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Abstract: A novel 2D cobalt(II) coordination polymer comprising left- and right-handed helical chains, {[H2bpp][Co2(bpp)2(Hbtec)2(H2O)4]·(H2O)5}n (1) (bpp=1,3-bis(4-pyridyl)-propane and H4btec=1,2,4,5-benzenetetracarboxylate), was prepared under hydrothermal conditions and characterized by single-crystal X-ray diffraction method. Complex 1 provides suitable hydrophilic channel in which lattice water molecules accumulate, forming a (H2O)5 helicate, stabilized by anchoring to the host structure through hydrogen-bonding interactions involving alternating water molecules and the carboxylate oxygen atoms of Hbtec3− ligands. [Copyright &y& Elsevier]

Abstract: A novel (CH3OH)(H2O)5 binary cluster is trapped in a photoluminescent silver(I) coordination polymeric host, [Ag2(bpp)2(H2O)(ssa)·4H2O·CH3OH]n (1, bpp=1,3-bis(4-pyridyl)propane, H2ssa=5-sulfosalicylic acid). The heterohexamer can be viewed as either a D 5 water pentamer with a dangling methanol molecule or a combination of D 4 tetrameric water and methanol–water heterodimer. This well-resolved heterohexamer may behave as a useful model helping us to further understand phase behavior of binary methanol–water system. The luminescent behavior of 1 was also discussed. [Copyright &y& Elsevier]

Abstract: The ultrasonic reaction of Ag2O, bipy and H2aze gave rise to a novel Ag(I) mixed-ligand coordination polymer, namely [Ag(aze)(bipy)]·(H2O)3 (1) (bipy=4,4′-bipyridine, H2aze=azelaic acid). In 1, Ag(I) ions are linked by bipy and aze ligands to form a single two-dimensional (2D) undulated net with a (6,3) topology, incorporating Ag6(bipy)4(aze)2 windows of 22.58×11.06Å based on Ag⋯Ag distances. A pair of identical 2D single nets are interconnected via π⋯π stacking and unsupported Ag⋯Ag interactions to generate a 2D double-layered net. A discrete water hexamer composed of a new planar tetrameric water ring and two pendent water molecules is perpendicularly located in each hydrophilic cavity of the 2D bilayer and acts as a ‘glue’ to assemble adjacent 2D double-layered nets into a three-dimensional (3D) structure. [Copyright &y& Elsevier]

Abstract: Two reduced molybdenum(V) phosphates, (H2dien)4[CaMo12O24(OH)6(HPO4)8]·nH2O (1) and (H2dien)4[Ba2(H2O)4CaMo12O24(OH)6(HPO4)4(PO4)4]·nH2O (2) (dien=diethylenetriamine) have been prepared under hydrothermal conditions and characterized by elemental analyses, IR, UV–vis, cyclic voltammetry and single-crystal X-ray diffraction. [Mo6P4] units in both structures are linked by octahedrally coordinated Ca(II) cations into sandwich-shaped [Ca(Mo6P4)2] clusters. While the clusters in 1 are discrete, those in 2 are interconnected through BaO9 polyhedra into a three-dimensional framework structure. It was indicated that the compounds exhibit photocatalytic activity in the bleaching of rhodamine B. [Copyright &y& Elsevier]

Abstract: Layered nanocomposite PEG/WS2, intercalating oligomeric poly(ethylene glycol) (PEG6000) into the tungsten disulfide host galleries, was synthesized using the exfoliation-adsorption technique. X-ray diffraction revealed that the intercalated oligomer within the host galleries is in a double-layer arrangement with an interlayer expansion of about 8.8Å. The optimum conditions were explored to prepare the single-phase product with a composition of Li0.12(PEG)1.51WS2. Thermal analyses suggested that the resulting material shows good thermal stability, with the decomposition of the interacted oligomeric chains within the disulfide galleries occurring at around 258°C. Despite high conductivity of the host material, those of the PEG/WS2 nanocomposite were found to be high in the order of 1×10−2 Scm−1 at ambient temperature, resulted from the host guest–host charge transfers. [Copyright &y& Elsevier]