Next Article in Journal
Next Article in Special Issue
Previous Article in Journal
Previous Article in Special Issue
Catalysts 2013, 3(1), 232-246; doi:10.3390/catal3010232
Article

Biomimetic Catalysts for Oxidation of Veratryl Alcohol, a Lignin Model Compound

, ,  and *
Received: 21 December 2012; in revised form: 8 February 2013 / Accepted: 17 February 2013 / Published: 4 March 2013
(This article belongs to the Special Issue Biomimetic Catalysts)
View Full-Text   |   Download PDF [316 KB, uploaded 4 March 2013]
Abstract: Kraft pulp has to be bleached to eliminate the chromophoric structures, which cause a darkening of the pulp. In Nature, an equivalent role is assumed by ligninolytic enzymes such as lignin peroxidases, manganese peroxidases and laccases. The development of low molecular weight manganese peroxidase mimics may achieve environmentally-safe bleaching catalysts for the industry. Herein we report the synthesis and characterization of six manganese(III) complexes 16, incorporating dianionic hexadentate Schiff base ligands (H2L1-H2L4) and different anions. Complex 4, Mn2L22(H2O)2(DCA)2 was crystallographically characterized. Complexes 14 behave as more efficient mimics of peroxidase in contrast to 56. We have studied the use of these complexes as catalysts for the degradation of the lignin model compound veratryl alcohol. The biomimetic catalysts were used in conjunction with chlorine-free inexpensive co-oxidants as dioxygen or hydrogen peroxide. Yields up to 30% of veratryl alcohol conversion to veratraldehyde have been achieved at room temperature in presence of air flow using 0.5% of catalyst.
Keywords: manganese; peroxidases; lignin; schiff bases; veratryl alcohol manganese; peroxidases; lignin; schiff bases; veratryl alcohol
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Export to BibTeX |
EndNote


MDPI and ACS Style

González-Riopedre, G.; Fernández-García, M.I.; Gómez-Fórneas, E.; Maneiro, M. Biomimetic Catalysts for Oxidation of Veratryl Alcohol, a Lignin Model Compound. Catalysts 2013, 3, 232-246.

AMA Style

González-Riopedre G, Fernández-García MI, Gómez-Fórneas E, Maneiro M. Biomimetic Catalysts for Oxidation of Veratryl Alcohol, a Lignin Model Compound. Catalysts. 2013; 3(1):232-246.

Chicago/Turabian Style

González-Riopedre, Gustavo; Fernández-García, María I.; Gómez-Fórneas, Esther; Maneiro, Marcelino. 2013. "Biomimetic Catalysts for Oxidation of Veratryl Alcohol, a Lignin Model Compound." Catalysts 3, no. 1: 232-246.


Catalysts EISSN 2073-4344 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert