RADIATION-INDUCED EFFECTS IN LIGNIN MODEL COMPOUNDS - A PULSE AND STEADY-STATE RADIOLYSIS STUDY

Authors
CHUAQUI CA RAJAGOPAL S KOVACS A STEPANIK T MERRITT J GYORGY I WHITEHOUSE R EWING D
Citation
Ca. Chuaqui et al., RADIATION-INDUCED EFFECTS IN LIGNIN MODEL COMPOUNDS - A PULSE AND STEADY-STATE RADIOLYSIS STUDY, Tetrahedron, 49(43), 1993, pp. 9689-9698
Citations number
22
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron → ACNP
ISSN journal
00404020
Volume
49
Issue
43
Year of publication
1993
Pages
9689 - 9698
Database
ISI
SICI code
0040-4020(1993)49:43<9689:REILMC>2.0.ZU;2-K
Abstract
A lignin model compound beta-(2-methoxyphenoxy)-3,4-dimethoxyacetophen one (I) was subjected to Co-60 gamma irradiation and pulse radiolysis under different conditions (dose, medium, pH). Interaction with hydrox yl radicals resulted in aryl hydroxylation, fragmentation, and cleavag e. A hydroxylation-cleavage pathway was found at all pH values. At alk aline pH, fragmentation reactions were also observed. The predominant reaction with solvated electrons was fragmentation of the beta-aryl et her bond followed by cleavage reactions.