Ruthenium complexes of Schiff base ligands as efficient catalysts for catechol-hydrogen peroxide reaction

被引：15

作者：

Chittilappilly, Pearly Sebastian ^{[1
,2
]}

Sridevi, N. ^{[1
]}

Yusuff, K. K. Mohammed ^{[1
]}

机构：

[1] Cochin Univ Sci & Technol, Dept Appl Chem, Kochi 682022, India

[2] St Josephs Coll, Dept Chem, Irinjalakuda 680121, India

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2008年 / 286卷 / 1-2期

关键词：

zeolite-encapsulated complexes; ruthenium(III); Schiff base; catechol oxidation; catalysis;

D O I：

10.1016/j.molcata.2008.02.002

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：

Zeolite Y-encapsulated ruthenium(III) complexes of Schiff bases derived from 3-hydroxyquinoxaline-2-carboxaldehyde and 1,2-phenylenediamine, 2-aminophenol, or 2-aminobenzimidazole (RuYqpd, RuYqap and RuYqab, respectively) and the Schiff bases derived from salicylaldehyde and 1,2-phenylenediamine, 2-aminophenol, or 2-aminobenzimidazole (RuYsalpd, RuYsalap and RuYsalab, respectively) have been prepared and characterized. These complexes, except RuYqpd, catalyze catechol oxidation by H2O2 selectively to 1,2,4-trihydroxybenzene. RuYqpd is inactive. A comparative study of the initial rates and percentage conversion of the reaction was done in all cases. Turn over frequency of the catalysts was also calculated. The catalytic activity of the complexes is in the order RuYqap > RuYqab for quinoxaline-based complexes and RuYsalap > RuYsalpd > RuYsalab for salicylidene-based complexes. The reaction is believed to proceed through the formation of a Ru(V) species. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：92 / 97

页数：6

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