Fluorescent properties of europium(III) complexes with polyacrylic acid containing graftedo-phenanthroline groups

Fluorescent properties of Eu^III complexes with polyacrylic acid containing graftedo-phenanthroline groups were studied. The presence ofo-phenanthroline groups (2%) in the macromolecular ligand provides a 2- to 3-fold increase in the fluorescence intensity as compared to that for Eu^III polyacrylates. The effect of concentration quenching of fluorescence, which is observed as the temperature decreases from 300 to 77 K, is explained by the shortening of the average Eu-Eu distances and by the increase in the efficiency of energy redistribution in the complex. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2253–2255, December, 1997.