A series of coordination complexes based on unsymmetrical multicarboxylate ligands: syntheses, structures and properties
作者:Dong-Hua Hu、Chun-Yi Sun、Fu-Hong Liu、Chao Qin、Xin-Long Wang、Zhong-Min Su
DOI:10.1039/c3ce40782a
日期:——
Six new coordination polymers, namely, [Zn2(L1)2phen2(H2O)2] (1), [M3(L1)2(OH)2 (4,4′-bpy)(H2O)2]·2H2O (M = Cd (2), Co(3)), [Cd5(L1)2(OH)2(trz)4(L3)]·2H2O (4), [Zn(HL2)(4,4′-bpy)] (5) and [Cd3(L2)2(L3)2(H2O)5]·H2O (6) (H2L1 = 4-(1-carboxy-ethoxy)-benzoic acid, H3L2 = 5-(1-carboxy-ethoxy)-isophthalic acid, L3 = 1,2-bis(1,2,4-triazole-1-yl)ethane, phen = 1,10-phenanthroline, 4,4′-bpy = 4,4′-bipyridine, Htrz = 1,2,4-triazole), have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction. Compound 1 is a molecular square composed by two Zn ions, two L1 and two phen ligands. Compounds 2 and 3 are isostructural and display 3D frameworks constructed by 1D M–O–M chains. Compound 4 exhibits a 3D 8-connected network with hex topology based on the pentanuclear Cd cluster and the point symbol is (36·418·53·6). Compound 5 shows a 2D wavelike layer with sql topology. Compound 6 reveals a 3D three-fold interpenetrating architecture having (3,4)-connected dmd topology with the point symbol of (4·102)2(42·104). These compounds have been characterized by infrared spectroscopy (IR) and thermal gravimetric analyses (TGA). In addition, the photoluminescent behaviour of 1, 2, and 4–6 has been investigated in detail.
六种新型配位聚合物,即[Zn2(L1)2phen2(H2O)2] (1)、[M3(L1)2(OH)2 (4,4′-bpy)(H2O)2]-2H2O (M = Cd (2)、Co (3))、[Cd5(L1)2(OH)2(trz)4(L3)]-2H2O(4)、[Zn(HL2)(4,4′-bpy)](5)和[Cd3(L2)2(L3)2(H2O)5]-H2O(6)(H2L1 = 4-(1-羧基-乙氧基)-苯甲酸、H3L2=5-(1-羧基-乙氧基)-间苯二甲酸,L3=1,2-双(1,2,4-三唑-1-基)乙烷,phen=1,10-菲罗啉,4,4′-bpy=4,4′-联吡啶,Htrz=1,2,4-三唑)的水热合成和单晶 X 射线衍射表征。化合物 1 是由两个锌离子、两个 L1 和两个 phen 配体组成的分子方块。化合物 2 和 3 结构相同,显示出由一维 M-O-M 链构建的三维框架。化合物 4 以五核镉簇为基础,呈现出具有六边形拓扑结构的三维 8 连接网络,点符号为 (36-418-53-6)。化合物 5 显示了具有 sql 拓扑结构的二维波状层。化合物 6 显示了具有 (3,4)-connected dmd 拓扑结构的三维三层互穿结构,点符号为 (4-102)2(42-104)。这些化合物通过红外光谱(IR)和热重分析(TGA)进行了表征。此外,还详细研究了 1、2 和 4-6 的光致发光行为。