Photoformation and structure of oxygen anion radicals (O2-) and nitrogen-containing anion radicals adsorbed on highly dispersed titanium oxide anchored onto porous Vycor glass

摘要: Photoformation of O/sub 2//sup -/ and nitrogen-containing radicals on titanium oxide anchored onto porous Vycor glass has been studied by using ESR isotopically labeled compounds. UV irradiation the catalyst at 77 K in presence N/sub 2/O or 2/ leads to formation an unstable radical (N/sub 2/O/sup 2/O/sub 2/..sqrt..) anion radical, respectively. Hyperfine splittings due /sup 17/O nuclei show that photoformed species are adsorbed Ti/sup 4 +/ ions with slightly nonequivalent oxygen nuclei. The addition disappearance latter -/, indicating electron transfer occurs easily between oxide. 34 references, 10 figures, 1 table.