具有开放骨架双核锌羧酸配合物的设计合成与结构表征

Construction and Characterization of an Open-Framework Binuclear Zinc Carboxylate

选择含氮的有机羧酸配体1,3-di(3’,5’-dicarboxylphenyl)pyridine(C_(21)H_(13)NO_8,H_4L),与过渡金属锌在DMA/CH_3CN/H_2O的混合溶剂热体系中配位组装,合成了一例具有3D开放骨架结构的双核锌金属羧酸配位化合物———Zn_2(C_(21)H_9NO_8)(H_2O)(配合物1).用单晶X-射线衍射分析确定了其晶体学结构,配合物1结晶在正交晶系,P2_12_12_1空间群(No.19);有机羧酸衍生物配体H_4L结构中的羧酸氧原子与金属锌螯合配位形成1个双核锌的次级结构单元,再通过有机配体的配位作用连接形成配合物1的三维开放骨架结构,沿y轴方向具有空旷的孔道结构.

The construction,crystal structure and properties of multinuclear metal carboxylate frameworks and their potential applications have attracted considerable attention worldwide.In this study,a novel open-framework binuclear zinc carboxylate,Zn2（C21H9NO8）（H2O）（compound 1）,was constructed from1,3-di（3’,5’-dicarboxylphenyl）pyridine（H4L）with the transition metal zinc under DMA/CH3CN/H2O mixed solvothermal conditions.Single-crystal X-ray diffraction analysis revealed that compound 1crystallized in the orthorhombic space group P212121（No.19）.The oxygen atoms in carboxylate chelated with Zn to form a secondary building unit（SBU）featuring binuclear zinc,and these SBUs were constructed by H4L further into the open-frameworks of compound 1featuring extra-large channels along y axis.