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Electron-Transfer Mechanism in Radical-Scavenging Reactions by a Vitamin E Model in a Protic Medium
https://repo.qst.go.jp/records/43640
https://repo.qst.go.jp/records/43640841031fc-de5e-485f-b819-96f50bd4895e
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2005-02-28 | |||||
| タイトル | ||||||
| タイトル | Electron-Transfer Mechanism in Radical-Scavenging Reactions by a Vitamin E Model in a Protic Medium | |||||
| 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_6501 | |||||
| 資源タイプ | journal article | |||||
| 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 |
Nakanishi, Ikuo
× Nakanishi, Ikuo× Kawashima, Tomonori× Ohkubo, Kei× Kanazawa, Hideko× Inami, Keiko× Mochizuki, Masataka× Fukuhara, Kiyoshi× Okuda, Haruhiro× Ozawa, Toshihiko× Itoh, Shinobu× Fukuzumi, Shunichi× Ikota, Nobuo× 中西 郁夫× 川島 知憲× 小澤 俊彦× 伊古田 暢夫 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The scavenging reaction of 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical or galvinoxyl radical by a Vitamin E model, 2,2,5,7,8-pentamethylchroman-6-ol (1H), was significantly acceleratd by the presence of Mg(ClO4)2, in de-aerated methanol (MeOH). Such an acceleration indicates that the radical-scavenging reaction of 1H in MeOH proceeds via an electron transfer from 1H to the radical, followed by a proton toransfer, rather than the one-step hydrogen atom transfer which has been observed in acetonitrile (MeCN). A significant negative shift of the one-electron oxidation potential of 1H in MeOH (0.63 V vs. SCE), due to strong solvation as compared to that in MeCN (0.97 V vs. SCE), may result in change of the radical-scavenging mechanisms between protic and aprotic media. | |||||
| 書誌情報 |
Organic & Biomolecular Chemistry 巻 3, 号 4, p. 626-629, 発行日 2005-02 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1477-0520 | |||||
