A series of organic-inorganic hybrid compounds formed by [P2W18O62]6- and several types of transition metal complexes.

Five new organic-inorganic hybrid compounds based on [P2W18O62]6- (abbreviated as {P2W18}) and several types of transition metal complexes (TMCs) have been synthesized and characterized by IR, UV-Vis, XRD, cyclic voltammetry measurements and single crystal X-ray diffraction analysis. [Cu(phen)2][Cu(phen)(H2O)3][Cu(phen)2(H2O)][P2W18O62]·8H2O (1) (phen = 1,10-phenanthroline) is a {P2W18} bi-supported complex of phen, while [Cu(2,2'-bpy)(H2O)2]2[Cu(2,2'-bpy)2][P2W18O62]·3.5H2O (2) (2,2'-bpy = 2,2'-bipyridine) is a 1-D chain structure formed by {P2W18} and copper complexes of 2,2'-bpy. [Ag(2,2'-bpy)2]5[HP2W18O62]·H2O (3), [Ag(2,2'-bpy)(H2O)]2[Ag(2,2'-bpy)]2[Ag2(2,2'-bpy)3][P2W18O62] (4), and [Ag(2,2'-bpy)(H2O)]3[Ag2(2,2'-bpy)3][Ag(2,2'-bpy)][P2W18O62]·H2O (5) are constructed from {P2W18} and silver complexes of 2,2'-bpy. Compounds 4 and 5 are novel dimers of {P2W18} joined by silver complexes, while compound 3 contains two different kinds of silver complexes, forming a novel supramolecular structure. Each of the five compounds is formed by {P2W18} and more than one type of TMC. The formation mechanism of these compounds has been carefully discussed. In addition, we also synthesized two supramolecular structures based on {P2W18} and organic moieties: [H6P2W18O62](phen)5.5 (6) and [H6P2W18O62](phen)3·43H2O (7). The catalytic properties of these compounds were also tested.

Crystal structure of a binuclear nickel(II) complex constructed of 1H-imidazo[4,5-f][1,10]phenanthroline and doubly deprotonated benzene-1,3,5-tri-carb-oxy-lic acid.

The title complex, [Ni2(C9H4O6)2(C13H8N4)2(H2O)4]·2H2O, bis-(µ-5-carb-oxy-benzene-1,3-di-carboxyl-ato-κ(2) O (1):O (1'))bis-[di-aqua(1H-imidazo[4,5-f][1,10]phenanthroline-κ(2) N (7),N (8))nickel(II)] di-hydrate, was obtained under solvothermal conditions by the reaction of benzene-1,3,5-tricarboxylic acid (H3BTC) with Ni(NO3)2 in the presence of 1H-imidazo[4,5-f][1,10]phenanthroline (IP). The crystal has triclinic (P-1) symmetry with a centrosymmetric binuclear nickel(II) cluster. The Ni(II) atom is coordinated by two N atoms from a chelating 1H-imidazo[4,5-f][1,10]phenanthroline ligand, two carboxyl-ate O atoms from two 5-carb-oxy-benzene-1,3-di-carboxyl-ate ligands and two water mol-ecules in a slightly distorted octa-hedral geometry. Two carboxyl-ate groups bridge two Ni(II) cations, forming the binuclear complex. Extensive N-H⋯O, O-H⋯O and O-H⋯N hydrogen bonding is present in the crystal structure, forming a three-dimensional supermolecular framework. Weak π-π stacking is observed between parallel HBTC(2-) and IP ring systems, the face-to-face separation being 3.695 (2) Å.

Two unprecedented porous anionic frameworks: organoammonium templating effects and structural diversification.

Two unprecedented 3D porous anionic metal-organic frameworks, [Me2NH2]2[Cd2(bpdc)3].4dma 1 and [Me2NH2]2[Cd2(NH2bdc)3].4dma 2 (dma = N,N'-dimethylacetamide, bpdc = 4,4'-biphenyldicarboxylate, NH(2)bdc = 2-amino-1,4-benzenedicarboxylate) have been solvothermally synthesized with a dimethylammonium cations template. Both 1 and 2 are constructed from low-symmetry SBUs. 1 has a chiral framework with helical nanotube-like channels, and 2 has a MOF-5-like motif. The fluorescence, N2 adsorption and ion-exchange properties for 1 have been examined.

Combination of POMs and deliberately designed macrocations: a rational approach for synthesis of POM-pillared metal-organic framework.

Two POM-pillared 3D porous compounds, [Cu(I)Cu(II)(Cu(II)fcz)(2)(H(2)O)(5)(PMo(VI)(10)Mo(V)(2)O(40))].6H(2)O () and [Cu(I)(2)(Cu(II)fcz)(2)(H(2)O)(2)(PMo(VI)(8)V(V)(3)V(IV)(3)O(42))].6H(2)O () (Hfcz = fluconazole, (1-(2,4-difluorophenyl)-1,1-bis[(1H-1,2,4-triazol-1-yl)methyl]benzyl alcohol) have been constructed based on different polyanions, (Cufcz)(2)(2+) macrocations and copper cations by the hydrothermal method. The (Cufcz)(2)(2+) macrocations link Cu cations to generate a 2D wavelike cationic sheet. Then the POM anions act as pillars to the cationic sheet to form different POM-pillared 3D frameworks. In compound 2 , the polyanion exhibits a rare coordination mode and acts as a penta-dentate ligand, which acts as to pillars to the cationic sheet to form an unprecedented 3D (3,4,5,6)-connected open framework with (3.6.7)(3(2).6.7(3))(3(3).4.6(2).7(3).8)(3(4).4(2).6(2).7(6).8)(3(2).6(2).7(6).8(4).10) topology. In compound , polyanions covalently link cationic sheets to extend to an unusual 3D (3,4,6)-connected framework with the (5(2).6)(5(2).6(2).7.9)(5(4).6(4).7(4).9(3)) topology. To the best of our knowledge, it is the first time that POM-pillared 3D metal-organic frameworks have been realized by combining POMs with deliberately designed macrocations and transition-metal ions, using a rational approach for synthesis of POM-based open metal-organic frameworks. In addition, the electrochemical behaviors of compounds 1 and 2 have been investigated.

A 3D chiral nanoporous coordination framework consisting of homochiral nanotubes assembled from octuple helices.

A 3D chiral nanoporous coordination framework consisting of homochiral nanotubes assembled from octuple helices with a 19.4 A by 22.4 A aperture is formed by the parallel alignment of eight infinite helical chains.

A novel cadmium(II) coordination polymer with biphenyl-3,3',4,4'-tetracarboxylic acid and 4,4'-bipyridine.

A novel cadmium(II) coordination polymer, poly[[[bis(4,4'-bipyridine)cadmium(II)]-mu(3)-4,4'-dicarboxybiphenyl-3,3'-dicarboxylato] 0.35-hydrate], {[Cd(C(16)H(8)O(8))(C(10)H(8)N(2))(2)].0.35H(2)O}(n), was obtained by reaction of Cd(CH(3)COO)(2).3H(2)O, 4,4'-bipyridine (4,4'-bpy) and biphenyl-3,3',4,4'-tetracarboxylic acid (H(4)L) under hydrothermal conditions. Each Cd(II) atom lies at the centre of a distorted octahedron, coordinated by four O atoms from three H(2)L(2-) ligands and N atoms from two monodentate 4,4'-bpy ligands. Each H(2)L(2-) ligand coordinates to three Cd(II) atoms through two carboxylate groups, one acting as a bridging bidentate ligand and the other in a chelating bidentate fashion. Two Cd atoms, two H(2)L(2-) anions and four 4,4'-bpy ligands form a ring dimer node, which links into an extended broad zonal one-dimensional chain along the c axis.

A novel copper(II) coordination polymer with 2,2'-bipyridyl-3,3'-dicarboxylic acid.

A novel copper(II) coordination polymer, poly[[[aquacopper(II)]-mu3-2,2'-bipyridyl-3,3'-dicarboxylato-kappa4N,N':O:O'] dihydrate], {[Cu(C12H6N2O4)(H2O)].2H2O}n, was obtained by the reaction of CuCl2.2H2O and 2,2'-bipyridyl-3,3'-dicarboxylic acid (H2L) in water. In the molecule, each Cu(II) atom is five-coordinated and lies at the centre of a square-pyramidal basal plane, bridged by three L ligands to form a two-dimensional (4,4)-network. Each L moiety acts as a bridging tetradentate ligand, coordinating to three Cu(II) atoms through its two aromatic N atoms and two O atoms of the two carboxyl groups. The two-dimensional square-grid sheets superimpose in an off-set fashion through the inorganic water layer.

A new system in organooxotin cluster chemistry incorporating inorganic and organic spacers between two ladders each containing five tin atoms.

Hydrolysis of dibenzyltin dichloride in ethanol has been found to give an unprecedented carbonate anion (CO(3) (2-))-bridged double-ladder organooxotin cluster, [(R(2)SnO)(3)(R(2)SnOH)(2)(CO(3))](2) (1, R = C(6)H(5)CH(2)), with five tin atoms in each ladder. With the aim of obtaining organooxotin clusters with large cavities suitable for host-guest chemistry, we used 1,1'-ferrocenedicarboxylic acid (H(2)L(a)) and hexanedioic acid (H(2)L(b)) to replace the carbonate anions (CO(3) (2-)), and thereby clusters [(R(2)SnO)(3)(R(2)SnOH)(2)L(a)](2) (2) and [(R(2)SnO)(3)(R(2)SnOH)(2)L(b)](2) (3) were obtained. When 1 was treated with benzoic acid (HL(c)) in different stoichiometric ratios (1:4, 1:10), ladder cluster (R(2)SnO)(3)(R(2)SnOH)(2)(L(c))(2) (4) and drum cluster [RSn(O)L(c)](6) (5) were obtained. Through the hydrolysis of Cy(2)SnCl(2) (Cy = C(6)H(11)) and (C(6)H(5)CH(2))(2)SnCl(2), two interesting ethanolate-modified clusters [Cy(2)(C(2)H(5)O)SnOSn(C(2)H(5)O)Cy(2)](2) (6) and [(R(2)SnO)(3)(R(2)SnOH)(R(2)SnOC(2)H(5))(CO(3))](2) (7) were obtained. All the tin atoms in these ladder clusters are five-coordinate surrounded by two alkyl groups and three O atoms, and have distorted trigonal-bipyramidal coordination environments with two carbon atoms and one O atom in the equatorial positions and two O atoms in the axial positions. The structures of all these compounds have been established by single-crystal X-ray diffraction analyses.