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Abstract: Three novel d10 metal coordination polymers, {[Cd(H2odpa)(phen)2]·H2O} n (1), [Cd2(odpa)(phen)(H2O)2] n (2), {[Zn4(odpa)2(phen)2(H2O)2]·H2O} n (3), (H4odpa=4,4′-oxydiphthalic acid, phen=1,10-phenanthroline) were obtained with different metal/ligand ratios through hydrothermal method and characterized. Compound 1 forms a one dimensional zigzag chain, in which two phen ligands chelate to one cadmium atom. Compound 2 shows a three dimensional network structure comprised of new tetranuclear cadmium clusters as the nodes and (odpa)4− anions as the linkers, exhibits an unusual topological structure. Compound 3 is an unprecedented three dimensional polymer based on octanuclear zinc clusters cross-linked by (odpa)4− anions. In 1–3, central CdII/ZnII ions and (odpa)4− ligand display completely different coordination modes and conformations. In addition, the thermal stabilities and photoluminescence properties of 1–3 were also studied. [Copyright &y& Elsevier]

Abstract: Two novel cadmium(II) coordination polymers [Cd(pyip)(ox)]·H2O (1) and [Cd2(pyip)2(ox)2·(H2O)][Cd(pyip)(ox)]·4(H2O) (2) (pyip=2-(pyridin-3-yl-1H-imidazo [4,5-f][1,10]phenanthroline, H2ox=oxalic acid), have been hydrothermal synthesized and characterized by single crystal X-ray diffraction. Compound 1 is 1D zigzag chain, in which oxalate anion as bridging ligand is responsible for the formation of the main framework and pyip as chelating ligand grafts on two sides of the zigzag chain. Compound 2 contains two kinds of independent polymers [Cd2(pyip)2(ox)2(H2O)] (A) and [Cd(pyip)(ox)] (B) to form an interdigitated 1D+1D structure, in which polymers A and B are paratactically assembled in an ABCD sequence. The fundamental unit of polymer B in 2 is the same as that in 1. For compounds 1–2, weak interactions, primarily hydrogen bonding and π⋯π stacking interactions, have greatly influence on the supramolecular motifs recognized in the crystal packing. Especially, the oxalate anions as bridging ligand simultaneously adopt multiform coordination modes in two compounds. In addition, 1 and 2 displayed a strong fluorescent emission in the solid state at room temperature. [Copyright &y& Elsevier]

Abstract: A novel Ag(I) compound [Ag(H2cpop)(bpy)] n (1) (H3cpop=4-(4-carboxyphenoxy) phthalic acid, bpy=4,4′-bipyridine), has been hydrothermally synthesized and structurally characterized. H3cpop came from the in situ decarboxylation of H4odp (H4odp=4,4′-oxydiphthalic acid) in the hydrothermal reactions. Compound 1 was obtained from the self-assembly of Ag(I) salt with bpy and H4odp ligands to form a 1D chain bearing hooks with carboxyl groups. The two chains are recognized each other to generate molecular zipper structure by hydrogen bonding interaction between the bearing carboxyl groups. Compound 1 is stable in air, and show intense photoluminescence at room temperature. [Copyright &y& Elsevier]