摘要
合成了系列铕铽双核稀土有机稀土配合物Tb1-xEux(TTA)3Phen,通过差热-热重分析、XRD、红外光谱、紫外光谱和荧光光谱等测试手段研究了配合物的组成、结构和发光性质。由紫外可见光谱可以看出,稀土有机配合物的吸收峰主要来自有机配体HTTA和1,10-Phen;差热-热重分析证明,稀土有机配合物热稳定性较好。荧光光谱和电致发光表明,铽对铕配合物的发光有协同作用。在该系列配合物中,不仅有机配体可以将吸收的能量传递给发光的铕离子使其发光,而且铽离子也可将其吸收的能量通过分子内能量传递给铕离子,增强铕的发光强度。同时就双核稀土有机配合物光致发光和电致发光的特性及掺杂体系的能量传递过程进行了讨论。
The rare earth complexes of Eu^3＋ with HTTA and 1, 10-Phen doped with Tb^3＋ were synthesized. The fluorescence properties of the compounds were studied by TGA-DTA, XRD, IR spectra, UV spectra and fluorescence spectra. The results show that the fluorescence of Eu^3＋ complex is enhanced greatly after doping with Tb^3＋ . UV absorption spectra show that the absorption energy of complexes mostly comes from ligands （HTTA and 1, 10-Phen）. It is proved by TG curve that the complex is stable from ambient temperature to 240 ℃ in the air. The influence of doping content on the fluorescence was investigated. These facts show that not only the ligands but also the Tb^3＋ ion can transfer the absorbed energy to Eu^3＋ ion in the complexes. Luminescent properties of Tb0.5Eu0.5 （ TTA ）2Phen and Tb0.25 Eu0.75 （ TTA ）3Phen are the best. The possible energy transfer process of the EL device was preliminarily discussed.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2006年第6期649-655,共7页
Journal of the Chinese Society of Rare Earths
基金
教育部高等学校博士生创新基金(20050010014)
