Synthesis and luminescent properties of ternary complexes EuXLa1?X(TTA)3Dipy

Rare-earth ternary complexes Eu_XLa_1?X(TTA)₃Dipy (X = 0, 0.1, 0.25, 0.5, 0.75, 0.9, 1.0) were synthesized. Characterization with DTA-TG, IR, elemental analysis and fluorescent spectra had also been carried out. It is found that the enhanced luminescence of Eu³⁺ ions by La³⁺ ions occurs in ternary complexes, and when X = 0.25, Eu_0.25La_0.75(TTA)₃Dipy has the highest luminescence efficiency and lifetime. It is proved by TG curve that the complexes are stable, and we monitored the spectra of Eu_XLa_1?X(TTA)₃DipyPVK:Eu_XLa_1?X(TTA)₃Dipy/BCP/AlQ/Al] at the different rate r min^?1. The results showed that the La³⁺ ion acts as an energy transfer bridge that helps energy transfer from PVK to Eu³⁺.