Synthesis and photophysical properties of novel polymeric Eu(III) complex with bicoordination ligand

A novel complex of Eu(III) with bicoordination ligand: 4,4'-bis[2-(2'-pyridyl)) benzimidazol-yl]-biphenyl (Bmbp) has been synthesized. The structure of the ligand was characterized by H-1 NMR, FT-IR and UV-vis: Eu(III) complex was characterized by FT-IR, UV-vis, elemental analysis, conductivity measurements and gel-permeation chromatography (GPC). The luminescence properties were investigated by UV-vis and fluorescence spectra. The experimental results show that the complex contain more than one Eu(III) ion, the emission at 614 nm from the D-5(0)-> F-7(2) electronic dipole transition is large enhanced, and the complex is excellent energy transfer from ligand to Eu3+ in the solid state. Thermal property measurement and analysis show that it has a good thermal stability. (C) 2008 Elsevier B.V. All rights reserved.