Study on preparation and fluorescence characteristic of coordinated Eu 2O 3/polymer hybrid films

Abstract

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/polymer 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 thermo 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.