Study On Preparation And Fluorescence Characteristic Of Coordinated Eu_2o_3/polymer Hybrid Films

摘要

The cyclohexane solution of TTA (trifluorothenoyl-acetone), phen (8-hydroxylquinoline) and PS (polystyrene), the ethyl acetate solution of TTA, phen and PMMA (polymethyl methacrylate) were used as flowing liquid, the coordinated Eu_2O_3/porymer hybrid colloids were successively produced by focused pulsed laser ablation of Eu_2O_3 target in interface of solid and flowing liquid. As solvent in the hybrid colloids has volatilized, the coordinated Eu_2O_3/polymer hybrid films were obtained. The hybrid colloids and films were characterized by TEM, UV-vis spectrum, fluorescence spectrum, TG-FTIR and X-ray photoelectron spectrum. The results show the coordinated Eu_2O_3 nanoparticles with average size of less than 20 nm are surrounded by the three-dimensional network and are properly incorporated into the PMMA and PS matrix, the hybrid films can emit intense red light under ultraviolet radiation, and their emission fluorescence spectra display same characteristic emission peaks of Eu~(3+) ions. The Eu_2O_3 hybrid films have better fhermo stability than the related pure polymers because of strong interaction between surface europium ions of the nanoparticles and polymer. Because the coordinated Eu_2O_3 nanoparticles were wrapped by polymer, they have higher chemical stability than the related europium complex.