Structure and Luminescence Property of a Linear Tetranuclear Gold(Ⅰ)-thiolate Complex through Au-Au Interaction

The synthesis,structure and luminescent property of a tetranuclear gold（Ⅰ）complex with doubly bridging diethyldithiocarbamate（Et2dtc）and 1,1-bis（diphenylphosphino）ethene（（Ph2P）2C=CH2）are described.The complex crystallizes in monoclinic space group C2/c with a=26.785（7）,b=25.654（6）,c=12.277（3）A,β=106.879（5）°,V=8073（4）A^3,Z=8,C31H32Au2F6NO3P2S2Sb,Mr=1222.32,Dc=2.011 g/cm^3,F（000）=4592,Rint=0.0529,T=293（2）K,μ=8.157 mm^（-1）,the final R=0.0464 and wR=0.1444 for 5804 observed reflections with I〉2σ（Ⅰ）.The intramolecular and intermolecular Au¨Au distances are 2.8670（9）and 3.2367（9）A,respectively.Weak emission appears at 517 nm at room temperature in the solid state.

Synthesis, Structure and Luminescent Property of a 2D Cd(Ⅱ) Coordination Polymer Based on Mixed-ligands of 1,3-Bis(imidazol)propane and Pyridine-3,5-dicarboxylic Acid

A new Cd（Ⅱ） coordination polymer, namely, [Cd（1,3-bip）（3,5-pdc）]n （1,3-bip = 1,3-bis（imidazol）propane and 3,5-pdc = pyridine-3,5-dicarboxylic acid） has been synthesized under hydrothermal conditions. Compound 1 was characterized by infrared spectrum, elemental analysis, powder X-ray diffraction （PXRD） and single-crystal X-ray diffraction analysis. It crystallizes in monoclinic, space group P21/c with a = 1.40178（7）, b = 1.72502（12）, c = 1.41635（6） ran, β = 92.653（4）°, V = 3.4212（3） nm3, Z = 4, C16HIsCdNsO4, Mr = 453.73, Dc = 1.762 g/cm3, F（000） = 1808,μ = 1.310 mm1, R = 0.0899 and wR = 0.1945. In compound 1, each 3,5-pdc ligand links three Cd（lI） ions and each Cd（Ⅱ） attaches to bip ligands to form a complicated 2D double-layer structure. In addition, the thermal stability and luminescent property of 1 have been studied in the solid state at room temperature.

Synthesis,Crystal Structure and Photoluminescent Property of a Novel Dy^(3+) Coordination Compound Containing Rare(H_2O)_(22) Clusters

A novel Dy^（3＋） coordination compound,（H_2pipz）（H_3O）[Dy（pydc）_3]·11H_2O（1,pipz = piperazine and H_2pydc = pyridine-2,6-dicarboxylic acid）,has been hydrothermally synthesized and characterized by X-ray single-crystal diffraction,elemental analysis. It is interesting that the packing structure of compound 1 contains 22-core water clusters. Compound 1 is extended into a threedimensional supramolecular structure via O···H···O hydrogen bonding interactions. Furthermore,the luminescent property of compound 1 was also investigated.

Synthesis,Crystal structure and Luminescent Property of a New 3D Supramolecular Compound(C_6 H_6NO_2)_3(C_6H_5NO_2)(PW_(12)O_(40))·2H_2O

A supramolecular compound （C6H6NO2）3（C6H5NO2）（PW12O40）·2H2O including the Keggin-type [PW1O40]3- polyanion, [HC6H5NO2]＋ （protonated pyridine-4-carboxylic acid molecule）, C6H5NO2 （pyridine-4-carboxylic acid molecule） and two free H20 molecules has been synthesized by the hydrothermal method and characterized by elemental analysis, IR spectra, single-crystal X-ray diffraction and powder X-ray diffraction. The crystal belongs to orthorhombic, space group Pnnm with a = 1.0483（3）, b = 1.4368（6）, c = 2.0526（7） nm, V= 3.0918（18） nm3,Z = 2, F（000） = 3004, Mr= 3406.07, Dc= 1.757 g.m-3,μ = 41.241 mm-1, the final R = 0.0387 and wR = 0.1089 for 2091 observed reflections withI〉 2σ（I）. A total of 30431 reflections were collected, of which 3083 were independent （Rint = 0.0605）. S is 1.182. The title compound presents a 3-D structure via intermolecular hydrogen bonds among [PW12O40]3- polyanions and pyridine-4-carboxylic acid ligands. The ultraviolet and luminescence spectra have been studied at room temperature, of which the purple fluorescent emission is located at 363 nm when excited at 264 nm. Fluorescent emission of the compound derives from the π-π＊ transitions in the pyridine-4-carboxylic acid ligands.

Cd/Mn(Ⅱ) Complexes with Heterocyclic Substituted 1,2,4-Triazole Ligands：Syntheses,Crystal Structures,and Luminescence Properties

Based on a 3-（pyridine-2-yl）-4H-1,2,4-triazole ligand（Hpytr）, one 2D Cd（Ⅱ） coordination polymer [Cd I（pytr）]n（1） and one 2D Mn（Ⅱ） coordination polymer [Mn（N3）（pytr）（H2O）]n（2） have been synthesized and characterized by X-ray crystallography, elemental analysis, and fluorescence spectroscopy. 1 shows a layer coordination architecture linked by pytr ligand, and the Cd（Ⅱ） centers display slightly distorted square pyramid coordination geometries. Complex 2 shows a 2D pillared-layer coordination architecture bridged by N3-and pytr, and the Mn（Ⅱ） centers display slightly distorted octahedral geometries. The luminescent properties of 1 and the PXRD and thermal stability of complexes 1 and 2 were measured briefly.

Syntheses,Crystal Structures and Characterization of Two Coordination Polymers Based on Mixed Ligands

Two new coordination polymers,namely,{[Cd（1.5）（bc）2（HL）]（13）H2O}（2n）（1） and [Mn（ip）（H2L）（H2O）]n（2）（H2L = 3-（1 H-pyrazol-4-yl）-5-（pyridin-2-yl）-1,2,4-triazole,Hbc = benzoic acid,H2 ip = isophthalic acid） were constructed by solvothermal reaction.The compounds were characterized by elemental analysis,FT-IR spectroscopy,and single-crystal X-ray diffraction.Compound 1 displays a two-dimensional plane structure consisting of [Cd3（bc）2（HL）] subunits.Compound 2 possesses a one-dimensional chain structure and is further extended into a 3-D supramolecular architecture via hydrogen bonds.Moreover,photoluminescence studies showed compound 1 exhibits luminescent emissions with emission maxima at 375 nm.Magnetic susceptibility measurements of 2 indicate that domain antiferromagnetic interactions exist between Mn（Ⅱ） ions.In addition,thermogravimetric properties of 1 and 2 were also measured.

Crystal Structures,Characterizations and Fluorescence Properties of Two 3D Ca(Ⅱ)/Sr(Ⅱ)Coordination Polymers Based on 2-Sulfoterephthalate

Two alkaline earth metal coordination polymers [M（2-Hstp）（H2O）] （M = Ca2＋ （1） and Sr2＋ （2）, 2-H3stp = 2-sulfoterephthalate） were synthesized under hydrothermal conditions by the precursor [Mn（2-Hstp）2（4,4？-Hbpy）2] and alkaline earth metal salts. The two alkaline earth complexes are not isomorphic. Complex 1 crystallizes in the monoclinic space group P21/m, while 2 in the monoclinic space group P21/c, despite of their similar formulas. In 1, the Ca2＋ ion lies in a seven-coordinated pentagon bipyramidal configuration, coordinated with five 2-Hstp2- anions and one water molecule. However, the Sr2＋ ion in 2 is coordinated by nine oxygen atoms to form a single-capped square antiprism polyhedron. Both 1 and 2 exhibit π-π＊ emission of the 2-sulfotere- phthalate ligand.

Crystal Structure and Luminescent Properties of[Cu(phen)_2I][Bi(phen)I_4]

The title complex, [Cu（phen）2I][Bi（phen）I4], has been successfully synthesized by a solution method. Its crystal structure was determined by X-ray diffraction method, and crystallizes in triclinic, space group P1 with a = 10.3876（2）, b = 14.4258（5）, c = 14.7128（5） ？, α = 82.569（8）, β = 73.442（7）, γ = 79.299（8）°, V = 2069.68（11）A3, Z = 2, Dc = 2.323 g/cm3, F（000） = 1318, μ（Mo Kα） = 13.132 mm–1 and T = 293（2） K. The final R = 0.0472 and w R = 0.1147 for 6027 observed reflections with I 〉 2σ（I）. In the structure of the title compound, [Bi（phen）I4]– provides us an opportunity to survey the influence of coordination component on the structure of the cation in the [Cu（phen）2I][Y] system. X-ray diffraction and luminescent spectrum study of the complex are also described.

Simultaneous structure and luminescence property control of barium carbonate nanocrystals through small amount of lanthanide doping

Rare earth doping has been widely applied in many functional nanomaterials with desirable properties and functions,which would have a significant effect on the growth process of the materials.However,the controlling strategy is limited into high concentration of lanthanide doping,which produces concentration quenching of the lanthanide ion luminescence with an increase in the Ln^(3+)concentration,resulting in lowering the fluorescence quantum yield of lanthanide ion.Herein,for the first time,we demonstrate simultaneous control of the structures and luminescence properties of BaCO_3nanocrystals via a small amount of Tb^(3+)doping strategy.In fact,Tb^(3+)would partially occupy Ba^(2+)sites,resulting in the changes to the structures of the BaCO_3nanocrystals,which is primarily determined by charge modulation,including the contributions from the surfaces of crystal nuclei and building blocks.These structurally modified nanocrystals exhibit tunable luminescence properties,thus emerging as potential candidates for photonic devices such as light-emitting diodes and color displays.

Structural Diversity and Luminescent Properties of Metal-organic Frameworks Based on a Rare Sulfonate and Imidazole Co-Ligand System

Four types of luminescent properties of metal-organic frameworks（MOFs） with formulas [Cd（1,2-BIYB）2（H2O）2]n·n（AQ-1,5-DAD）（1）, [Cd（AQ-1,5-DAD）（1,3-BIYB）2]n（2）, [Cd（1,3-BIYB）]n·n（AQ-1,5-DAD）·n H2O（3）, and [Zn（1,4-BIYB）2]n·n（AQ-1,5-DAD）2·6H2O（4）,（Na2AQ-1,5-DAD = anthraquinone-1,5-disulfonic acid disodium, 1,2-BIYB = 1,2-bis（imidazol-1-ylmethyl）benzene, 1,3-BIYB = 1,3-bis（imidazol-1-ylmethyl）benzene, 1,4-BIYB = 1,4-bis（imidazol-1-ylmethyl）benzene） have been synthesized based on a rare sulfonate and imidazole Co-ligand system under different conditions. The structural features of four types of MOFs 1-4 are as follows： MOFs 1 show a 3D supramolecular compound in which the double one-dimensional chains are further cross-linked by hydrogen bonds. 2 exhibits a 2D network constructed by two different 1D chains. 3 features a 2D supramolecular network, in which the 1D chains and AQ-1,5-DAD are arranged alternately through hydrogen bonds. 4 posseses a 3D supramolecular structure constructed by a 2D network and one-dimensional hydrogen bonding chains. All compounds 1-4 are characterized by elemental analysis, infrared spectroscopy, and thermogravimetric analysis. The luminescence properties of 1-4 have been investigated.

A Cd(Ⅱ)Coordination Polymer with cds Topology Constructed by Polycarboxylate and Imidazole-containing Ligand

A new Cd（Ⅱ） coordination polymer,{[Cd（pda）（bimb）]·（H2O）（0.5）}n（1,H2pda=1,3-phenylenediacetic acid,bimb = 4,4-bis（1-imidazolyl）biphenyl）,has been synthesized and characterized by elemental analysis,IR spectroscopy,powder X-ray diffraction（PXRD） analyses and single-crystal X-ray diffraction techniques. Complex 1 shows a 4-connected two-fold interpenetrated three-dimensional（3-D） cds topology. In additional,photoluminescent properties of 1 and its dehydrated product have also been studied.