Luminescence properties and intramolecular energy transfer of europium (III) complex in Langmuir-Blodgett film

The fluorescence spectra of europium (III) complex in Langmuir-Blodgett film were obtained when the sample was irradiated by 355 nm UV light corresponding to a ligand pi-->pi* transition at room temperature. A 115 cm(-1) splitting of the D-5(1) energy level of europium (III) ion was observed. A datailed discussion of intramolecular energy transfer of europium (III) complex in Langmuir-Blodgett film was given. On the basis of simulating the lifetime of D-5(0) State of europium (III) ions, it was found that the population of D-5(0) slate comes from two pathways: one is directly from the ligand triplet state (T-1), and the other is from D-5(1) Slate which is also populated from the ligand triplet stare (T-1). The branching ratio for these two pathways is 0.18. The kinetics parameters of intramolecular energy transfer of europium (III) complex in LB film were also derived.Materials Science, MultidisciplinaryMultidisciplinary SciencesSCI(E)4ARTICLE6692-699