Identification of matrix-isolated methoxyl radicals by recording EPR spectra under photolysis

For the first time gas phase radicals have been observed, using the matrix isolation method, during methanol oxidation on a Pt/SiO₂ catalyst. A method of identifying the radicals generated is suggested, which utilises the differing resistance of MeO^· and MeO^·₂ radicals to photolysis using the full light of a high pressure mercury lamp.