Jia Hua

Coordination polymers constructed by 1,3-bi(4-pyridyl)propane with four different conformations and 2,2′-dinitro-4,4′-biphenyldicarboxylate ligands: the effects of metal ions

Five coordination polymers, [Mn2(NBPDC)2(bpp)]n (1), [Co4(NBPDC)4(bpp)2(H2O)5.25]n (2), [Ni(NBPDC)(bpp)(H2O)2]n (3), [Zn(NBPDC)(bpp)]n (4) and [Cd2(NBPDC)2(bpp)]n (5) (NBPDC = 2,2′-dinitro-4,4′-biphenyldicarboxyl acid, bpp = 1,3-bi(4-pyridyl)propane), have been prepared and structurally characterized. In these compounds, NBPDC and bpp exhibit different coordination modes tuned by different metal ions, and construct various architectures by bridging a variety of inorganic building units. Compound 1 presents a hex net with point symbol for net: {36.418.53.6}. Compound 2 shows a self-penetrating ilc topology by linking Co4 clusters with NBPDC and bpp. Compound 3 presents a 2D structure with (4, 4) topology. Compound 4 shows a diamond network with a 5-fold interpenetrating architecture, featuring left-handed and right-handed helix chains. Compound 5 presents a pcu topology by linking rod-shaped secondary building units. The magnetic properties of compounds 1 and 2 have been characterized.

Design and construction of coordination polymers based on 2,2′-dinitro-4,4′-biphenyldicarboxylate and imidazole-based ligands: The effect of ligand length and metal ions

Five coordination polymers, Mn4(nbpdc)4(bip)(H2O)2 (1), Co5(nbpdc)4(bip)2(H2O)6(OH)2 (2), Cu5(nbpdc)4(bip)2(H2O)2(OH)2 (3), Zn5(nbpdc)4(bip)2(OH)2 (4), and Cd2(nbpdc)2(bip) (5), (H2nbpdc = 2,2′-dinitro-4,4′-biphenyldicarboxyl acid, bip = 1,5-bis(imidazole)pentane), have been prepared and structurally characterized. In these compounds, nbpdc and bip link different secondary building units (SBUs) to construct a variety of architectures based on different metals. Compound 1 presents a 3D hex net based on infinite rod-shaped SBUs. Compound 2 shows a 3D framework with mab topology based on Co5 clusters and exhibits an interesting self-penetration feature. Compound 3 presents a 3D framework with pcu topology constructed by Cu5 clusters. Compound 4 is a 3D framework with pcu topology based on infinite rod-shaped SBUs. Compound 5, like compound 4, also exhibits pcu topology constructed by rod-shaped SBUs, but they both possess different structures. The magnetic properties of compounds 1 and 2 have been characterized.

A coordination polymer of copper(I) iodide with 654 topology constructed from Cu4I4(DABCO)4

The coordination polymer of copper(I) iodide Cu4I4(DABCO)2 (DABCO = 1,4-diazabicyclo-[2.2.2]octane) was prepared by solvothermal methods, and its structure was determined by single-crystal X-ray diffraction. The structure contains a novel 654 topology and displays interesting self-penetration.

Syntheses, topological structures and properties of six metal–organic frameworks constructed from a flexible tetracarboxylate ligand

Six new metal–organic frameworks (MOFs), Co2O(odip)(py)2(DMSO)2·3H2O (1), Co2(odip)(H2O)(DMA)2·2DMA (2), Co4(odip)2(H2O)4(DMSO)2·5DMSO (3), [Zn2(odip)(DMF)2(H2O)]·2DMF·2H2O (4), Zn2(odip)(H2O) (5) and In(odip)·3ACN (6), have been synthesized from the 5,5′-oxydiisophthalic acid (H4odip) ligand under solvothermal conditions. These six compounds were characterized by single-crystal X-ray diffraction, power X-ray diffraction and relative physical methods. MOFs 1, 2 and 3 are constructed from the same ligand and metal-salt under the same temperature, but with different solvents, and they exhibit three different topologies. MOF 1 possesses a 3D 4-coordinated architecture with a (65·8) topology. MOF 2 features a 3D 4-coordinated net with a (42·63·8) topology and MOF 3 shows a 3D 4-coordinated framework with a (4·64·8)(4·65) topology. MOFs 4 and 6 have the same topology as MOF 2. MOF 5 exhibits a 3D 5-coordinated framework with a (44·66) topology. These results indicate that the solvent environment plays an important role in the formation of the final framework. Moreover, the photoluminescence properties of 4 and 5, and the magnetic properties of 1, 2 and 3 have been studied and discussed.

First coordination complex-linked vanadium selenite, [Cu(phen)]2V2Se2O11: hydrothermal synthesis and crystal structure

A novel bimetallic selenite, [Cu(phen)]2V2Se2O11, which is the first example of a coordination complex-linked vanadium selenite, has been hydrothermally prepared and characterized by X-ray crystallography.

Bis(4-amino-3,5-di-2-pyridyl-1,2,4-triazole-κ2N1,N5)diaquazinc(II) dinitrate

The asymmetric unit of the title compound, [Zn(C12H10N6)2(H2O)2](NO3)2, contains one-half of the complex molecule and one NO3 − anion. The ZnII ion displays a distorted tetragonal-pyramidal geometry with four N atoms from two chelating 4-amino-3,5-di-2-pyridyl-1,2,4-triazole (2-bpt) ligands in the basal plane and one water molecule occupying the apical site. Another water molecule at the opposite of the apical site has a weak interaction with the ZnII ion [Zn—O = 2.852 (5) Å]. The ZnII ion and the two water molecules lie on a twofold rotation axis. An extensive system of hydrogen bonds involving the NH2 groups of the 2-bpt ligands, water molecules and nitrate anions links all residues into a three-dimensional network.

Bis(4-amino-3,5-di-2-pyridyl-1,2,4-triazole-κ2N1,N5)diaqua­zinc(II) dinitrate

The asymmetric unit of the title compound, [Zn(C12H10N6)2(H2O)2](NO3)2, contains one-half of the complex molecule and one NO3 − anion. The ZnII ion displays a distorted tetragonal-pyramidal geometry with four N atoms from two chelating 4-amino-3,5-di-2-pyridyl-1,2,4-triazole (2-bpt) ligands in the basal plane and one water molecule occupying the apical site. Another water molecule at the opposite of the apical site has a weak interaction with the ZnII ion [Zn—O = 2.852 (5) Å]. The ZnII ion and the two water molecules lie on a twofold rotation axis. An extensive system of hydrogen bonds involving the NH2 groups of the 2-bpt ligands, water molecules and nitrate anions links all residues into a three-dimensional network.

Bis(4-amino-3,5-di-2-pyridyl-1,2,4-triazole-κN,N)diaqua-zinc(II) dinitrate.

The asymmetric unit of the title compound, [Zn(C12H10N6)2(H2O)2](NO3)2, contains one-half of the complex molecule and one NO3 − anion. The ZnII ion displays a distorted tetragonal-pyramidal geometry with four N atoms from two chelating 4-amino-3,5-di-2-pyridyl-1,2,4-triazole (2-bpt) ligands in the basal plane and one water molecule occupying the apical site. Another water molecule at the opposite of the apical site has a weak interaction with the ZnII ion [Zn—O = 2.852 (5) Å]. The ZnII ion and the two water molecules lie on a twofold rotation axis. An extensive system of hydrogen bonds involving the NH2 groups of the 2-bpt ligands, water molecules and nitrate anions links all residues into a three-dimensional network.