Hydrothermal Syntheses, Structure Characteristics and Magnetic Properties of a Series of New Molybdenum Arsenates Based on {(As3O3)2(Mo6O18)(MO6)}(M = Ni, (1); Co, (2); Zn, (3))

Three new polyoxometalates K2[H2（As3O3）2（Mo6O18）（NiO6）]？H2O （1）, K2[H2-（As3O3）2（Mo6O18）（CoO6）]？H2O （2） and [Zn（H4,4？-bpy）2（H2O）4][（As3O3）2（Mo6O18）（ZnO6）]？4H2O （3） （4,4？-bpy = 4,4？-bipyridine） have been synthesized under hydrothermal conditions and characterized by IR, elemental analyses, XPS and single-crystal X-ray diffraction analyses, respectively. Compound 1 represents a new 3D framework structure constructed from polyoxoanion [（As3O3）2（Mo6O18）（NiO6）]4- via covalent bond. Compound 2 has an identical structure with 1. Compound 3 represents a new 2D layer structure constructed from transition metal coordination cations [Zn（H4,4？-bipy）2（H2O）4]4＋, lattice water molecules and polyoxoanions [（As3O3）2- （Mo6O18）（ZnO6）]4- via multi-point N–H？？？O and O–H？？？O hydrogen bonding interactions. Crystal data： for 1, cubic, space group Pa-3, a = 15.0022（8） ？, V = 3376.5（3） ？3, Z = 24; for 2, cubic space group Pa-3, a = 15.1596（10）, V = 3483.88 ？3, Z = 24; for 3, monoclinic, space group C2/m, a = 19.699（4）, b = 14.223（3）, c = 9.1455（18） ？, β = 106.80（3）o, V = 2453.0（9） ？3, Z = 8. In addition, the magnetic behaviors for compounds 1 and 2 have been investigated.

Hydrothermal Synthesis, Crystal Structure,Thermal Stability and Photophysical Property of a Novel Zinc Complex with Mixed Ligands

A novel metal-organic coordination complex [Zn（CHIP）（AIC）]n （1, CHIP = 2-（4- chlorophenyl）-lH-imidazo[4,5-f][1,10]phenanthroline, A1C = 5-amino-isophthalic acid） has been synthesized by hydrothermal reactions and characterized by elemental analysis, thermogravimetric （TG） analysis, infrared spectrum （IR） and single-crystal X-ray diffraction. Complex 1 crystallizes in monoclinic, space group C2/c with a = 18.259（5）, b = 17.191（4）, c = 16.371（4） A, V= 4717（2） A3, C27H16C1NsOnZn, Mr= 575.29, Dc = 1.620 g/cm3, p（MoKa） = 1.202 mm-1, F（000） = 2335, Z = 8, the final R = 0.032 and wR = 0.074 for 4723 observed reflections （I 〉 2σ（I））. Single-crystal X-ray diffraction reveals that 1 exhibits one-dimensional （1D） double chains, which are linked by H-bond intersections into a 2D structure. TG analysis shows clear weight loss due to the decomposition of different ligands. The luminescent properties for the ligand and complex 1 were also studied.

Three New Silver Alkylenediphosphonates with Pillar-like Open-frameworks

Three new silver alkylenediphosphonates, [Ag2（HO3PCH2CH2CH2CH2PO3H）] 1, [Ag4（O3PCH2CH2CH2CH2PO3）] 2 and [Ag4（O3PCH2CH2CH2PO3（H2O）] 3, have been hydrotherreally synthesized and characterized by X-ray single-crystal and powder diffraction, elemental analyses, IR and thermogravimetric analyses （TGA）. The structures of these compounds are all threedimensional pillar-like open-frameworks with 18-membered [Ag2O4P4C8] channels for compound 1 and 2, and 16-member [Ag2O4P4C6] channels for compound 3. Both 2 and 3 contain interesting twodimensional Ag（Ⅰ） networks based on Ag...Ag interactions. 1,4-Butylene- and 1,3-propylene diphosphonate groups of 2 and 3 bond the first and second maximum metal atoms among metal organodiphosphonates with linking sixteen and fifteen silver（Ⅰ） atoms, respectively. In addition, the coordinated water molecules of 3 can be reversibly removed and recovered.

Synthesis, Crystal Structure and Characterization of the Host-guest Type UOF

A new uranium（Ⅵ）-polycarboxylate framework with honeycomb（6,3） nets {[Zn（phen）_2（H_2O）_2][（UO_2）_2（BDC）_3]·2H_2O}n（1, BDC = benzene-1,4-dicarboxylate） was hydrotherrmally synthesized by the reactions of Zn（NO_3）_2·6H_2O with phenanthroine, UO_2（NO_3）_2·6H_2O and benzene-1,4-dicarboxylate. The complex was structurally characterized by FT-IR spectroscopy, powder XRD and X-ray single-crystal diffraction. Crystal data for 1： monoclinic, space group Cc with M_r = 1522.19, a = 14.9385（10）, b = 20.4922（13）, c = 15.9728（10） ？, β = 100.1240（10）°, V = 4813.5（5） ？~3, Z = 4, D_c = 2.100 g？cm^（–3）, μ = 7.293 mm^（–1）, F（000） = 2872, the final R = 0.0224 and w R= 0.0677 for 6522 observed reflections with I 〉 2σ（I）. Hydrogen bonds and π-π stacking interactions contribute to the structural extension and stabilization. Experimental band gap of about 3.57 e V indicates its broad gap semiconductor nature. UV-Vis spectra and solid-state luminescence were discussed in detail. The compound exhibits photocatalytic activities for the degradation of rhodamine B.

Two Anderson-based supramolecular compounds modified by 4,4'-dipyridy synthesized in one-pot

Using symmetrical rigid organic ligand 4,4'-dipyridy(4,4'-bipy),two new Anderson-based supramolecular compounds,namely,[H_(2)(4,4'-bipy)]_(3)·(TeMo_(6)O_(24))·(H_(2)Mo_(6)O_(19))(1)and{Cu_(2)[H(4,4'-bipy)]_(2)(H_(2)O)_(6)(TeMo_(6)O_(24))}·4H_(2)O(2),were synthesized in one-pot under hydrothermal conditions.The compounds 1 and 2 have been tested by IR spectra,elemental analyses and single-crystal X-ray diffraction.Compound 1 contains one discrete Anderson anion,one Lindqvist anion and three 4,4'-bipy organic ligands.The anions and 4,4'-bipy alternate with each other by hydrogen bonding,building a supramolecular 1D chain.Adjacent 1D chains are interlinked through hydrogen bonding interactions to further connect a supramolecular 2D layer.Compounds containing both Anderson and Lindqvist polyanions are not common in the crystal structure of POMs.Compound 2 contains one Anderson anion and two metal-organic subunits{Cu_(2)[H(4,4'-bipy)]_(2)(H_(2)O)_(6)}^(6+)as modifiers.The Anderson anions and{Cu_(2)[H(4,4'-bipy)]_(2)(H_(2)O)_(6)}^(6+)subunits are organized into alternating through hydrogen bonding interactions to construct a supramolecular 1D chain.Additionally,the electrochemical properties of compounds 1 and 2 as well as photocatalytic properties are investigated.Results show that compounds 1 and 2 have photocatalytic activity,which can photocatalyze the degradation of organic dyes MB and AF.Also,compounds 1 and 2 have good electrochemical properties for amperometric detection of NO2-and Cr(Ⅵ).Furthermore,Compound 2 can be used as materials of supercapacitor.

Structural Regulations of Layered Borates:From Centric Layers to Chiral Porous Layers

Three pentaborates were made by precise structural regulations under hydrothermal conditions,namely,K_(2)Cs-[B_(5)O_(8)(OH)]·0.5CO_(3)(1),KNa_(4)Cs[B_(5)O_(8)(OH)]_(2)·2OH(2),and NaBa[B_(5)O_(8.5)(OH)](3).Compound 1 features the typical 2D layers constructed from the four-connected B_(5)O_(10)(OH)clusters.By adjustment of the reactants and pH values of the systems to remove interlayered CO_(3)^(2−)groups,the centric layers in 1 were transformed to the chiral layers of 2.By further adjusting cationic templates based on host−guest charge matching,the B_(5)O_(10)(OH)cluster unit was transformed to B_(5)O_(11)(OH),which built the chiral porous layers of 3.The chiral compounds 2 and 3 exhibit moderate second harmonic generation(SHG)responses of 1.1 and 1.7 times that of KDP(KH_(2)PO_(4)).The structural regulations actualize the evolutions on both structural symmetries and dimensions.