A Mn(IV)-Me4DTNE complex catalyzed oxidation of lignin model compounds with hydrogen peroxide

被引：29

作者：

Cui, Y

Chen, CL ^{[1
]}

Gratzl, JS

Patt, R

机构：

[1] N Carolina State Univ, Dept Wood & Paper Sci, Raleigh, NC 27695 USA

[2] Univ Hamburg, Inst Wood Technol & Wood Chem, D-21031 Hamburg, Germany

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 1999年 / 144卷 / 03期

关键词：

Mn complexes; catalysis; hydrogen peroxide; oxidation; lignin model compounds;

D O I：

10.1016/S1381-1169(99)00042-4

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：

1-(3,4-dimethoxyphenyl)ethanol. 1-(3,4-dimethoxyphenyl)-1-propene (mixture of E- and Z-isomers) and E-1,2-diphenylethene were chosen as model compounds to investigate the reactivity of lignin toward hydrogen peroxide catalyzed by [L'Mn(IV)(mu-O)(3)Mn(IV)](ClO4)(2) where L' is 1,2-bis-(4,7-dimethyl-1,4,7-triazacyclonon-1-yl)ethane. All the model compounds investigated were readily oxidized to a significant extent by hydrogen peroxide when catalyzed by this complex. The reaction products were identified by GCMS, and the reaction kinetics was studied. Based on these results, the mechanisms of the reactions have been elucidated. The catalyst preferentially epoxidates C-C double bonds conjugated with aromatic moieties. The activation energy of the reactions was determined. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：411 / 417

页数：7

共 24 条

[1] IRON PORPHYRIN-CATALYZED OXIDATION OF 1,2-DIMETHOXYARENES - A DISCUSSION OF THE DIFFERENT REACTIONS INVOLVED AND THE COMPETITION BETWEEN THE FORMATION OF METHOXYQUINONES OR MUCONIC DIMETHYL ESTERS [J].