FLUORESCENCE AND PHOTOCHEMICAL PROPERTIES OF EU(III) POLY(ACRYLIC ACID-CO-ETHYL METHACRYLATE) COMPLEXES

The fluorescent and photochemical. properties of Eu(III) with copolyme rs of acrylic acid and ethyl methacrylate were investigated. It was fo und. that photochemical behavior of EU(3+) complexes with copolymers i s essentially different from that Eu3+ complexes with poly-acrylic aci d-in the former Eu3+ luminescence intensity during photolysis noticeab ly enhances rather than reduces. Two factors were supposed to cause th e enhancement of Eu(III) luminescence efficiency during photolysis: on e is responsible for decrease in the efficiency of the energy transfer from EU(3+) to -OH vibrational manifold and the other causes an incre ase in asymmetric binding site for EU(3+) ions.