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Effects of proton acceptors on formation of a non-heme iron(IV)-oxo complex via proton-coupled electron transfer

Title
Effects of proton acceptors on formation of a non-heme iron(IV)-oxo complex via proton-coupled electron transfer
Authors
Nishida Y.Morimoto Y.Lee Y.-M.Nam W.Fukuzumi S.
Ewha Authors
남원우Shunichi Fukuzumi이용민
SCOPUS Author ID
남원우scopus; Shunichi Fukuzumiscopus; 이용민scopusscopus
Issue Date
2013
Journal Title
Inorganic Chemistry
ISSN
0020-1669JCR Link
Citation
vol. 52, no. 6, pp. 3094 - 3101
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Rates of formation of a non-heme iron(IV)-oxo complex, [Fe IV(O)(N4Py)]2+ (N4Py = N,N-bis(2-pyridylmethyl)-N-bis(2- pyridyl)methylamine), via electron-transfer oxidation of [FeIII(OH) (N4Py)]2+ in acetonitrile (MeCN) containing H2O (0.56 M) were accelerated as much as 390-fold by addition of proton acceptors such as CF3COO-, TsO- (p-MeC6H 4SO3 -), NsO- (o-NO2C 6H4SO3 -), DNsO- (2,4-(NO2)2C6H3SO3 -), and TfO- (CF3SO3 -). The acceleration effect of proton acceptors increases with increasing basicity of the proton acceptors. The one-electron oxidation potential of [Fe III(OH)(N4Py)]2+ was shifted from 1.24 to 0.96 V vs SCE in the presence of TsO- (10 mM). The electron-transfer oxidation of FeIII-OH complex was coupled with the deprotonation process by proton acceptors in which deuterium kinetic isotope effects were observed when H 2O was replaced by D2O. © 2013 American Chemical Society.
DOI
10.1021/ic302573x
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자연과학대학 > 화학·나노과학전공 > Journal papers
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