Formation of a 1-D metal–water chain and a 2-D water–sulfate layer containing cyclic water octamers in a 3-D supramolecular network

A new tetranuclear complex, {[Cu(phen)(OH)]₄(H₂O)₂}?·?(SO₄)₂?·?8H₂O (1) (phen = 1,10-phenanthroline), has been synthesized and characterized by elemental analysis, UV-Vis, IR, TG, and single-crystal X-ray diffraction. Complex 1 exhibits a 3-D supramolecular network with a 1-D metal–water chain consisting of tetranuclear hydroxo-bridged copper(II) clusters and water octamers and a 2-D water–sulfate layer containing cyclic water octamers with five types of O–H?···?O hydrogen-bonding motifs. The free ligand and its complex were screened for antibacterial activity against Gram-positive and Gram-negative bacteria.     

Hydrothermal Synthesis and Crystal Structure of a New 3-D Open-framework Zincophosphate

An open-framework zincophosphate, [C4N3H16][Zn4.5（PO4）4] 1, has been hydro- thermally synthesized and characterized by single-crystal X-ray diffraction. It crystallizes in the tetragonal space group P4 with a = 14.512（5）, c = 8.914（3）A, V = 1877.3（11）A3, C4H16NaO16P4Zn4.50, Mr = 780 24： Z = 4, Dc = 2.761 g/cm^3,μ= 6.103 mm^-1, F（000） = 1536, T = 298（2） K, R = 0.0416 and wR = 0.0816. In the structure, ZnO4 and PO4 tetrahedra are linked to each other, forming four-membered rings which are connected variably to form two secondary building units （SBUs）. The SBUs are connected so as to generate two chains along the c axis, which are further linked together alternatively via common oxygen atoms （Zn-O-P） giving rise to 8-ring-channels in the [001] direction, and the protonated guest diethylenetriamine （DETA） molecules sit in the middle of these channels. Other characterizations are also described by elemental analysis, thermal analysis and IR and fluorescent spectra.     

Synthesis and Sweetness of Pseddo-β-D and L-Frdctopyranose

Abstract

Pseudo-β-D (D-2) and L-fructopyranose (L-2), 1(S) and (1R)-(1,2/-3,4)-4-C-hydroxymethyl-1,2,3,4-cyclohexanetetrol, have been synthesized, starting from optically active endo-adducts of furan and acrylic acid, following the modified procedure used for the preparation of the racemic modification. It has been demonstrated that the D and L-enantiomers are nearly as sweet as D-fructose, and the former is somewhat sweeter than the latter.     

Synthesis and Crystal Structure of a 1-D Copper（Ⅱ） Polymer with 1-Hexylimidazole and Oxalate

A novel Cu（Ⅱ） complex has been prepared by means of self-assembly of CuCl2, 1-hexylimidazole L and oxalic acid （H2OX） in the presence of triethylamine, and structurally characterized by X-ray diffraction analysis. In complex 1, 1-D polymer chains are formed through pentacoordinated Cu（Ⅱ）, oxalate and bridging chlorine atoms. In the crystal packing of 1, the imidazole ring head-to-tail π-πstacking interactions exist between 1-D polymer chains and extend the 1-D polymer chains into 2-D supramolecular layers. The fluorescence emission spectra of L and 1 were described.     

Designed synthesis,structure, and 3-D topology of a supramolecular dimer and inorganic–organic cocrystal

Synthesis and structure of a supramolecular dimer and inorganic–organic cocrystal of composition [{Cu^IIL¹?(H₂O)}₂(C₈H₆O₄)] (1) are described (H₂L¹= N,N′-ethylenebis(3-ethoxysalicylaldimine); C₈H₆O₄ = terephthalic acid). Crystal engineering has been utilized for the designed synthesis of the title compound. Compound 1 crystallizes in a triclinic system with P 1 space group. The structure consists of terephthalic acid and two symmetry related inclusion products [Cu^IIL¹?(H₂O)], in which the water molecule is encapsulated in the O₄ compartment by forming bifurcated hydrogen bonds involving two hydrogen of water and phenolate and ethoxy oxygens of the compartmental ligand. Hydrogen bonding between encapsulated water molecules and terephthalic acid forms the supramolecular dimer. The title compound is an example of an inorganic–organic cocrystal as well. Weak interactions, such as semicoordination of phenoxo oxygen of one unit to the metal center of a symmetry related unit and C–H ··· O, and O–H ··· O hydrogen bonds result in generation of an overall 3-D topology in the title compound. The 3-D topology can be understood as interlinking of two different 2-D sheets.     

3-D Coordination polymer containing a 1-D tunnel filled with 4,4′-bpy: synthesis,crystal structure,and characterization

A coordination polymer, [Co(2-mpac)₂(4,4′-bpy)·(4,4′-bpy)] _n (2-mpac: 5-methyl-2-pyrazinecarboxylic acid; 4,4′-bpy: 4,4′-bipyridine), has been synthesized through hydrothermal synthesis and structurally characterized by X-ray single crystal diffraction. Single crystal X-ray diffraction analysis reveals a 3-D network featuring a 1-D tunnel filled with 4,4′-bpy molecules. Elemental analysis, IR, thermogravimetric analysis, and magnetic properties are presented.     

Urothermal Synthesis and Crystal Structure of a Zn（Ⅱ） Coordination Polymer with a 3-D Supramolecular Structure

A new metal-organic coordination polymer [Zn(hfipbb)(e-urea)]n(1,H2hfipbb = 4,4'-(hexafluoroisopropylidene)bis(benzoic acid),e-urea = ethylene urea) has been urothermally synthesized and characterized by elemental analysis and single-crystal X-ray diffraction.The title complex crystallizes in monoclinic,space group P21/c with a = 13.302(4),b = 10.981(3),c = 13.804(4) ,β = 93.587(5)°,V = 2012.3(10) 3,C20H14N2O5F6Zn,Mr = 541.72,Z = 4,Dc = 0.447 g/cm3, = 0.328 mm-1,F(000) = 272,R = 0.0340 and wR = 0.1107 for 4528 observed reflections(I >2σ(I)).In the structure of compound 1,two Zn(Ⅱ) ions are bridged by two carboxylate groups from two hfipbb ligands to form a dinuclear unit,and each dinuclear Zn(Ⅱ) unit is linked with its two adjacent dinuclear units through four hfipbb ligands into an infinite one-dimensional double-chain.The interesting structural feature of compound 1 is that the one-D double-chains are self-interconnected into a three-D supramolecular structure through hydrogen bonds between the coordinated e-urea molecules and carboxylate oxygen atoms(N1 and O2,N2 and O4).     

Hydrothermal Synthesis and Structure of a Novel 1-D Mn(II) Compound with Carboxlyto and Imidazole Ligands

1 INTRODUCTION Mn complexes containing carboxylato ligands attract considerable interest due to the richness in structural chemistry[1～4] and potential applications in catalysis[5, 6], for example, some highly efficient Mn catalase mimics[7, 8]. Recently, we focus on the hy- drothermal synthesis of manganiferous coordination polymers using multiple carboxylato and nitrogen- containing ligands[9, 10]. As one of the interesting bridge ligands, terephthalato ligand (ta) can provide multipl…     

Hydrothermal Synthesis and Structure of a Novel 1-D Mn(Ⅱ) Compound with Carboxlyto and Imidazole Ligands

A novel manganiferous polymeric complex [(imid)2(ta)Mn0.5]n (imid = imidazole, ta = terephthalato) was synthesized by the hydrothermal reaction of MnO2, terephthalic acid, imidazole, and H2O. Structure analysis indicates that the compound crystallizes in the triclinic system, space group P, with a = 8.1500(16), b = 8.5100(17), c = 9.0500(18) (A), α = 72.77(3), β = 65.50(3), γ = 77.22(3)°, V = 542.02(19) (A)3, Z = 2, Dc = 1.505 g/cm3, F(000) = 253, Mr = 245.69, μ(MoKα = 0.655 mm-1, R = 0.0733 and wR = 0.1703 for 1673 observed reflections (I > 2σ(I)). The compound is characteristic of a zigzag chain-like framework built up of ta bridge and (Imid)4Mn group. The 1-D frameworks are held together by H-bonds between the dangling N-H donors from imid and O acceptors from ta.     

From 2-D layer to 2-D → 3-D parallel interpenetration: syntheses,structures and luminescent properties

Two new coordination polymers based on 1,1′-(1,4-butanediyl)bis(imidazole) (bbi) and 5-hydroxyisophthalic acid (OH-BDC), [Co₂(HO-BDC)₂(bbi)₂]·H₂O (1) and [Zn(HO-BDC)(bbi)] (2), have been hydrothermally synthesized. The complexes were characterized by single-crystal X-ray diffraction, IR, and elemental analysis. The structure determination reveals that 1 manifests a deeply corrugated 2-D layer with a (4,4) lattice. For 2, there is a highly undulating 2-D (4,4) layer structure. The layers penetrate by each other to give a 2-D → 3-D parallel interpenetrating network. Fluorescence properties and thermal stabilities of 1 and 2 in the solid state have been studied.     

Two new 1-D and 3-D Wells–Dawson structures assisted by alkali metals

Two new Wells–Dawson based compounds containing alkali metals, [Ag(H₂biim)₂]₂·[Ag₅(H₂biim)₁₀Na₂(H₂O)₂(H_3/2P₂W₁₈O₆₂)₂]·12H₂O (1) and [Cd(H₂biim)₂?K(P₂W₁₈O₆₂)_1/2] (2) (H₂biim?=?2,2′-biimidazole), have been synthesized under hydrothermal conditions. In 1, two-supporting Wells–Dawson anions are linked by a [Ag(H₂biim)₂]⁺ subunit to form a dimer. The adjacent dimers are further connected by Na⁺ through (POM)O-Na-O(POM) bonds to build a 1-D chain. In 2, adjacent anions are linked by two [Cd₂(H₂biim)₂]⁴⁺ subunits and a 1-D chain is formed. Furthermore, the anion in the chain is fused by six K⁺ ions and a 3-D framework is obtained. The alkali metals exhibit crucial influence on the conversion of dimensionality assisting anions and Ag-H₂biim subunits to construct 1-D and 3-D frameworks. The electrochemical and photocatalytic properties of 1 and 2 have been investigated.     

Hydrothermal Synthesis, Crystal Structure and Properties of a Novel 2-D Grid-like Cd^Ⅱ Metal-organic Framework

1 INTRODUCTION The design and synthesis of metal-organic frame- work structures have been extensively studied owing to the potential discovery of novel functional ma- terials to be applied in the areas of absorption, ca- talysis, optics sensors, magnetism and molecular recognition[1～5]. The generation of supramolecular frameworks rests on the coordination geometry of metal ion, structural characteristics of organic ligand, solvent system and counter ion[6～10]. The most useful strategy to…     

Synthesis and Crystal Structure of a 1-D Chain Zinc(Ⅱ) Coordinated Polymer with N-p-Tolysulfonyl-glutamine

A novel coordination polymer {[Zn(ts-gln)(bipy)]3H2O}n (ts-glnH2=N-p-toly-sulfonyl-glutamine,bipy=2,2-bipyridine) has been prepared and structurally characterized by X-ray diffraction method. It crystallizes in orthorhombic,space group P212121 with a=8.2622(5),b=16.6244(10),c=18.2807(10) ,V=2510.9(3) 3,C22H28N4O8SZn,Mr=573.91,Z=4,Dc= 1.518 g/cm3,μ(MoKa)=1.115 mm-1,F(000)=1192,the final R=0.0262 and wR=0.0662 for 5691 independent reflections with Rint=0.0240. The zinc(Ⅱ) atom is coordinated by N(3) and N(4) atoms of a bipy molecule,two carboxylate O(1) and O(2A) and amino N(1) atoms of ts-gln ligands,resulting in a square-pyramidal geometry. The title complex consists of an infinite zigzag chain of zinc(Ⅱ) ions linked by the carboxylate of N-p-tolysulfonyl-glutamine.     

Hydrothermal Synthesis,Crystal Structure and Properties of a Novel 2-D Grid-like CdⅡ Metal-organic Framework

A novel Cd(Ⅱ) coordination polymer,{[Cd3(tzo)2(suc)(H2O)6]·(suc)}n (Htzo = 1,2,4-triazole,H2suc = succinic acid),has been synthesized from the reaction of aqueous solution of niques,and structurally characterized by X-ray analysis and spectral techniques.To the best of our knowledge,among the few documented triazole-cadmium coordination polymers,this complex presents a novel configuration.The deprotonated 1,2,4-triazole is in tridentate and succinate in bis-chelate modes to link the Cd(Ⅱ) centers,generating a 2-D grid-like network topology.Thermogravimetric analysis results show that the framework architecture is a stable porous material.The fluorescent emission has also been discussed.     

Assembly and Crystal Structure of a Novel 1-D Coordination Polymer of Copper(II) with Thiocyanate and 4-Cyanopyridine

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｃｒｙｓｔａｌｅｎｇｉｎｅｅｒｉｎｇｏｆｏｎｅ ,ｔｗｏ ,ａｎｄｔｈｒｅｅ ｄｉ ｍｅｎｓｉｏｎａｌｃｏｏｒｄｉｎａｔｉｏｎｐｏｌｙｍｅｒｓｗａｓ ,ｉｎｔｈｅｎｅａｒｐａｓｔｙｅａｒｓ ,ｏｆｇｒｅａｔｉｎｔｅｒｅｓｔａｎｄａｒａｐｉｄｌｙｄｅｖｅｌｏｐｉｎｇａｒｅａｏｆｒｅｓｅａｒｃｈｔｈａｔｈａｓｉｍｐｌｉｃａｔｉｏｎｓｆｏｒｔｈｅｒａｔｉｏｎａｌｄｅｓｉｇｎｏｆｎｅｗｆｕｎｃｔｉｏｎａｌｍａｔｅｒｉａｌｓ .1Ｔｈｉｓａｒｅａｈａｓａｄｖａｎｃｅｄｔｏａｓｔａｇｅａｔ…     

Synthesis and Crystal Structure of a 1-D Chain Zinc（Ⅱ） Coordinated Polymer with N-p-Tolysulfonyl-glutamine

A novel coordination polymer {[Zn(ts-gln)(bipy)]3H2O}n (ts-glnH2=N-p-toly-sulfonyl-glutamine,bipy=2,2-bipyridine) has been prepared and structurally characterized by X-ray diffraction method. It crystallizes in orthorhombic,space group P212121 with a=8.2622(5),b=16.6244(10),c=18.2807(10) ,V=2510.9(3) 3,C22H28N4O8SZn,Mr=573.91,Z=4,Dc= 1.518 g/cm3,μ(MoKa)=1.115 mm-1,F(000)=1192,the final R=0.0262 and wR=0.0662 for 5691 independent reflections with Rint=0.0240. The zinc(Ⅱ) atom is coordinated by N(3) and N(4) atoms of a bipy molecule,two carboxylate O(1) and O(2A) and amino N(1) atoms of ts-gln ligands,resulting in a square-pyramidal geometry. The title complex consists of an infinite zigzag chain of zinc(Ⅱ) ions linked by the carboxylate of N-p-tolysulfonyl-glutamine.     

Hydrothermal Synthesis and Crystal Structure of a New 2-D Organic–Inorganic Hybrid Wells–Dawson-Type Polyoxometalate

Abstract  

A new 2-D organic–inorganic hybrid Wells–Dawson-Type polyoxotungstate K[Cu(Im)₂]₆P₂W₁₈O₆₂·2H₂O·(OH) (Im = Imidazole) (1) has been synthesized under hydrothermal conditions and characterized by IR spectroscopy, TG, and single crystal X-ray structural analysis. Crystal data for 1: triclinic, P-1, a = 15.3676(12) ?, b = 15.5059(14) ?, c = 24.6437(19) ?, α = 98.088(2)°, β = 96.930(2)°, γ = 119.312(2)°, Z = 2. Single crystal X-ray structural analysis reveals that the [P₂W₁₈O₆₂]⁶⁻ polyoxoanion is linked by [Cu(Im)₂]⁺ cation to form a 1-D chain along the a axis which is connected by K⁺ cation down the c axis to form a 2-D layer.     

Synthesis,Structure and Luminescence of a 1-D Chain of Copper(Ⅰ) Cyanide Decorated by Triphenylphosphine

A new wave-like infinite chain coordination polymer [Cu3(CN)3(PPh3)4]n(1,PPh3=triphenylphosphine) has been synthesized by solution reaction and characterized by X-ray single-crystal structure diffraction analysis.The complex crystallizes in space group P1 with a=13.343(6),b=13.429(7),c=20.694(10),α=103.163(4),β=96.704(5),γ=101.981(6)o,V=3479(3)3,Z=2,C75H60Cu3N3P4,Mr=1317.76,Dc=1.258 g/cm3,F(000)=1356,μ=1.043 mm-1,the final R=0.0680 and wR=0.1305 for 9232 observed reflections with I2σ(I).The infinite chain is linked by C-H…π H bonding interactions to form a 2-D supramolecular network.Luminescent study reveals that the complex has green-light emission.     

Intermolecular interaction and magnetic coupling mechanism of a 2-D mixed-valence CuIICuI coordination polymer containing μ 1,1,3-SCN bridge

A 2-D Cu^ICu^II mixed oxidation state coordination polymer, [Cu^IICu^I(μ _1,3-SCN)₂(μ _1,1,3-SCN)(PhenE)] _n (PhenE: 2-ethoxy-1,10-phenanthroline), has been prepared and its crystal structure determined by X-ray crystallography. In the polymer, Cu^II is a distorted trigonal bipyramidal geometry and Cu^I has distorted tetrahedral coordination. Thiocyanate bridges in two modes, μ _1,3-SCN and μ _1,1,3-SCN, resulting in a 2-D coordination sheet. The crystal structure analysis shows that there is a splipped π–π stacking in the sheet. The fitting for the variable-temperature magnetic susceptibility data gave the magnetic coupling constant 2J?=??2.72?cm^?1 and zJ′?=??2.07?cm^?1. The magnetic interaction may be mainly ascribed to intermolecular π–π magnetic coupling.