Luminescence of europium(III) β-diketonate complexes in a Nafion membrane

EuL3 DT phen complex compounds (L is benzoylacetone, dibenzoylmethane, or thenoyltrifluoroacetone; phen is 1,10-phenanthroline) were synthesized in a perfluorosulfonic membrane. The results of adsorption measurements suggest that the complexes experience steric hindrances in the membrane pores. The luminescence from intercalates is sensitized due to the increase in the degree of population of the D 0 excited state of europium(III) caused by the transfer of energy from the ligands. Depending on the type of beta -diketonate ligand, the adsorption of water on the modified membrane can enhance or suppress the luminescence from the complex.