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α-生育酚与自由基DPPH~·的反应机理研究
The Mechanism of a Reaction between α-Tocopherol and DPPH~· Studied by NMR and ESR Spectroscopy
【摘要】 通过NMR产物分析方法确认α-生育酚与DPPH·在DMSO中的反应最终产物结构为醌式.此外,对该反应过程的ESR实验证实α-生育酚与DPPH·反应的计量比为1∶2.由此可以进一步推断:α-生育酚与DPPH·反应的分子机制为两步过程.
【Abstract】 In this paper the reaction product of α-tocopherol and DPPH· radical in DMSO was analyzed by NMR spectroscopy,and found to have a tetraalkylbenzoquinonoid group.The reactive ratio of α-tocopherol to DPPH· was confirmed to be 1∶2 with ESR spectroscopy.Based on these two results,it is proposed that the reaction pathway of α-tocopherol and DPPH· has two steps.
【关键词】 NMR;
ESR;
反应机理;
α-生育酚;
DPPH~·;
【Key words】 NMR; ESR; reaction mechanism; α-tocopherol; DPPH~·;
【Key words】 NMR; ESR; reaction mechanism; α-tocopherol; DPPH~·;
【基金】 国家自然科学基金资助项目(30570446)
- 【文献出处】 波谱学杂志 ,Chinese Journal of Magnetic Resonance , 编辑部邮箱 ,2008年03期
- 【分类号】R96
- 【被引频次】33
- 【下载频次】553