Studies on solid phase synthesis,characterization and fluorescent property of the new rare earth complexes

Abstract

Rare earth-β-diketone ligand complex luminescent material has stable chemical properties and excellent luminous property.Using europium oxide and( γ-NTA) as raw materials,novel rare earth-β-dione complexes are synthesized by solid state coordination chemistry. The synthesis temperature and milling time are discussed for optimization. Experimental results show that the suitable reaction situation is at 50 ℃ and 2. 0 h for solid-phase synthesis. The compositions and structures of the complexes are characterized by means of elemental analysis,UV-Vis and FTIR methods,and the phase stability of the complex is determined by using TG-DTA technique. It is proved that preparation of waterless binary rare earth complexes by the solid phase reaction method results in a higher product yield. The fluorescence spectra show that between Eu( Ⅲ) and γ-NTA,there exists efficient energy transfer,and the rare earth complexes synthesis is an excellent red bright light-emitting material with excellent UV excited luminescence properties.