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制备了Schiff碱型三足体配体H3Brapi,通过溶剂热方法合成了Ce(Ⅲ)的双核配合物[Ce(Brapi)]2·2DMF,利用元素分析、红外光谱、紫外光谱和荧光光谱等进行了表征,并用X-射线单晶衍射测定了其晶体结构,结果表明,配合物晶体属单斜晶系,P21/n空间群,a=1.1667(3)nm,b=1.34829(3)nm,c=2.0869(5)nm,β=96.314°,Z=2,V=3.2630(14)nm3,Dc=1.849Mg·m-3,R1=0.0359,wR2=0.1036。2个配体桥联2个金属形成一种具有反演对称性的夹心式双核结构,其中每个Ce(Ⅲ)的配位环境N4O4都是一种四方反棱柱多面体,Ce-Ce距离为0.3971nm。在2～300K范围内测定了配合物的变温磁化率,结果表明,在配合物中Ce髥离子间存在反铁磁性相互作用。荧光光谱分析表明,配合物的荧光属于L*-L跃迁的发光类型。
The Schiff base type tripodal ligand, H3Brapi, was synthesized and the binuclear complex [Ce (Brapi)] 2 · 2 DMF of Ce (Ⅲ) was synthesized by solvothermal method. Elemental analysis, IR, UV and fluorescence spectroscopy The crystal structure of the complex was determined by X-ray single crystal diffraction. The results show that the complex crystal belongs to monoclinic space group a = 1.1667 (3) nm and b = 1.34829 (3) nm, = 2.0869 (5) nm, β = 96.314 °, Z = 2, V = 3.2630 (14) nm3, Dc = 1.849 Mg · m -3, R1 = 0.0359, wR2 = The metal forms a sandwich dual-core structure with inversion symmetry, in which the coordination environment N4O4 of each Ce (Ⅲ) is a tetragonal anti-prismatic polyhedron with a Ce-Ce distance of 0.3971 nm. The temperature-dependent magnetic susceptibility of the complex was measured in the range of 2 ~ 300K. The results showed that there was an antiferromagnetic interaction between Ce 髥 ions in the complex. Fluorescence spectrum analysis showed that the fluorescence of the complex belongs to the luminescence type of L * -L transition.