【摘要】 选用2-（3’-羧基苯氧基）苯甲酸（2,3’-H2oba）、1,3-双（4-吡啶基）-丙烷（DPP）和1,4-二（1,2,4-三氮唑-1-）丁烷（BTB）为配体,采用水热法得到了过渡金属配合物Cd （2,3’-oba）（DPP）（1）和Zn（2,3’-oba）（BTB）0. 5（2）.配合物1为二维网状结构,中心Cd²⁺的配位环境为{Cd O4N2},双齿螯合配位的2,3’-oba和单齿桥联配位的DPP将Cd²⁺连接成Cd²⁺-2,3’-oba-Cd²⁺-DPP两条螺旋链.配合物1由分子间氢键连接并自组装为三维超分子结构.配合物2为三维框架结构,中心Zn²⁺采取五配位的畸变四方锥构型{Zn O4N}. 2,3’-oba配体以双齿螯合与双齿桥联的配位方式连接相邻Zn²⁺并形成二维网层,BTB分子桥联Zn²⁺并连接相邻网层进而形成三维结构.荧光光谱表明配合物1和2分别在437和359 nm存在最大发射,均来源于配体的π*-π跃迁.广谱型农药甲基磺草酮对配合物2的荧光强度具有明显的猝灭作用,据此配合物2可作为荧光探针检测甲基磺草酮.更多还原

【Abstract】 Taking 2-（3’-carboxyphenoxy） benzoic acid（2,3’-H2 oba）,1,3-bis（4-pyridyl）-propane（DPP）and 1,4-bis（1,2,4-triazole-1-） butane（BTB） as ligands,two transition metal complexes Cd（2,3’-oba）（DPP）（1） and Zn（2,3’-oba）（BTB）0. 5（2） were obtained by hydrothermal method. Complex 1 is a two-dimensional network structure,the coordination environment of the central Cd²⁺is { CdO4 N2},the 2,3’-oba ligand and the DPP ligand link Cd²⁺into Cd²⁺-2,3’-oba-Cd²⁺-DPP helical chains by bidentate chelating and monodentate bridging modes,respectively. Complex 1 is linked by intermolecular hydrogen bonding and self-assembled into a three-dimensional supramolecular structure. Complex 2 is a three-dimensional framework structure,and the central Zn²⁺adopts a five-coordinated distortion quadrilateral cone configuration { ZnO4 N}. The2,3’-oba ligand links the adjacent Zn²⁺as a bidentate chelate and a bidentate bridge to form a two-dimensional network layer. The BTB molecule bridges the Zn²⁺and connects adjacent network layers to form a three-dimensional structure. Fluorescence spectroscopy indicates that complexes 1 and 2 have maximum emission at 437 nm and 359 nm,respectively,both are derived from the π*-π transition of the ligand. The broad-spectrum pesticide mesotrione has a significant quenching effect on the fluorescence intensity of complex 2,thus complex 2 can be used as a chemical sensor for detecting mesotrione.更多还原