|
|||||
|
|
| SUDS胶束中维生素C生物抗氧化 反应动力学的停流ESR研究 | |
| 引用本文： | 俞开潮,周锦兰,刘中立,陈平,韩正旭.SUDS胶束中维生素C生物抗氧化 反应动力学的停流ESR研究[J].武汉大学学报(理学版),2001,47(2):177-181. |
| 作者姓名： | 俞开潮 周锦兰 刘中立 陈平 韩正旭 |
| 作者单位： | 1. 华中科技大学 化学系;兰州大学 2. 武汉工业学院 饲料系, 3. 兰州大学 |
| 基金项目： | 湖北省自然科学基金(99J067)；兰州大学应用有机化学国家重点实验室开放基金；华中科技大学科技基金资助项目 |
| 摘 要： | 用停止-流动ESR实验技术研究了在近中性条件下，1-十一烷基-十二烷基硫酸钠（SUDS）负离子胶束的形成及在此胶束中，维生素C还原4-羟基-2，2，6，6-四甲基哌啶-1-氧自由基（HO-TEMPO）及其亲脂性衍生物4-己酰氧基-TEMPO（C |
| 关 键 词： | 停止-流动ESR技术 胶束 氮氧自由基 维生素C 生物抗氧化 |
| 文章编号： | 0253-9888(2001)02-0177-05 |
| 修稿时间： | 2000年6月20日 |
Kinetic ESR Studies on the Reaction of Vitamin C with 4-TEMPOL Radical and Its Lipophilic Derivatives in Sodium 1-Undecyldodecyl Sulfate (SUDS) Micelles |
|
| YU Kai-chao ,ZHOU Jin-lan ,LIU Zhong-li ,CHEN Ping ,HAN Zhen-xu.Kinetic ESR Studies on the Reaction of Vitamin C with 4-TEMPOL Radical and Its Lipophilic Derivatives in Sodium 1-Undecyldodecyl Sulfate (SUDS) Micelles[J].JOurnal of Wuhan University:Natural Science Edition,2001,47(2):177-181. | |
| Authors: | YU Kai-chao ZHOU Jin-lan LIU Zhong-li CHEN Ping HAN Zhen-xu |
| Institution: | YU Kai-chao 1,2,ZHOU Jin-lan 3,LIU Zhong-li 2,CHEN Ping 2,HAN Zhen-xu 2 |
| Abstract: | The kinetics of the reactions between ascorbic acid (VC) and nitroxides (4-hydroxy-TEMPO or HO-TEMPO,4-hexanoyloxy-TEMPO or C6-TEMPO and Palmitoyoxy-TEMPO or C16-TEMPO) in sodium 1-undecyldodecyl sulfate (SUDS) micelles were studied by stopped-flow ESR technique with the aim of investigating the microenvironment effect of these reactions. The second-order rate constants of these reactions were found to be 4.9, 1.6 and 0.22 L*mol－1*s-1 for HO-TEMPO, C6-TEMPO and C16-TEMPO, respectively, indicating the dependence of the reactivity on the length of the side chain of the nitroxides. Kinetic analysis shows that the structure and essence of the microenvironment also has influences on the reactivity of antioxidants. |
| Keywords: | stopped-flow ESR(electron spin resonance) technique micelles nitroxide ascorbic acid bio-antioxidation |
| 本文献已被 万方数据 等数据库收录！ | |