The immobilized porphyrin-mediator system Mn(TMePyP)/clay/HBT (clay-PMS): A lignin peroxidase biomimetic catalyst in the oxidation of lignin and lignin model compounds

被引：36

作者：

Crestini, C ^{[1
]}

Pastorini, A ^{[1
]}

Tagliatesta, P ^{[1
]}

机构：

[1] Univ Roma Tor Vergata, Dept Sci & Technol Chim, I-00133 Rome, Italy

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2004年 / 22期

关键词：

clays; lignin models; oxidation; porphyrins; supported catalysts;

D O I：

10.1002/ejic.200400351

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A biomimetic system for lignin peroxidase (LiP) was designed by using a cationic porphyrin, [Mn(TMePyP)OAc5], supported on the smectitic clay montraorillonite [Mn(TMePyP)/clay]. The natural role of the polypeptidic pocket of UP was mimicked by the clay. The possibility to use low-molecular-weight redox mediators as active readily diffusible oxidizing species has been investigated. This assembly - a sort of "synthetic enzyme" - can be defined as an immobilized porphyrin-mediator system (clay-PMS). The clay-PMS was found to be a stable, recyclable, and efficient catalyst for the environmentally friendly H2O2-catalyzed oxidation of different lignins and representative lignin model compounds. The clay-PMS showed a higher reactivity than Mn(TMePyP)/clay alone due to an effective role of the redox mediator on the oxidation. (C)Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.

引用

页码：4477 / 4483

页数：7

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