期刊
INORGANIC CHEMISTRY
卷 52, 期 6, 页码 3094-3101出版社
AMER CHEMICAL SOC
DOI: 10.1021/ic302573x
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资金
- MEXT, Japan [20108010]
- KRF/MEST of Korea through CRI
- KRF/MEST of Korea through GRL [2010-00353]
- KRF/MEST of Korea through WCU [R31-2008-000-10010-0]
- JSPS
- Grants-in-Aid for Scientific Research [20108010] Funding Source: KAKEN
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 [Fe-III(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-MeC6H4SO3-), NsO(-) (o-NO2C6H4SO3-), DNsO(-) (2,4-(NO2)(2)C6H3SO3-), 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 Fe-III-OH complex was coupled with the deprotonation process by proton acceptors in which deuterium kinetic isotope effects were observed when H2O was replaced by D2O.
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