A twofold interpenetrating two-dimensional zinc(II) coordination polymer: synthesis, crystal structure and physical properties.

A novel twofold interpenetrating two-dimensional (2D) Zn coordination framework, poly[[(μ-1,3-bis(2-methyl-1H-imidazol-1-yl)benzene-κN:N)(μ-naphthalene-2,6-dicarboxylato-κO:O)zinc(II)] dimethylformamide monosolvate], {[Zn(CHO)(CHN)]·CHNO} or {[Zn(1,3-BMIB)(NDC)]·DMF} (I), where HNDC is naphthalene-2,6-dicarboxylic acid, 1,3-BMIB is 1,3-bis(2-methyl-1H-imidazol-1-yl)benzene and DMF is dimethylformamide, was prepared and characterized through IR spectroscopy, elemental analysis, thermal analysis and single-crystal X-ray diffraction. Single-crystal X-ray diffraction analysis revealed that (I) exhibits an unusual twofold interpenetrating 2D network. In addition, it displays strong fluorescence emissions and a high photocatalytic activity for the degradation of Rhodamine B (RhB) under UV-light irradiation.

A new two-dimensional Zn coordination polymer based on 1,3-bis(2-methyl-1H-imidazol-1-yl)benzene and 5-nitrobenzene-1,3-dicarboxylic acid: synthesis, crystal structure and physical properties.

A novel two-dimensional (2D) Zn coordination framework, poly[[μ-1,3-bis(2-methyl-1H-imidazol-1-yl)benzene](μ-5-nitrobenzene-1,3-dicarboxylato)zinc(II)], [Zn(CHNO)(CHN)] or [Zn(NO-BDC)(1,3-BMIB)] [1,3-BMIB is 1,3-bis(2-methyl-1H-imidazol-1-yl)benzene and NO-HBDC is 5-nitrobenzene-1,3-dicarboxylic acid], has been prepared and characterized by IR, elemental analysis, thermal analysis and single-crystal X-ray diffraction. Single-crystal X-ray diffraction analysis revealed that the compound is a new 2D polymer with a 6 topology parallel to the (10-2) crystal planes based on left-handed helices, right-handed helical NO-BDC-Zn chains and [Zn(1,3-BMIB)] clusters. In the crystal, adjacent layers are further connected by C-H.

A twofold interpenetrating three-dimensional Cd(II) coordination framework: poly[[μ2-1,3-bis(2-methyl-1H-imidazol-1-yl)benzene](μ3-5-nitrobenzene-1,3-dicarboxylato)cadmium(II)].

A twofold interpenetrating three-dimensional Cd(II) coordination framework, [Cd(C8H3NO6)(C14H14N4)]n, has been prepared and characterized by IR spectroscopy, elemental analysis, thermal analysis and single-crystal X-ray diffraction. The asymmetric unit consists of a divalent Cd(II) atom, one 1,3-bis(2-methyl-1H-imidazol-1-yl)benzene (1,3-BMIB) ligand and one fully deprotonated 5-nitrobenzene-1,3-dicarboxylate (NO2-BDC(2-)) ligand. The coordination sphere of the Cd(II) atom consists of five O-donor atoms from three different NO2-BDC(2-) ligands and two imidazole N-donor atoms from two different 1,3-BMIB ligands, forming a distorted {CdN2O5} pentagonal bipyramid.

Magnetic investigations of a two-dimensional coordination polymer with a three-dimensional supramolecular framework: poly[[bis[μ2-1,4-bis(1,2,4-triazol-1-yl)butane]bis(thiocyanato-κN)cobalt(II)] dihydrate].

In the title mixed-ligand metal-organic polymeric complex, {[Co(NCS)2(C8H12N6)2]·2H2O}n, the asymmetric unit contains a divalent Co(II) cation, which sits on an inversion centre, two halves of two crystallographically distinct and centrosymmetric 1,4-bis(1,2,4-triazol-1-yl)butane (BTB) ligands, one N-bound thiocyanate ligand and one solvent water molecule. The Co(II) atom possesses a distorted {CoN6} octahedral geometry, with the equatorial positions taken up by triazole N atoms from four different BTB ligands. The axial positions are filled by thiocyanate N atoms.

A one-dimensional coordination polymer based on Cd2O2 clusters: poly[aqua(μ3-4,4'-sulfonyldibenzoato)(3,4,7,8-tetramethyl-1,10-phenanthroline-κ(2)N,N')cadmium(II)].

In the title mixed-ligand metal-organic polymeric complex [Cd(C14H8O6S)(C16H16N2)(H2O)]n, the asymmetric unit contains a crystallographically unique Cd(II) atom, one doubly deprotonated 4,4'-sulfonyldibenzoic acid ligand (H2SDBA), one 3,4,7,8-tetramethyl-1,10-phenanthroline (TMPHEN) molecule and one water molecule. Each Cd(II) centre is coordinated by two N atoms from the chelating TMPHEN ligand, three O atoms from monodentate carboxylate groups of three different SDBA(2-) ligands and one O atom from a coordinated water molecule, giving a distorted CdN2O4 octahedral geometry. Single-crystal X-ray diffraction analysis reveals that the compound is a one-dimensional double-chain polymer containing 28-membered rings based on Cd2O2 clusters, with a Cd.

A one-dimensional coordination polymer with a three-dimensional supramolecular framework: catena-poly[[[(3,4,7,8-tetramethyl-1,10-phenanthroline)cadmium(II)]-μ3-4,4'-sulfonyldibenzoato] trihydrate].

In the title mixed-ligand metal-organic polymeric compound, {[Cd(C14H8O6S)(C16H16N2)]·3H2O}n, the asymmetric unit contains a crystallographically unique Cd(II) atom, one doubly deprotonated 4,4'-sulfonyldibenzoic acid (H2SDBA) ligand, one 3,4,7,8-tetramethyl-1,10-phenanthroline (TMPHEN) molecule and three solvent water molecules. Each Cd(II) centre is six-coordinated by two O atoms from a chelating carboxylate group of a SDBA(2-) ligand, two O atoms from monodentate carboxylate groups of two different SDBA(2-) ligands and two N atoms from a chelating TMPHEN ligand. There are two coordination patterns for the carboxylate groups of the SDBA(2-) ligand, with one in a μ1-η(1):η(1) chelating mode and the other in a μ2-η(1):η(1) bis-monodentate mode.

A fivefold interpenetrating diamond-like three-dimensional metal-organic framework: poly[(μ2-benzene-1,4-diacetato)[μ2-1,6-bis(1,2,4-triazol-1-yl)hexane]zinc(II)].

In the mixed-ligand metal-organic title polymeric compound, [Zn(C(10)H(8)O(4))(C(10)H(16)N(6))](n) or [Zn(PBEA)(BTH)](n) [H(2)PBEA is benzene-1,4-diacetic acid and BTH is 1,6-bis(1,2,4-triazol-1-yl)hexane], the asymmetric unit contains a Zn(II) atom, one half of a BTH ligand and one half of a doubly deprotonated H(2)PBEA ligand. Each Zn(II) centre lies on a crystallographic twofold rotation axis and is four-coordinated by two O atoms from two distinct PBEA(2-) ligands and two N atoms from two different BTH ligands in a {ZnO(2)N(2)} coordination environment. The three-dimensional topology of the title compound corresponds to that of a fivefold interpenetrating diamond-like metal-organic framework.

The coordination polymer poly[bis[μ2-2-(2,2'-bi-1H-imidazol-1-yl)acetato]cadmium].

The title compound, [Cd(C(8)H(7)N(4)O(2))(2)](n), crystallizes in the centrosymmetric triclinic space group P1 with an asymmetric unit consisting of a bivalent Cd(II) atom and two 2-(2,2'-bi-1H-imidazol-1-yl)acetate (BDAC(-)) anions. Two inversion-related BDAC(-) ligands are oppositely arranged and bind two Cd(II) ions to form a [Cd(2)(BDAC)(2)] rhomboid subunit which is bridged by another BDAC(-) ligand to form an infinite ladder along the a direction containing parallelogram grids. The three-dimensional supramolecular architecture is formed by hydrogen bonds and C-H···π and π-π interactions.

Poly[(μ3-benzene-1,4-diacetato)[μ2-1,4-bis(1,2,4-triazol-1-yl)butane]cadmium(II)]: self assembly into a three-dimensional supramolecular framework based on [Cd(μ3-benzene-1,4-diacetate)] double chains.

The title compound, [Cd(C(10)H(8)O(4))(C(8)H(12)N(6))](n), crystallizes with an asymmetric unit comprising a divalent Cd(II) atom, a benzene-1,4-diacetate (PBEA(2-)) ligand and a complete 1,4-bis(1,2,4-triazol-1-yl)butane (BTB) ligand. [Cd(PBEA)](n) double chains, arranged parallel to the c axis, are formed through an exo-tridentate binding mode of the PBEA(2-) ligands. These [Cd(PBEA)](n) double chains are pillared by tethering BTB ligands, in which the BTB shows a trans-trans-trans conformation, to establish [Cd(PBEA)(BTB)](n) two-dimensional coordination polymer (4,4)-layer slab patterns.

A novel two-dimensional (4,4) network based on dinuclear cadmium secondary building units: poly[(μ5-benzene-1,4-diacetato)[μ2-1,4-bis(1,2,4-triazol-1-yl)butane]cadmium(II)].

In the title mixed-ligand metal-organic polymeric compound, [Cd(C(10)H(8)O(4))(C(8)H(12)N(6))](n) or [Cd(PBEA)(BTB)](n) [H(2)PBEA is benzene-1,4-diacetic acid and BTB is 1,4-bis(1,2,4-triazol-1-yl)butane], the asymmetric unit contains one Cd(II) ion, one BTB molecule and one PBEA(2-) anion. The Cd(II) ion is in a slightly distorted pentagonal-bipyramidal geometry, coordinated by five carboxylate O atoms from three distinct PBEA(2-) anions and by two BTB N atoms. There are two coordination patterns for the carboxylate groups of the PBEA(2-) ligand, one being a μ(1)-η(1):η(1) chelating mode and the other a μ(2)-η(2):η(1) bridging mode, while the BTB molecule shows a trans-trans-trans conformation.