METHYL RADICALS MIGRATION IN GLASSY ETHANOL-1,2D(5) AT 90 K AS STUDIED BY HYDROGEN-ATOM ABSTRACTION FROM THE ADDITIVES

Citation
Vl. Vyazovkin et Va. Tolkatchev, METHYL RADICALS MIGRATION IN GLASSY ETHANOL-1,2D(5) AT 90 K AS STUDIED BY HYDROGEN-ATOM ABSTRACTION FROM THE ADDITIVES, Chemical physics, 216(1-2), 1997, pp. 135-145
Citations number
35
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
ISSN journal
03010104
Volume
216
Issue
1-2
Year of publication
1997
Pages
135 - 145
Database
ISI
SICI code
0301-0104(1997)216:1-2<135:MRMIGE>2.0.ZU;2-Z
Abstract
ESR technique has been used to study the kinetics of methyl radicals d ecay at 90 K in glassy ethanol-1,2d(5) with an admixture of diethyl et her and C2H5OH ethyl alcohol. It has been demonstrated that methyl rad icals migrate freely throughout the sample. The migration rate strongl y depends on sample prehistory. The preliminary annealing at reaction temperature and/or the spontaneous cracking of matrix lead to a decrea se in migration rate. The experiments indicate that the mechanism of r adical migration in glassy ethanol differs considerably from that in g lassy methanol. The probable reasons for this difference have been con sidered. (C) 1997 Elsevier Science B.V.