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ESR study of lignin model compounds irradiated by UV (254nm photons) in the presence of hydrogen peroxide

Citation

Sun, Y-P and Yates, BF and Abbot, J and Chen, C-L, ESR study of lignin model compounds irradiated by UV (254nm photons) in the presence of hydrogen peroxide, Holzforschung, 50, (3) pp. 233-236. ISSN 0018-3830 (1996) [Refereed Article]

DOI: doi:10.1515/hfsg.1996.50.3.233

Abstract

ESR spectra of acetovanillone and trans-ferulic acid, lignin model compounds, were measured in aqueous solution at different pH values under UV (254nm photon) irradiation with or without hydrogen peroxide. The intensity of radicals in the irradiated samples was strongly dependent on the concentration of both sodium hydroxide and hydrogen peroxide. Ionization of the phenolic hydroxyl group in the model compounds plays an important role in the formation of phenoxyl radicals under the UV irradiation. The presence of hydrogen peroxide enhanced the formation of phenoxyl radicals in the alkaline pH.

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Physical Chemistry (incl. Structural)
Research Field:Catalysis and Mechanisms of Reactions
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Yates, BF (Professor Brian Yates)
ID Code:8638
Year Published:1996
Web of Science® Times Cited:4
Deposited By:Chemistry
Deposited On:1996-08-01
Last Modified:2011-08-19
Downloads:0

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