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A large kinetic isotope effect in the reaction of ascorbic acid with 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide (PTIO˙) in aqueous buffer solutions
https://repo.qst.go.jp/records/80360
https://repo.qst.go.jp/records/80360c87bdb2a-681e-47c1-876f-86fc6ce42591
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-08-17 | |||||
| タイトル | ||||||
| タイトル | A large kinetic isotope effect in the reaction of ascorbic acid with 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide (PTIO˙) in aqueous buffer solutions | |||||
| 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× Shoji, Yoshimi× Ohkubo, Kei× Ozawa, Toshihiko× Ken-ichiro, Matsumoto× Fukuzumi, Shunichi× Ikuo, Nakanishi× Yoshimi, Shoji× Kei, Ohkubo× Toshihiko, Ozawa× Kenichiro, Matsumoto |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | A large kinetic isotope effect (KIE, k(H)/k(D)) of 12.8 was observed for the hydrogen-transfer reaction from ascorbic acid to 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide (PTIO center dot) in a phosphate buffer solution (0.05 M, pH/pD 7.0) at 298 K. The isotopic difference in the activation energies (6.8 kJ mol(-1)) determined from the temperature dependence of the KIE suggests that quantum mechanical tunneling may partly play a role in the reaction, although the isotopic ratio of the Arrhenius prefactor (A(H)/A(D) = 0.86) is within the semiclassical limits. | |||||
| 書誌情報 |
Chemical Communications 巻 56, 号 77, p. 11505-11507, 発行日 2020-09 |
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| 出版者 | ||||||
| 出版者 | The Royal Society of Chemistry | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1359-7345 | |||||
| PubMed番号 | ||||||
| 識別子タイプ | PMID | |||||
| 関連識別子 | 32945829 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1039/D0CC05214K | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://pubs.rsc.org/en/content/articlelanding/2020/cc/d0cc05214k#!divAbstract | |||||
