ESR STUDIES OF NITROXYL RADICALS TEMPON AND M-DINITROBENZENE MOLECULES ADSORBED ON GAMMA-AL2O3

Authors
KONOVALOVA TA BEDILO AF VOLODIN AM
Citation
Ta. Konovalova et al., ESR STUDIES OF NITROXYL RADICALS TEMPON AND M-DINITROBENZENE MOLECULES ADSORBED ON GAMMA-AL2O3, Reaction kinetics and catalysis letters, 51(1), 1993, pp. 81-86
Citations number
15
Categorie Soggetti
Chemistry Physical
Journal title
Reaction kinetics and catalysis letters → ACNP
ISSN journal
01331736
Volume
51
Issue
1
Year of publication
1993
Pages
81 - 86
Database
ISI
SICI code
0133-1736(1993)51:1<81:ESONRT>2.0.ZU;2-V
Abstract
The adsorption of nitroxyl radicals TEMPON and m-dinitrobenzene (m-DNB ) molecules on the donor and acceptor centers of gamma-Al2O3 has been studied. It is shown that ESR spectra of adsorbed TEMPON radicals at 1 00-300 K could be accounted for by the slow motions of these radicals (tau(corr)=1x10(-7) approximately 1.5x10(-8) s). The adsorption of m-d initrobenzene on donor centers is accompanied by the appearance of rad icals with similar ESR spectra. These particles are also assumed to be stabilized on the surface as nitroxyl radicals. A mechanism for their formation is suggested.