Oxidation of 2-aminophenol with molecular oxygen and hydrogen peroxide catalyzed by water soluble metalloporphyrins

被引：21
作者：
El-Khalafy, Sahar H. [1 ]
Hassanein, M. [1 ]
机构：
[1] Tanta Univ, Fac Sci, Dept Chem, Tanta 31527, Egypt
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2012年 / 363卷
关键词：
Catalytic oxidation; 2-Aminophenol; Metalloporphyrins; 2-Aminophenoxazine-3-one; MANGANESE(III) PORPHYRIN; COMPLEXES; MECHANISM; DIOXYGEN; KINETICS; HYDROXYLATION; ACTIVATION; ALKANES;
D O I：
10.1016/j.molcata.2012.06.002
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
5,10,15,20-Tetrakis-(p-sulfonatophenyl)porphinatocobalt(II) and 5,10,15,20-tetrakis-(p-sulfonatophenyl)porphinatomanganese(III) chloride have been used as catalysts for the oxidative coupling of 2-aminophenol to 2-aminophenoxazine-3-one with molecular oxygen and hydrogen peroxide. The effects of pH and concentration of catalysts, hydrogen peroxide and oxygen on the oxidation reaction and yield of 2-aminophenoxazine-3-one have been studied. The oxidation of 2-aminophenol with molecular oxygen catalyzed by cobalt(II) tetra(4-sulfophenyl)porphyrin involves a hydrogen atom abstraction from 2-aminophenol by cobalt(II) superoxo species. UV-vis analysis indicated that oxomanganese(IV) is the active species in the oxidation of 2-aminophenol with hydrogen peroxide and manganese(III)tetra(4-sulfophenyl)porphyrin. (c) 2012 Elsevier B.V. All rights reserved.
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页码：148 / 152
页数：5
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