| N,N-二甲基羟基胺与V(Ⅴ)氧化还原反应动力学及机理研究 |
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| 引用本文： | 张安运,厉凯,何辉,胡景,张先业,王方定.N,N-二甲基羟基胺与V(Ⅴ)氧化还原反应动力学及机理研究[J].应用化学,2001,18(3):180-0. |
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| 作者姓名： | 张安运 厉凯 何辉 胡景 张先业 王方定 |
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| 作者单位： | 1. 陕西师范大学化学系 西安 710062
2. 中国原子能科学研究院 北京 |
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| 基金项目： | 国家“九五”重点科技攻关项目(Y5551)；核工业科学基金课题(H7196No123) |
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| 摘 要： | 二甲基羟胺;反应机理;N;N-二甲基羟基胺与V(Ⅴ)氧化还原反应动力学及机理研究
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| 关 键 词： | 二甲基羟胺 反应机理 N N-二甲基羟基胺与V(Ⅴ)氧化还原反应动力学及机理研究 |
| 文章编号： | 1000-0518(2001)03-0180-04 |
| 收稿时间： | 2009-06-29 |
| 修稿时间： | 2000年6月20日 |
Kinetics and Mechanism of
Redox Reaction Between N,N-Dimethylhydroxylamine and Vanadium( |
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| ZHANG An Yun ,LI Kai.Kinetics and Mechanism of
Redox Reaction Between N,N-Dimethylhydroxylamine and Vanadium([J].Chinese Journal of Applied Chemistry,2001,18(3):180-0. |
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| Authors: | ZHANG An Yun LI Kai |
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| Institution: | ZHANG An Yun *,LI Kai |
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| Abstract: | The kinetics and mechanism of the redox reaction betweenN,N-dimethylhydroxylamine(DMHA) and vanadium(Ⅴ) in nitric acid medium at 25.2 ℃ have been studied by spectrophotometry. By investigating the influences of the DMHA concentration, solutio acidity and reaction temperature on the reaction, the reaction rate equation is found to be -dV(Ⅴ)]/dt=kV(Ⅴ)]DMHA] where the k is calculated to be (9.95±1.0) L2/(mol2.s), ΔE=22.1 kJ/mol under experiment conditions.A single-electron transfer mechanism has been suggested based on the ESR results of (CH3)2N.O radical. The following reaction is the rate controlling step: HO—V—O…H…O—N(CH3)2]2+→ (CH3)2O+H2O+VO2+ |
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