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Metal Ion-Coupled Electron Transfer of a Nonheme Oxoiron(IV) Complex: Remarkable Enhancement of Electron-Transfer Rates by Sc 3+

2010; American Chemical Society; Volume: 133; Issue: 3 Linguagem: Inglês

10.1021/ja109056x

1943-2984

Yuma Morimoto, Hiroaki Kotani, Jiyun Park, Yong‐Min Lee, Wonwoo Nam, Shunichi Fukuzumi,

Metal complexes synthesis and properties

Rates of electron transfer from a series of one-electron reductants to a nonheme oxoiron(IV) complex, [(N4Py)FeIV(O)]2+, are enhanced as much as 108-fold by addition of metal ions such as Sc3+, Zn2+, Mg2+, and Ca2+; the metal ion effect follows the Lewis acidity of metal ions. The one-electron reduction potential of [(N4Py)FeIV(O)]2+ is shifted to a positive direction by 0.84 V in the presence of Sc3+ ion (0.20 M).