cellular cross-talk of H2S and S-nitrosothiols. J. Am. Chem. Soc.2012, 134, 12016–12027.10.1021/ja3009693Search in Google Scholar
Koppenol W. H. The Haber-Weiss cycle-70 years later. Redox. Rep.2001, 6, 229–234.10.1179/135100001101536373Search in Google Scholar
Koppenol W. H.; Stanbury D. M.; Bounds P. L. Electrode potentials of partially reduced oxygen species, from dioxygen to water. Free Radical Biol. Med.2010, 49, 317–322.Search in Google Scholar
Lymar S. V.; Hurst J. K. CO2-catalyzed one-electron oxidation by peroxynitrite: Properties of the reactive intermediate. Inorg. Chem.1998, 37, 294–301.Search in Google Scholar
McCord J. M.; Fridovich I. Superoxide dismutase. An enzymic function for erythrocuprein (hemocuprein). J. Biol. Chem.1969, 244, 6049–6055.Search in Google Scholar
Nordlund P.; Reichard P. Ribonucleotide reductases. Annu. Rev. Biochem.2006, 75, 681–707.Search in Google Scholar
Prütz W. A.; Butler J.; Land E. J.; Swallow A. J. The role of sulphur peptide functions in free radical transfer: A pulse radiolysis study. Int. J. Radiat. Biol.1989, 55, 539–556.Search in Google Scholar
Shafirovich V.; Lymar S. V. Nitroxyl and its anion in aqueous solutions: Spin states, protic equilibria, and reactivities toward oxygen and nitric oxide. Proc. Natl. Acad. Sci. USA2002, 99, 7340–7345.10.1073/pnas.112202099Search in Google Scholar
Stanbury D. M. Reduction potentials involving inorganic free radicals in aqueous solution. Adv. Inorg. Chem.1989, 33, 69–138.10.1016/S0898-8838(08)60194-4Search in Google Scholar
Wardman P. Reduction potentials of one-electron couples involving free radicals in aqueous solution. J. Phys. Chem. Ref. Data1989, 18, 1637–1755.10.1063/1.555843Search in Google Scholar
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