Excimer formation of dibenzoylmethanatoboron difluoride during photolysis in polymer films

Photochemical behavior of polyethylene, polystyrene and polymethylmethacrylate films containing dibenzoylmethanatoboron difluoride was investigated. It was observed that during UV irradiation of polyethylene films the monomer fluorescence of the complex (lambda(max) = 450 nm) transforms into excimer fluorescence (lambda(max) = 535 nm).