| 卟啉铁与抗坏血酸均相电子转移反应的动力学和机理 |
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| 引用本文： | 张红霞,任建国.卟啉铁与抗坏血酸均相电子转移反应的动力学和机理[J].化学研究与应用,2001,13(2):133-136. |
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| 作者姓名： | 张红霞 任建国 |
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| 作者单位： | 1. 山西医科大学药学系,
2. 武汉大学化学系, |
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| 摘 要： | 采用电子吸收光谱和光谱－电化学方法研究了中位－四（邻硝基苯基）四苯并卟啉的Fe(Ⅲ）配合物与抗坏血酸在DMF溶液中的均相电子转移反应的动力学和机理。结果表明此电子转移反应来源于抗坏血酸与铁卟啉中心铁离子的轴向配位作用，并将一个电子转移至铁离子。反应速度对铁卟啉和抗坏血酸均为一级，并与抗坏血酸的离解有关。
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| 关 键 词： | 铁卟啉 抗坏血酸 反应动力学 反应机理 均相电子转移反应 |
| 文章编号： | 1004-1656(2001)02-0133-04 |
| 修稿时间： | 2000年3月7日 |
THE KINETICS AND MECHANISM OF THE HOMOGENEOUS ELECTRON TRANSFER REACTION BETWEEN FERRIC PORPHYRIN AND ASCORBIC ACID |
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| ZHANG Hong-xia,REN Jian-guo.THE KINETICS AND MECHANISM OF THE HOMOGENEOUS ELECTRON TRANSFER REACTION BETWEEN FERRIC PORPHYRIN AND ASCORBIC ACID[J].Chemical Research and Application,2001,13(2):133-136. |
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| Authors: | ZHANG Hong-xia REN Jian-guo |
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| Abstract: | The kinetics and mechanism of the homogeneous electron transfer reaction between ascorbic acid and Fe(Ⅲ) coordination compound of meso-tetra (o-nitrophenyl) tetrabenzoporphyrin (abbr.Fe(Ⅲ)P) were studied by electron absorption spectrum and electrochemistry-spectrum.The results suggest that the electron transfer reaction between ascorbic acid and Fe(Ⅲ)P is associated with an axial coordination of ascorbic acid to the ionic iron in the Fe(Ⅲ)P,during which one electron transfers from ascorbic ion to ionic iron.The reaction orders with respect to both Fe(Ⅲ)P and ascorbic acid are unit,and the reaction rate is influenced by the ascorbic acid dissociation. |
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| Keywords: | ferric porphyrin ascorbic acid reaction kinetics mechanism |
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