关键词: 材料 , 非晶光学材料 ,  , 溶胶沉淀法 , 氧化铕溶胶 , 荧光 , 配位修饰

Abstract: Methanol colloids of the coordinated europium oxide were prepared by colloids precipitation method with ligands of thienyltrifluroacetone (TTA) and 1,10phenanthroline (phen). The effect of concentration of NaOH on fluorescent properties and structure of nanoparticles of the coordinated europium oxide were characterized by fluorescent spectra, UV spectra (UVVis) and high resolution transmission electron microscopy (HRTEM). The results show that the nano europium oxide particles coordinated by TTA and phen can irradiate intense red light under ultraviolet radiation, and their fluorescence spectra presents typical characteristic emission peaks of Eu³⁺ ions. Different NaOH concentration has a great effect on the fluorescence intensity of nano europium oxide methanol colloids. The HRTEM and selected area electron diffraction (SED) results show that the core of the nanoparticles are europium oxide microcrystals with the size less than 10 nm. As this kind of the coordinated europium oxide colloid can emitted strong red fluorescence, it can be used as excellent luminescent materials in the future.

Key words: Materials,    , Noncrystalline optical materials,    , Colloids precipitation,    ,  Colloids of europium oxide,    ,  Fluorescence, Modifiers