邻、间、对甲基苯甲酸铽及钇掺杂配合物的合成与荧光性能

合成了6种以邻、间、对甲基苯甲酸(o-,m-,p-MBA)为第1配体,1,10-邻菲口罗啉(phen)为第2配体的铽及钇掺杂铽的三元和四元配合物,通过元素分析和EDTA滴定确定了它们的组成.室温下记录了这6种配合物的荧光光谱,比较了第1配体的改变对配合物荧光强度的影响及非荧光稀土离子Y3+与配合物中的发光离子Tb3+之间的相互作用.结果表明:3种三元配合物和3种四元配合物均具有优良的光致发光性能,各配合物的相应跃迁发射峰位基本上没有变化.3种三元纯铽配合物在489 nm和545 nm处的荧光发射强度均按邻、间、对位的顺序依次增强;3种四元掺杂配合物中掺杂离子Y3+对配合物中Tb(Ⅲ)在489和545 nm两处的强发射均表现为荧光敏化作用.

Synthesis and Studies on Luminescent Properties of Terbium and Terbium Doped Yttrium Complexes with o-, m-, p-methylbenzoie Acid and 1,10-phenanthroline

Three ternary complexes of Tb(Ⅲ) and three quaternary complexes of Tb(Ⅲ) doped with Y(Ⅲ) were synthesized with o-,m-,p-methylbenzoic acid(o-MBA,m-MBA,p-MBA) as the first ligand and 1,10-phenanthroline(phen) as the second ligand.The compositions of these complexes were confirmed by elemental analysis(C,H,N) and EDTA titration for rare earth.Excitation and luminescence spectra of the title solid complexes were carried out and recorded by using a Hitachi F-4500 fluorescence spectrophotometer at room temperature.The effects of different positional replacing benzoic acid as the first ligand on the fluorescence properties of the complexes of terbium were discussed and the interaction between doped Y(Ⅲ) and couter ion Tb(Ⅲ) in quaternary complexes were studied.The results indicated the six complexes were all excellent photoluminescent and the emission positions of these complexes were not basically various.Three ternary Tb(Ⅲ) com-plexes which consecution of the stronger emission 5D4→7F6(489 nm)and 5D4→7F5(545 nm) was: Tb(o-MBA)3phen