@misc{oai:repo.qst.go.jp:00070341,
 author = {Kawashima, Tomonori and Ohkubo, Kei and Fukuzumi, Shunichi and Nakanishi, Ikuo and 川島 知憲 and 中西 郁夫},
 month = {Nov},
 note = {Superoxide ion (O2•–) is important as the product of the one-electron reduction of dioxygen, which occurs widely in nature.  O2•– forms a stable 1:1 complex with scandium hexamethylphosphoric triamide [Sc(HMPA)33+], which can be detected by ESR in solution at ambient temperature.  We report the kinetics and mechanism of electron-transfer reactions from the O2•––Sc(HMPA)33+ complex to a series of electron acceptors:  p-benzoquinone derivatives, such as p-benzoquinone and coenzyme Q10.  Electron transfer from the O2•––Sc(HMPA)33+ complex top-benzoquinone derivatives occurred, accompanied by binding of Sc(HMPA)33+ to the corresponding semiquinone radical anion complex to produce the semiquinone radical anion-Sc(HMPA)33+ complexes.  There are two reaction pathways, in the Sc(HMPA)33+-coupled electron transfer.  One is a stepwise pathway, in which the binding of Sc(HMPA)33+ to semiquinone radical anions occurs after the electron transfer.  The other is a concerted pathway in which electron transfer and the binding of Sc(HMPA)33+ occurs in a concerted manner., SFRBM/SFRRI 2010},
 title = {Electron Transfer from Stable Superoxide Complex to electron Acceptors as Benzoquinone Derivatives},
 year = {2010}
}