Solid materials as sources for synthetically useful singlet oxygen

Solid materials can generate O-1(2) ((1)Delta(g)) either by irradiation of an immobilized dye in the presence of oxygen, or by catalytic decomposition of H2O2. The methods for obtaining such solid catalysts are described, and the usefulness of the obtained materials in preparative O-1(2) oxygenations (ene hydroperoxidation, [2 + 2]- and [4 + 2]-cycloaddition) is discussed, particularly with respect to substrate scope, solvent scope, reusability and productivity of the catalyst, regioselectivity and chemoselectivity of the oxidation.