Enhanced Luminescence of Terbium Complexes with 2,3-Pyrazinedicarboxylate by Y(III) Doping

Abstract

Ten kinds of terbium doped inert yttrium complexes with 2,3-pyrazinedicarboxylate (2,3-pzdc2-) have been synthesized. Characterization results indicate that the complexes have the compositions of Tb (pzdc)1.55H2O and TbxYy(pzdc)1.55H2O (x:y=0.10:0.90; 0.20:0.80; 0.30:0.70; 0.40:0.60; 0.60:0.40; 0.70:0.30; 0.80:0.20; 0.90:0.10). IR spectra show that the lanthanide ions coordinate with the carboxylic oxygen atoms and nitrogen atoms of the ligands. Luminescence spectra show that the Y(III) ions can remarkably increase the luminescent intensities of terbium complexes. And Tb0.7Y0.3(pzdc)1.55H2O exhibits the strongest luminescent emission. Furthermore, the doped lanthanide complexes show longer luminescence lifetimes and higher quantum yields. The enhanced luminescence efficiencies of Tb3+ions in the doped complexes may result from intramolecular energy transfer as well as the decrease of the self-quench of the Tb3+ions induced by the doped Y(III) ions.

Synthesis and Characterization of PBA-P(MMA-HPMA) Core-Shell Latex Particles

“…The PBA-P(MMA-ITA) core-shell elastic particles were used to toughen and modify PA 6, the compatilizer was not added at the process of blending modification, because core shell elastic particles had the function of compatibilization by itself [4] . The PBA-P(MMA-ITA-DGEBA) core-shell latex particles with epoxy groups in shell were used to toughen and modify epoxy resin, the SEM was used to observe impact cross section of specimens, the experiment showed that core-shell latex particles had the obvious toughening effect for epoxy resin and good compatibility with epoxy resin at the same time [5,6] . With the deepening of the research, there are many reports about preparation, performance and application of core-shell latex particles, but the research of core-shell latex particles modified polyurethane elastomer was rare.…”