以4-甲基-1,2,3-噻二唑-5-甲酸(C4H4N2O2S,HL)分别与硫酸钴(CoSO4·7H2O)、氯化铜(CuCl2·2H2O)、硝酸银(AgNO3)反应合成了3个配合物[Co(L)2(H2O)4]·2H2O(1)、[CuNa(L)3]n(2)和[AgL]n(3),用元素分析、红外光谱、热重分析进行表征,用单晶X射线衍射测定了产物的结构.配合物1属于三斜晶系,空间群(P1),Co2+的配位数为6,形成一个略为拉长的CoN2O4八面体,与理想的正八面体非常接近.配合物2属于三斜晶系,空间群(P1).Cu2+离子的配位数为4,构成变形的平面四边形结构,Na+离子的配位数为6,构成一个略微变形的八面体结构,最终形成三维网状结构.配合物3属于单斜晶系,空间群P21/c,银离子为三配位,构成变形的平面三角形构型,具有二维网状结构.用溴化乙锭荧光探针法测定了配体和配合物与DNA作用的荧光光谱.%Three transition metal complexes [Co(L)2(H2O)4]· 2H2O (1),[CuNa(L)3]n (2) and [AgL]n (3) were synthesized from 4-methyl-1,2,3-thiadiazol-5-carboxylic acid (C4H4N2O2S,HL),CoSO4·7H2O,CuCl2·2H2O,and AgNO3.They were characterized by elemental analysis,infrared spectrum,thermogravimetricanalysis (TGA).The crystal structures of the complexes were confirmed by single X-ray diffraction method.Complex 1 crystallizes in triclinic system with space group P1,Co2+ ion is six-coordinated to constitute a slightly deformation octahedral structure.Complex 2 crystallizes in triclinic system with space group (P1).Cu2+ ion is four-coordinated to form a quadrilateral plane structure deformation,and Na+ ion is six-coordinated to constitute a slightly deformation octahedral structure,eventually forming a three-dimensional network structure.Complex 3 crystallizes in monoclinic system with space group P21/c,and its coordination number is three,forming a deformation plane triangle configuration with 2D network structure.In addition,DNA-binding of the ligand and complexes was studied by EtBr fluorescent probe method.
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