FLUORESCENT AND PHOTOCHEMICAL PROPERTIES OF TB-III COMPLEXES WITH ACRYLIC ACID-BASED MACROMOLECULAR LIGANDS

The fluorescent and photochemical properties of Tb-III complexes with macromolecular ligands based on acrylic acid were studied. The photoch emical behavior of the macromolecular Tb-III complexes with acrylic ac id-alkyl methacrylate copolymers differs considerably from those of Tb -III complexes with polyacrylic acid and of low-molecular-weight analo gs; in the former case, the intensity of Tb3+ photoluminescence notice ably increases during photolysis rather than decreases. It was found t hat the increase in the length of the alkyl group in the alkyl methacr ylate favors the enhancement of the luminescence during the photolysis . The higher efficiency of the enhancement of the Eu3+ fluorescence du ring the photolysis of similar complexes of Eu3+ compared to the compl exers of Tb3+ is due to the nature of the electrodipole ''hypersensiti ve'' D-5(0)-F-7(2) transition in Eu3+.