Electronic properties of calcined materials from a scandium-O-phenylene-O-yttrium-O-phenylene hybrid copolymer

Calcination of a scandium-O-phenylene-Oyttrium- O-phenylene hybrid copolymer under an argon atmosphere at 400–800 C was performed. The calcined materials were found to be composed of nanosized Sc2O3 and Y2O3 particles in the matrix of carbon clusters. ESR spectral examinations of the calcined materials suggest that a two-step electron transfer of Y2O3 fi carbon clusters fi Sc2O3 fi carbon clusters took place to provide a photo-responsive oxidation– reduction function with an oxidation site at Y2O3 particles and a reduction site at carbon clusters