Functionalities and architectures of coordination polymers with multi-dimensionalities via transition metal-dicarboxylate ligands

Five coordination polymers, namely, Zn(dpd)(bpy)(0.5) (1), Zn(Hdpd)(2)(bpy)(2)center dot H2O (2), Co-3(Hdpd)(2)(dpd)(2)(bpy)(3)(H2O)(2)center dot 2H(2)O (3), Co(Hdpd)(2)(bpy)(H2O)(2)center dot 2H(2)O (4) and Ni(Hdpd)(2)(bpy)(H2O)(2)center dot 2H(2)O (5) (H(2)dpd = 2,4-diphenyl ether dicarboxylic acid, bpy = 4,4'-bipyridine) with zero-(0D), one-(1D), two-(2D) and three-dimensional (3D) structures have been synthesized under similar hydrothermal conditions using H(2)dpd, bpy and different transition metal salts. Compound 1 possesses a 3D framework with a {4.8(2)}{4.8(2).10(3)} topology. Compound 2 is a mononuclear structure which is further self-assembled through both hydrogen bonding and pi center dot center dot center dot pi stacking interactions to generate a 3D supramolecular structure. Compound 3 is made up of a 2D ladder network with {4.6(2)}(2){4(2).6(2).8(2)} topology, which consists of 1D ladder-like chains. Compounds 4 and 5 are isostructural and feature 1D chains which are further connected by hydrogen bonding interactions to form 2D supramolecular structures. These compounds have been characterized using elemental analysis, infrared (IR), thermal gravimetric analysis (TGA), and single crystal X-ray diffraction. Furthermore, the fluorescence properties of 1-5 have been investigated. Water vapor sorption studies reveal that compounds 3, 4 and 5 exhibit very good water vapor uptakes (100.71 ml g(-1) for 3, 109.94 ml g(-1) for 4 and 108.96 ml g(-1) for 5). Magnetic susceptibility measurements indicate that compounds 3 and 4 show antiferromagnetic interactions, while compound 5 shows ferromagnetic behavior.