Hydrothermal Synthesis and Structure of [CH3NH3]2[(VⅣO)2(VⅤO4)2]:A New Layered Mixed-valence Vanadium Oxide Incorporated with Organic Cations

A new layered mixed valence vanadium oxide, [CH 3NH 3] 2[(V ⅣO) 2(V ⅤO 4) 2], which contains interlamellar organic cations was prepared under hydrothermal conditions and its single crystal structure was determined. It crystallizes in a triclinic system with space group P 1, a =0 625 59(8) nm, b =0 639 84(9) nm, c =0 747 19(10) nm, α =78 718(2)°, β =80 099(2)°, γ =77 100(2). The compound contains mixed valence V 4+ /V 5+ vanadium oxide layers constructed from VO 4 tetrahedra, pairs of edge sharing VO 5 square pyramid and methylamine with protonated organic amines occupying the interlayer space.

A 2-D Copper Coordination Polymer[Cu(4,4'-bpy)(H_(2)O)_(4)](C_(4)H_(2)O_(4))(H_(2)O)_(4)Integrated by Hydrogen Bonds and VDW Interactions

The title compound, [Cu(4,4-bpy)(H2O)4](C4H2O4)(H2O)4 1, has been syn- thesized by the reaction of Cu(NO3)23H2O with 4,4-bipyridine and fumaric acid, and structurally characterized by X-ray diffraction analysis. Its crystal structure belongs to monoclinic, space group C2/c with a = 16.6350(5), b = 11.1667(2), c = 13.1371(4) ? = 125.144(1), C14H26CuN2O12, Mr = 477.91, Z = 4, V = 1995.47(9) 3, Dx = 1.591 g/cm3, m = 1.160 mm-1, F(000) = 996, R = 0.0331 and wR = 0.0883 for 1765 observed reflections (I > 2(I)). A two-dimensional network is formed in complex 1 through the hydrogen bonds and VDW interactions.

A Novel 3D Supramolecular Network Constructed from [Cu(4,4'-bipyridine)(O_2CMe)_2]_2 Molecular Ladders by Hydrogen Bonding

The title complex, {[Cu2（4,4＇-bipyridine）2（μ-O2CMe）2（O2CMe）2],H2O}n 1, was synthesized and structurally characterized by X-ray crystallography. It crystallizes in monoclinic, space group C2/c with a = 13.4474（5）, b = 11.7566（2）, c = 19.5380（6）A, β = 92.930（2）°, V = 3084.84（16） A^3, Z = 4, Cu2C28N409H30, Mr = 693.64, Dc = 1.494 g/cm^3, F（000） = 1424 and μ（MoKα） = 1.436 mm^-1. With the use of 2062 observed reflections （I 〉 2σ（I））, the structure was refined to R = 0.0769 and wR = 0.2154. In complex 1, the dimeric copper acetate units are linked through 4,4’-bipyridine to yield ID molecular ladders. These ladders are connected via O-H…O hydrogen bonds to generate 2D layers, which are further linked through C-H…O hydrogen bonds to give a 3D supramolecular network.

Study on the Synthesis and Properties of Metal-organic Complex Containing Samarium

A new rare earth organic complex with a double interleaved structure,namely[Sm(BDC)1.5(DMF)(H2O)]n(H2BDC=1,4-benzenedicarboxylic acid,DMF=N,N΄-dimethyl formamide)was synthesized.The crystal structure is of triclinic,space group P with a=8.6343(6),b=10.1470(5),c=11.2073(6)Å,α=65.495(5),β=71.626(5),γ=78.130(5)°,V=844.70(9)Å^(3),C_(15)H_(15)NO_(8)Sm,M_(r)=487.64,Z=2,D_(c)=1.917 g/cm^(3),F(000)=476,μ=3.519 mm^(-1),R=0.0380 and wR=0.0864 for 3504 observed reflections(I>2s(I)).The structure has been determined by single-crystal X-ray diffraction analyses and displays a 2-fold interpenetrated 3D network with the classical pcu topology.The compound was analyzed by X-ray powder,infrared spectroscopy,thermogravimetric analysis and fluorescent spectroscopy.The fluorescent property makes it a good candidate for photoactive materials.

Three New Isostructural Metal-organic Coordination Polymers from Triangular Pyridinedicarboxylate Ligand:Syntheses, Structures and Properties

Three new isostructural coordination polymers,namely,[Mg(cpna)(H2O)2]n(1),[Mn(cpna)(H_(2)O)_(2)]n(2)and[Co(cpna)(H_(2)O)_(2)]n(3)(H_(2) cpna=5-(3-carboxylphenyl)nicotic acid)are reported.They were synthesized by hydrothermal reactions of transition metal or alkaline earth metal chloride with 5-(3-carboxylphenyl)nicotic acid,respectively.Complexes 1~3 exhibit 2D layers with a 3,3-connected topology with Schl?fli symbol{4.82}.Such layers including hexagonal rings and a quadrangular ring are further extended into an ordered 3D framework by hydrogen bonds between the cpna2-ligands and water molecules.The rare complex 1 has excellent luminescence and can be used as luminescent materials,while 2 and 3 possess prominent magnetism with potential applications in magnetic materials.

Three Novel Luminescent Zinc(Ⅱ)Compounds Constructed by Employing Mixed-ligand Strategy

Three novel coordination polymers,[Zn(suc)(o-bix)]_(n)(1),[Zn(suc)(m-bix)·H_(2)O]_(n)(2)and[Zn_(2)(suc)_(2)(p-bix)_(2)·4H_(2)O]_(n)(3)(H_(2)suc=succinic acid,o-bix=1,2-bis(imidazol-1-ylmethyl)-benzene,m-bix=1,3-bis(imidazol-1-ylmethyl)-benzene,p-bix=1,4-bis(imidazol-1-ylmethyl)-benzene),have been synthesized and structurally characterized by elemental analysis,IR spectroscopy,thermogravimetric analysis,powder X-ray diffraction,and single-crystal X-ray diffraction.These three coordination polymers present various structures originated from auxiliary N-donor ligands with different configurations.Compound 1 shows a 2D network with 4^(4)-sql topology.Compound 2 exhibits an infinite chain,and the adjacent chains are extended into a 2D sheet by π-πstacking interactions.Changing the conformation of the N-donor ligand leads to 3 featuring a 3D framework with a novel 4-connected(6^(5)·8)topology.In addition,the solid-state photoluminescent properties of compounds 1~3 are investigated.