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Recently much attention has been paid to design and synthesis of metal-organic hybrid materials with fascinating network topologies and potential applications as functional materials. The most commonly used strategy for designing such materials relies on the utilization of multidentate Nor O-donor ligands which have the capacity to bridge between metal centers to form polymeric structures. Hydrogen bonding and π-π stacking have also been demonstrated to exert additional control over the coordination geometry of metal ions and over the generation of supramolecular polymers. Terephthalate (tp), with versatile modes of coordination, is a suitable ligand for the design and construction of metal-organic coordination polymers which exhibit various topological structures. 4,4'-Bipyridine (4,4'-bpy) is also an excellent ligand and a number of one-, twoand three-dimensional infinite metal4,4'-bpy frameworks have been generated. Although many interesting examples including the ligand combination of terephthalate and 4,4'-bipyridine have been reported, the development of synthetic routes to systems containing two or more different bridging ligands is much less well explored, and it is generally not yet possible to predict either the composition or structure of the product, much work is required for the rational design and synthesis. In this context, we have been pursuing synthetic strategies for the preparation of non-interpenetrating open frameworks with variable cavities or channels, in which rod-like rigid spacers such as 4,4'-bpy and related species are chosen as building blocks. During studies aimed at constructing cavity containing rectangular two-dimensional networks using dicarboxylate ions, we have isolated two kinds of one-dimensional coordination polymers ‒ [Zn(terephthalate)(pyridine)(H2O)]n (1) and [Zn(oxalate)(pyridine)(H2O)]n (2) ‒ based upon terephthalate/ oxalate anion. We report here the synthesis and crystal structure of the one-dimensional polymeric compound 1, in which hydrogen-bonding and C-H(tp)...π-ring(py) interactions link the polymeric chains into a two-dimensional supramolecular network.

Synthesis and 1D Chain Crystal Structure of Zinc(II) Terephthalate Complex: [Zn(tp)(py)(H2O)]n

Synthesis and 1D Chain Crystal Structure of Zinc(II) Terephthalate Complex: [Zn(tp)(py)(H₂O)]_n