The activity of a vanadium-containing oligosilsesquioxane towards the
photo-assisted catalytic oxidation of benzene and cyclohexane was inve
stigated for the first time in order to examine its ability as an orga
nic solvent-soluble analogue of silica-supported oxide catalysts. An o
ligosilsesquioxane, Ib, showed excellent activity toward the selective
photooxidation of cyclohexane into cyclohexanone and cyclohexanol (TO
N similar to 20, at 305 K, 6 h).