| 分光光度法研究Cr(VI)氧化苹果酸及乙二醇的催化反应动力学 |
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| 引用本文： | 范立,单金缓. 分光光度法研究Cr(VI)氧化苹果酸及乙二醇的催化反应动力学[J]. 广东化工, 2010, 0(11): 5-6 |
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| 作者姓名： | 范立 单金缓 |
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| 作者单位： | 西南科技大学国防科技学院;河北大学化学与环境科学学院; |
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| 基金项目： | 校青年基金项目(10zx3135) |
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| 摘 要： | 文章采用分光光度法研究了酸性介质中,2,2’-联吡啶(bpy)催化Cr(VI)氧化苹果酸(Mal)及乙二醇的反应动力学,分别考察了两种[R]、[H+]、[bpy]]对kobs的影响。结果表明:反应对Cr(VI)是准一级,对苹果酸及乙二醇均是一级。在保持准一级反应条件([还原剂]0[Cr(VI)0)下,该反应的表观速率常数kobs都随[H+]、[bpy]的增加而增大。通过比较Cr(VI)氧化苹果酸及二元醇的反应,发现同一温度下乙二醇的速率常数大于苹果酸的速率常数。
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| 关 键 词： | Cr（VI） 2,2’-联吡啶 苹果酸 乙二醇 催化动力学 |
Kinetics of Catalyzed the Cr (VI) Oxidation of Malic Acid and Glycol with Spectrophotometry |
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| Fan Li,Shan Jinhuan. Kinetics of Catalyzed the Cr (VI) Oxidation of Malic Acid and Glycol with Spectrophotometry[J]. Guangdong Chemical Industry, 2010, 0(11): 5-6 |
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| Authors: | Fan Li Shan Jinhuan |
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| Affiliation: | Fan Li1,Shan Jinhuan2(1.School of National Defense Science and Technology,Southwest University of Science and Technology,Mianyang 621010,2.College of Chemistry and Environmental Science,Hebei University,Baoding 071002,China) |
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| Abstract: | The kinetics of 2,2'-bipyridyl catalysis of the Cr (VI) oxidation of Malic Acid and glycol in aqueous acidic medium were studied by spectrophotometrically.The change of kobs with different [R],[H+],[bpy] were studied.The reaction showed pseudo-first order with respect to Cr (VI) and first order to Malic Acid and glycol also.Under the conditions of pseudo-first order ([R]0 >> [Cr(VI)]0),the observed rate constant (kobs) increased with the increase in [H+] and [bpy].Comparing Malic Acid with glycol,author fin... |
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| Keywords: | Cr(VI) 2 2'-bipyridyl malic acid glycol catalytic kinetics |
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