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HERO ID
3044593
Reference Type
Journal Article
Title
INVESTIGATION ON THE HYDROGEN ABSTRACTION FROM METHYL GLUCOSIDE BY ACTIVE OXYGEN SPECIES UNDER OXYGEN DELIGNIFICATION CONDITIONS. PART 5: COMPREHENSIVE RESULTS ON EXPERIMENTS USING DEUTERIUM-LABELED METHYL GLUCOSIDES
Author(s)
Yokoyama, T; Nakagawa, A; Matsumoto, Y
Year
2015
Is Peer Reviewed?
1
Journal
Journal of Wood Chemistry and Technology
ISSN:
0277-3813
Volume
35
Issue
6
Page Numbers
450-463
DOI
10.1080/02773813.2015.1039134
Web of Science Id
WOS:000362649600006
Abstract
A pair of carbohydrate model compounds, methyl beta-D-glucopyranoside (MGP) and a deuterated MGP labeled at each C-H bond, was reacted with active oxygen species (AOS) generated from reactions between O-2 and a co-existing phenolic compound, 2,4,6-trimethylphenol (TMPh) or 4-hydroxy-3-methoxybenzyl alcohol (vanillyl alcohol, Valc), under O-2 delignification conditions. The pair were also reacted with O radical anion generated in the alkaline H2O2 treatment with the addition of FeCl3. Clear kinetic isotope effects were observed only in the reactions of two pairs using the deuterated MGPs labeled at the anomeric and C-2 positions in this system. These results suggest that at least a specific AOS is generated only in this system and that a major AOS in the O(2)(-)Valc system is highly reactive O radical anion It is also suggested that the AOS specifically generated only in this system is a peroxyl radical derived by the combination reaction between the TMPh phenoxyl radical and O-2.
Keywords
Bleaching; cellulose; lignin; oxidation; pulp
Tags
IRIS
•
Trimethylbenzenes (Interagency Science Discussion Draft)
Literature Search Update
Literature Search Update- Excluded
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Chemistry or Physical or Engineering
•
Trimethylbenzenes (TMB)
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