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5,10,15,20-Tetrakis(4-sulfonato-phenyl)porphine-Mn(III) immobilized on imidazole-activated silica as a novel lignin-peroxidase-like biomimetic catalyst

✍ Scribed by Paolo Zucca; Giuseppe Mocci; Antonio Rescigno; Enrico Sanjust

Book ID: 103834807
Publisher: Elsevier Science
Year: 2007
Tongue: English
Weight: 512 KB
Volume: 278
Category: Article
ISSN: 1381-1169
DOI: 10.1016/j.molcata.2007.09.017

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✦ Synopsis

In this study a new biomimetic lignin-peroxidase-like catalyst was investigated. Such a heterogeneous catalyst could be of potential interest for oxidative degradation of plant effluents, containing soluble lignin derivatives. 5,10,15,20-Tetrakis(4-sulfonato-phenyl)porphine-Mn(III) was coordinated to imidazole-bearing silica to give a stable adduct; by contrast, the metalloporphine did not significantly interact with plain silica gel or aminopropylsilica. The adduct showed a remarkable ability to catalyze veratryl alcohol oxidation at the expenses of H 2 O 2 . Kinetic and operational characterisation of the catalyst is also reported.

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