Phosphorescence Quenching of Benzil by Polystyrene in Dilute and Semidilute Solutions

A number of recent studies have reported on phosphorescence quenching of small excited-state molecules by macromolecules in solution. Horie and Mita have published results concerning energy transfer from a benzil triplet to an anthracene moiety located either at the terminus or the center of a polystyrene chain while other studies have been reported concerning interactions between benzil triplets and anthracene moieties labeled randomly along a polystyrene chain backbone. Another class of studies concerned the interaction of small molecules with polymers which have many reactive sites along their backbones; these studies have included two investigations of phosphorescence quenching of benzil by polystyrene in benzene or other solvents.