2-(3'-羧基苯氧基)苯甲酸和含氮配体构筑的过渡金属配合物的合成、晶体结构及荧光性质  

Synthesis,Crystal Structure and Fluorescent Properties of Transition Metal Complexes Constructed with 2-(3'-Carboxyphenoxy) benzoic Acid and N-Donor Ligands

作　　者：李铮 李睿[1] 李夏[1] LI Zheng;LI Rui;LI Xia(Department of Chemistry,Capital Normal University,Beijing 100048,China)

机构地区：[1]首都师范大学化学系,北京100048

出　　处：《高等学校化学学报》2018年第11期2363-2371,共9页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21471104);首都师范大学实验室开放基金(批准号:LIP15009S48)资助~~

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Cd^(2+)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Cd^(2+)连接成Cd^(2+)-2,3'-oba-Cd^(2+)-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Zn^(2+)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Zn^(2+)并形成二维网层,BTB分子桥联Zn^(2+)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.Taking 2-(3′-carboxyphenoxy)benzoic acid(2,3′-H 2 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 Cd 2+is{CdO 4 N 2},the 2,3′-oba ligand and the DPP ligand link Cd 2+into Cd 2+-2,3′-oba-Cd 2+-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 Zn 2+adopts a five-coordinated distortion quadrilateral cone configuration{ZnO 4 N}.The 2,3′-oba ligand links the adjacent Zn 2+as a bidentate chelate and a bidentate bridge to form a two-dimensional network layer.The BTB molecule bridges the Zn 2+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 theπ*-πtransition 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.

关 键 词：过渡金属配合物 2-(3′-羧基苯氧基)苯甲酸 晶体结构 荧光性质 

分 类 号：O614[理学—无机化学]