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Two new polyoxometalates [HN(C2H5)3]3[PMo12O40] (1) and [NH2(C2H4NH3)2]2[Mo5P2O23] (2) have been hydrothermally synthesized and characterized by IR, UV-Vis, XPS spectra, TG analyses, and single crystal X-ray diffraction. Crystal data for 1: monoclinic, space group C2/c, a = 24.651(5) Å, b = 10.822(2) Å, c = 22.413(5) Å, β = 120.37(3)°, and V = 5158.7(18) Å3; for 2: triclinic, space group P-1, a = 9.821(2) Å, b = 9.948(2) Å, c = 14.687(3) Å, α = 95.490(3)°, β = 98.870(3)°, γ = 95.710(3)°, and V = 1401.7(5) Å3. The crystal structure analyses reveal complex hydrogen bonds in both 1 and 2 in 3-D supramolecular arrays constructed from different polyoxoanions and organic ligands. [ABSTRACT FROM AUTHOR]

Two supramolecular compounds [Fe(2,2'-bipy)3]2[ [image omitted](Cl)] · 4.67H2O (1) and [Ni(enMe)3]2[ [image omitted](Cl)] · 2H2O (2) have been prepared under hydrothermal conditions and characterized by elemental analyses, IR, TGA, ESR, magnetic properties, and single crystal X-ray diffraction analyses. Crystal data for 1: tetragonal, I-42d, a = 13.6043(19), b = 13.6043(19), c = 50.544(10) Å, V = 9354(3) Å3; for 2: hexagonal, P6(3)/m, a = 12.6046(12), b = 12.6046(12), c = 22.563(5) Å, V = 3104.4(7) Å3. Compound 1 is constructed from cations [Fe(2,2'-bipy)3]3+, polyoxovanadates [ [image omitted](Cl)]6-, and water molecules. Compound 2 is composed of cations [Ni(enMe)3]2+, clusters [ [image omitted](Cl)]8-, and water molecules. There are hydrogen-bonding interactions between polyoxovanadates, organic moieties, and/or water molecules in 1 and 2, forming different 2-D layered networks. [ABSTRACT FROM AUTHOR]

The title compound, C13H7N5O3·C2H6O, was synthesized by the reaction of 2-cyanoacetamide, malononitrile and 3-nitrobenzaldehyde in water. The asymmetric unit contains two crystallographically independent 6-amino-4-(3-nitrophenyl)-2-oxo-1,2-dihydropyridine-3,5-dicarbonitrile molecules of similar conformation and two ethanol solvent molecules. The nitro group of one molecule is disordered over two positions with site-occupation factors of 0.688 (17) and 0.312 (17). The dihedral angles between the pyridine and benzene rings are 52.06 (11) and 65.12 (13)° in the two molecules. The crystal packing is stabilized by N—H...O, N—H...N, O—H...O and C—H...O intra- and intermolecular hydrogen bonds. [ABSTRACT FROM AUTHOR]

Two novel coordination compounds, [Zn(Hbimh) (H 2 O)]·H 2 O ( 1 ) and [Zn(Hbimh)]·(4,4ʹ-bpy) 0.5 ( 2 ) (H 3 bimh = benzimidazole-5,6-hydrazide, 4,4ʹ-bpy = 4,4ʹ-bipyridine), have been prepared from the hydrothermal in situ amidation cyclization reactions of H 3 bimdc (H 3 bimdc = benzimidazole-5,6-dicarboxylic acid) and hydrazine hydrate (N 2 H 4 ·H 2 O). Compound 1 exhibits a one-dimensional (1D) hexagon channel structure. Compound 2 is a three-dimensional (3D) framework structure, with 4,4ʹ-bpy fill the channels. We also obtained the ligand H 3 bimh. The compounds were characterized by IR, PXRD, TGA and elemental analysis. The fluorescence properties in the solid state at room temperature were also investigated. [ABSTRACT FROM AUTHOR]

Three new supramolecular compounds, [Cu( o -HPIDC)(bpy)(H 2 O)]·2H 2 O 1 , [Cu( o -H 2 PIDC)(phen)Cl]·[Cu(phen) 2 Cl]·10H 2 O·Cl 2 and {[Cd( o -H 2 PIDC)(H 2 O) 2 Cl]·H 2 O} 2 3 ( o -H 3 PIDC = 2-(pyridine-2-yl)-1H-imidazole-4,5-dicarboxylic acid, bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline), were hydrothermally synthesized and characterized. In compound 1 , the adjacent two supramolecular layers are constructed from different types of helical chains with the same pitch. In compound 2 , the adjacent 2D water-chloride layers, {[(H 2 O) 10 Cl] − } n , are pillared by [Cu( o -H 2 PIDC)(phen)Cl] units to form the overall 3D supramolecular network with 1D channels through O H⋯O hydrogen bond interactions. In compound 3 , two Cd(II) are linked into a binuclear [Cd 2 ( o -H 2 PIDC) 2 (H 2 O) 4 Cl 2 ] with a ten-membered ring by two o -H 2 PIDC − ligands. The three compounds self-assemble into 3D supramolecular structures via hydrogen bond and π-π stacking interactions. The fluorescence properties of compound 3 was also investigated. [ABSTRACT FROM AUTHOR]

Abstract: Two new supramolecular compounds based on tungsten–vanadium polyoxoanions formulated as [Cu(2,2′-bipy)3]2H14[PW2.2V9.8O40(VO)2[Cu(2,2′-bipy)2H2O]2][PW2.2V9.8O40(VO)2]·10H2O (1) and [Cu4(2,2′-bipy)4(H2O)2(PO4)2]H6.5[PW8.4V3.6O40]·2H2O (2) (2,2′-bipy=2,2′-bipyridine) have been synthesized hydrothermally and characterized by IR, TG, XPS and X-ray diffraction analyses. Crystal structure analyses reveal that compounds 1 and 2 exhibit novel 2D supramolecular layer structures constructed from tungsten–vanadium polyoxoanions and different types of secondary building units (SBUs), respectively, the different SBUs are formed by [Cu(2,2′-bipy)2H2O]2+ and [Cu(2,2′-bipy)3]2+ cations in compound 1 and [Cu4(2,2′-bipy)4(H2O)2(PO4)2]2+ cations in 2, respectively. Study of magnetic properties indicated the presence of antiferromagnetic behaviors for both compound 1 and 2. [Copyright &y& Elsevier]

By hydrothermal method, a novel supramolecular compound, Co(NIA)2(H2O)4 was synthesized and its structure was characterized with elemental analysis, FT-IR spectrum, TGA and X-ray diffractometer, indicating that it is a novel polyporous supramolecule with molecular ladder hydrogen-bonded chains. TGA curve shows its thermal stability up to 520 °C. [Copyright &y& Elsevier]