Study on the structure and luminescent properties of the coordinated Eu2O3 ethanol colloids

This work reports the synthesis of the coordinated Eu2O3 ethanol colloids by focused pulsed laser ablation at the interface of solid Eu2O3 target and a flowing liquid containing thenoyltrifluoroacetone (TTA) and 1,10-phenanthroline (Phen). The high resolution transmission electron microscopy, X-ray diffraction and infrared spectroscopy results show the coordinated Eu2O3 nanoparticles have the structure of an inner core of crystal Eu2O3 and an outer layer of ligands, TTA and Phen, coordinated to the surface europium ions of the Eu2O3 nanoparticles. Thermal stability analysis shows the mass of ligands in coordinated Eu2O3 clusters is 14.36%. The coordinated Eu2O3 ethanol colloids can irradiate intense red light under ultraviolet radiation, and their fluorescence spectrum presents typical characteristic emission peaks of Eu3+ ions.