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Electron Transfer from Stable Superoxide Complex to electron Acceptors as Benzoquinone Derivatives
https://repo.qst.go.jp/records/70341
https://repo.qst.go.jp/records/703418d4f4797-c843-4a57-b203-eda032798e45
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2010-11-30 | |||||
| タイトル | ||||||
| タイトル | Electron Transfer from Stable Superoxide Complex to electron Acceptors as Benzoquinone Derivatives | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Kawashima, Tomonori
× Kawashima, Tomonori× Ohkubo, Kei× Fukuzumi, Shunichi× Nakanishi, Ikuo× 川島 知憲× 中西 郁夫 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | 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. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | SFRBM/SFRRI 2010 | |||||
| 発表年月日 | ||||||
| 日付 | 2010-11-21 | |||||
| 日付タイプ | Issued | |||||
