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本文以弯曲型二酸2,2′-azanediyldibenzoicacid(H2L)为配体,溶液法合成了2个新的配合物[Zn2(L)2(H2O)2]·H2O(1)和[(NH4)2Cd(L)2]·C2H5OH(2)。通过X射线单晶衍射分别测定了他们的结构:配合物1属于单斜晶系,空间群为P21/c,a=1.4879(2)nm,b=0.8989(1)nm,c=1.2100(2)nm,β=99.211(2)°,V=1.5973(3)nm3。配体L的羧酸根均为单齿配位,桥连2个锌离子,形成一个零维的[2+2]扭曲环状结构,并由氢键作用连接成二维结构。配合物2属于正交晶系,空间群为Pbcn,a=2.0602(2)nm,b=1.2819(1)nm,c=2.2461(1)nm,V=5.9319(6)nm3。Cd!取较少见的羧酸根螯合八配位结构,L与Cd!也形成了二核环状结构,并通过共用1个镉离子而形成一维的阴离子链,抗衡阳离子为NH4+。链间通过π…π作用堆积成三维结构。此外,还并测定了配体及配合物的荧光性质。
In this paper, two novel complexes [Zn2 (L) 2 (H2O) 2] · H2O (1) and [(NH4) 2) were synthesized by the solution method using 2,2’- azanediyldibenzoicacid (H2L) 2Cd (L) 2] · C2H5OH (2). Their structures were determined by X-ray single crystal diffraction. Complex 1 belongs to the monoclinic system with space group P21 / c, a = 1.4879 (2) nm, b = 0.8989 ) nm, β = 99.211 (2) °, V = 1.5973 (3) nm3. The carboxylates of ligand L are monodentate ligands, bridging two zinc ions to form a zero-dimensional [2 + 2] twisted ring structure, which is connected to a two-dimensional structure by hydrogen bonding. The complex 2 belongs to the orthorhombic system. The space group is Pbcn, a = 2.0602 (2) nm, b = 1.2819 (1) nm, c = 2.2461 (1) nm and V = 5.9319 (6) nm3. Cd + takes the less common carboxylate eight-coordinated structure, L and Cd! Also form a dinuclear ring structure, and by sharing a cadmium ion to form a one-dimensional anion chain, the counter cation is NH4 +. The chains are stacked into three-dimensional structure through π ... π interaction. In addition, the fluorescence properties of ligands and complexes were determined.