SiO_2/稀土Eu(Ⅲ)配合物核-壳复合粒子的制备及发光性能研究  

Preparation and Spectroscopic Properties of Ternary Complex of Europium and Coated SiO_2 Core-shell Nano-particles

作　　者：黄震[1] 唐建国[1] 王蕊[1] 王瑶[1] 刘继宪[1] 

机构地区：[1]青岛大学化学化工与环境学院,青岛266071

出　　处：《材料导报》2011年第6期16-19,共4页Materials Reports

基　　金：国家973专项(2004CCA02400);山东省自然科学基金(Y2008B06);山东省科技攻关项目(2010GGX10327);青岛市国际科技合作项目(10-1-4-97-hz)

摘　　要：采用Stober法制备了粒径为40-60nm的单分散纳米SiO2微球，以氧化铕为原料、α-噻吩甲酰三氟丙酮和邻菲哆啉为配体制备了稀土铕的三元配合物，并将其成功包覆在SiO2微球表面，形成核-壳复合粒子。采用红外光谱和元素分析表征配合物的结构。透射电镜照片表明，稀土有机配合物在SiO2微球表面形成了致密的纳米级包覆层，包覆层厚度随配合物用量的增加而增加。复合粒子呈现出很强的Eu配合物发光，纳米SiO2核对配合物有荧光增强作用，但配合物浓度较高时荧光增强效应有所减弱。Mono-dispersed SiO2 of 40-60nm were synthesized by traditional Stoeber method. Europium complex with 2-Thenoyhrifluoroacetone（TTA） and 1, 10-phenanthroline（Phen） was prepared, and coated onto mono-dispersed nano-SiO2. The structure of the Eu-complex was analyzed with infrared spectroscopy and elemental analysis. Transmission electron microscopy（TEM） were used to observe the state of the nano particles. The results indicate that the Eu-complex continuously coated on the nanosized silica and the thickness of the coating layer can be altered by the variation of the amount of Eu-eomplex. The fluorescence measurements indicate that the fluorescence of Eu （TTA）3 Phen H2O is enhanced by nano-SiO2, and higher Eu-complex content results in lower enhancement.

关 键 词：二氧化硅 单分散 核-壳结构 表面包覆 稀土 稀土配合物 

分 类 号：O614.31[理学—无机化学] TB3[理学—化学]