稀土(Y、Pr、Tb)希夫碱配合物的合成、结构及荧光性质

Synthesis,Crystal Structure and Luminescent Properties of Y,Pr and Tb-Schiff Base Complexes

以水杨醛苯甲酰腙为配体(H2L),采用溶剂热法,合成了3种稀土[Y、Pr、Tb]配合物。通过红外光谱、热重分析、元素分析、紫外及荧光光谱对其进行了表征,并用X单晶衍射测定了钇配合物的结构。其结构以4个对称的金属核为骨架,每个金属核上带有2个配体,属于四方晶系,P4/ncc空间群,a=2.1656(2)nm,b=2.1656(2)nm,c=2.6668(4)nm,α=90°,β=90°,γ=90°,V=12.507(3)nm3,Z=16。荧光光谱表明,钇配合物在473nm处有强的荧光发射,铽、镨配合物都表现出良好的特征荧光发射,其光致发光性能良好,有望在光学材料方面得到应用。

Three rare earth [yttrium,praseodymium,terbium]complexes with the Schiff base ligands H2L（salicylaldehyde benzoyl hydrazone）were synthesized by solvothermal method and characterized by IR,TGA,elemental analysis,UV-Vis and PL.Using single-crystal X-ray diffraction,the crystal structure of yttrium complex was determined to have four symmetrical metal centers as skeletons.Each metal center was coordinated with two ligands.The complexes crystallized in tetragonal system,P4/ncc space group,a=2.1656（2）nm,b=2.1656（2）nm,c=2.6668（4）nm,α=90°,β=90°,γ=90°,V=12.507（3）nm3,Z=16.Fluorescence spectroscopy showed that yttrium complex exhibited a strong fluorescence emission of 473 nm,while Tb,Pr complexes exhibited good characteristic transitions.The complexes have excellent photoluminescence and might be useful in optical materials.