| KINETICS AND MECHANISM OF THE DEMETALIZATION OF Mo(V)PORPHYRIN CATALYZED BY VITAMIN C |
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| 引用本文： | 罗仁生,任建国,秦子斌. KINETICS AND MECHANISM OF THE DEMETALIZATION OF Mo(V)PORPHYRIN CATALYZED BY VITAMIN C[J]. 武汉理工大学学报(材料科学英文版), 1994, 0(3) |
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| 作者姓名： | 罗仁生 任建国 秦子斌 |
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| 作者单位： | Luo RenshengMater. Sci. Dept.，Wuhan University of Technology，Wuhan，430070.P. R. ChinaRen Jianguo Qin ZibinChemistry Department，Wuhan University，Wuhan，430070，P. R. China |
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| 摘 要： | The kinetics of the reduction and demetalization ofhydroxooxo [5,10,15,20-tetrakis(p-sulfonatophenyl)porphyrinato] molybdenum(V), OMo (V) (OH) TPPS, by ascorbicacid (i. e. Vitamine C,abbr. H_2Asc), have been studied in aqueous so-lutions, I=0. 10(KCl) at 30 or 35℃. The reactions were run underpseudo-first-order conditions with ascorbic acid in at least 30 foldexcess over Mo-porphyrin. Pseudo-first-order rate constants, k_(obsd),obtained by monitoring the appearance of TPPS peak at 413. 3mm.The experimental data give a good fit to d[TPPS]/dt = (k_1+k_2[OH~-]K_3Ka_2[H_2Asc]/(Ka_2+[H~+])) [Mo(V)P] (1)where P rep-resents the porphyrin, the rate constants K_1, K_2, K_3 and Ka_2 are K_1=2. 185×10~(-3),K_2=3. 624×10~(-2),K_3=3. 210,Ka_2=1.29×10~(-12)at 35℃.
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KINETICS AND MECHANISM OF THE DEMETALIZATION OF Mo(V) PORPHYRIN CATALYZED BY VITAMIN C |
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| Luo RenshengMater. Sci. Dept.,Wuhan University of Technology,Wuhan,.P. R. ChinaRen Jianguo Qin ZibinChemistry Department,Wuhan University,Wuhan,,P. R. China. KINETICS AND MECHANISM OF THE DEMETALIZATION OF Mo(V) PORPHYRIN CATALYZED BY VITAMIN C[J]. Journal of Wuhan University of Technology. Materials Science Edition, 1994, 0(3) |
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| Authors: | Luo RenshengMater. Sci. Dept. Wuhan University of Technology Wuhan .P. R. ChinaRen Jianguo Qin ZibinChemistry Department Wuhan University Wuhan P. R. China |
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| Affiliation: | Luo RenshengMater. Sci. Dept.,Wuhan University of Technology,Wuhan,430070.P. R. ChinaRen Jianguo Qin ZibinChemistry Department,Wuhan University,Wuhan,430070,P. R. China |
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| Abstract: | |
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| Keywords: | demetalization vitamin c catalysis |
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