%0 Journal Article %1 Contreras.2007 %A Contreras, David %A Rodriguez, Jaime %A Freer, Juanita %A Schwederski, Brigitte %A Kaim, Wolfgang. %D 2007 %J JBIC, Journal of Biological Inorganic Chemistry %K Fenton biodegrdn dihydroxybenzene hydroxyl prodn radical reaction wood %N 7 %P 1055--1061 %R 10.1007/s00775-007-0274-2 %T Enhanced hydroxyl radical production by dihydroxybenzene-driven Fenton reactions: Implications for wood biodegradation %V 12 %X Brown rot fungi degrade wood, in initial stages, mainly through hydroxyl radicals (·OH) produced by Fenton reactions. These Fenton reactions can be promoted by dihydroxybenzenes (DHBs), which can chelate and reduce Fe(III), increasing the reactivity for different substrates. This mechanism allows the extensive degrdn. of carbohydrates and the oxidn. of lignin during wood biodegrdn. by brown rot fungi. To understand the enhanced reactivity in these systems, kinetics expts. were carried out, measuring ·OH formation by the spin-trapping technique of ESR spectroscopy. As models of the fungal DHBs, 1,2-dihydroxybenzene (catechol), 2,3-dihydroxybenzoic acid and 3,4-dihydroxybenzoic acid were utilized as well as 1,2-dihydroxy-3,5-benzenedisulfonate as a non-Fe(III)-reducing substance for comparison. Higher amts. and maintained concns. of ·OH were obsd. in the driven Fenton reactions vs. the unmodified Fenton process. A linear correlation between the logarithms of complex stability consts. and the ·OH prodn. was obsd., suggesting participation of such complexes in the radical prodn. [on SciFinder(R)]

@article{Contreras.2007, abstract = {Brown rot fungi degrade wood, in initial stages, mainly through hydroxyl radicals (·OH) produced by Fenton reactions. These Fenton reactions can be promoted by dihydroxybenzenes (DHBs), which can chelate and reduce Fe(III), increasing the reactivity for different substrates. This mechanism allows the extensive degrdn. of carbohydrates and the oxidn. of lignin during wood biodegrdn. by brown rot fungi. To understand the enhanced reactivity in these systems, kinetics expts. were carried out, measuring ·OH formation by the spin-trapping technique of ESR spectroscopy. As models of the fungal DHBs, 1,2-dihydroxybenzene (catechol), 2,3-dihydroxybenzoic acid and 3,4-dihydroxybenzoic acid were utilized as well as 1,2-dihydroxy-3,5-benzenedisulfonate as a non-Fe(III)-reducing substance for comparison. Higher amts. and maintained concns. of ·OH were obsd. in the driven Fenton reactions vs. the unmodified Fenton process. A linear correlation between the logarithms of complex stability consts. and the ·OH prodn. was obsd., suggesting participation of such complexes in the radical prodn. [on SciFinder(R)]}, added-at = {2022-06-15T11:26:56.000+0200}, author = {Contreras, David and Rodriguez, Jaime and Freer, Juanita and Schwederski, Brigitte and Kaim, Wolfgang.}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/28f439347521fcb753de198ed44571d6f/huebleriac}, doi = {10.1007/s00775-007-0274-2}, interhash = {a17688b468130c97e4cae27f30994960}, intrahash = {8f439347521fcb753de198ed44571d6f}, issn = {0949-8257}, journal = {JBIC, Journal of Biological Inorganic Chemistry}, keywords = {Fenton biodegrdn dihydroxybenzene hydroxyl prodn radical reaction wood}, number = 7, pages = {1055--1061}, timestamp = {2022-06-15T09:26:56.000+0200}, title = {Enhanced hydroxyl radical production by dihydroxybenzene-driven Fenton reactions: Implications for wood biodegradation}, volume = 12, year = 2007 }