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Presented here are two d metal-organic coordination polymers (CPs), [Zn(CO)( μ-OH)] ( 1) and [Cd(CO)(OX)(HO)] ( 2) (HOX = oxalic acid) constructed from squaric acid (HCO) tectons. Single-crystal X-ray diffraction studies indicated that both 1 and 2 show 3D structures. The two 3D CPs are assembled from 1D {[Zn( μ-OH)]} chains to 3D structure linked through CO ligands for 1 and 2D {[(Cd1)(CO)]} layers pillared by OX ligands for 2. The structure of compound 1 can be described as a trinodal (3,6,6)-connected net with the point symbol of {4}{4·6·8}{4·6}, whereas 2 possess a trinodal (4,5,6)-connected {4·8} {4·6·8} {4·6} topology. Furthermore, the fluorescent and thermal stabilities properties of these two compounds were investigated. [ABSTRACT FROM AUTHOR]

A new two-dimensional polymeric [Zn(4-pzpt)(btc)(HO)·3HO] ( 1) (4-Hpzpt = 3-(pyridin-4-yl)-5-(pyrazin-2-yl)-1H-1,2,4-triazole, Hbtc = 1,2,3-benzenetricarboxylate), has been synthesized and structurally characterized and features a 3D supramolecular framework with 1D hydrophilic channels formed by the interlayer hydrogen bonds. An unprecedented aqua ligand assisted octameric water cluster consisting of a quasiplanar cyclic hexameric core and two dangling water molecules is captured in 1. The thermal stability and solid state fluorescent property of 1 are discussed. [ABSTRACT FROM AUTHOR]

Two coordination polymers, namely, [Ni(L)(CHN)(HO)] ( 1), and [Mn(L)(HO)] ( 2) have been hydro(solvo)thermally synthesized through the reaction of 4-(4-hydroxypyridinium-1-yl)phthalic acid (HL) with divalent nickel and manganese salts. As a result of various coordination modes of the versatile 4-(4-hydroxypyridinium-1-yl)phthalic acid, these compounds exhibit structural diversity. Complex 1 exhibits a 3D coordination framework through the rich hydrogen bond. Complex 2 exhibits a 3D coordination network based on layers. These complexes have been characterized by powder X-ray diffractions (PXRD), IR spectroscopy, elemental analysis, thermogravimetry, single-crystal X-ray crystallography and solid UV spectroscopy. [ABSTRACT FROM AUTHOR]

A new metal-organic framework {[Cd(L)(4,4′-bpy)]·5HO} ( 1) had been synthesized by hydrothermal reaction of 5-(oxidediphenylphosphino)isophthalic acid, Cd(II) nitrate, NaOH and 4,4′-bipyridine (4,4′-bpy) as co-ligand. The novel compound was characterized by single crystal X-ray diffractometry as well as FTIR spectrum. Adjacent eight-member (CCdO) rings are connected each other through pairs of L ligands to result in a 1D double chain. Such ribbons are interconnected together by 4,4′-bpy to generate a 2D pillared layer, which are further held together by rich O-H···O hydrogen bonds to give a 3D supramolecular network. Solvent water molecules play an important role to bridge adjacent layers to form a 3D supramolecular architecture. The luminescence property and thermogravimetric analysis of title complex were investigated. [ABSTRACT FROM AUTHOR]