Metal-organic Coordination Complexes Research Articles

Synthesis, structures and properties of two metal-organic coordination polymers derived from manganese(ΙΙ), thiabendazole and polydentate carboxylic acids.

Two novel binuclear Mn(II) metal-organic coordination complexes [Mn2(TBZ)2(CDC)(C2O4)]n (1), {[Mn2(TBZ)2(BDC)0.5(BTC)(H2O)2]·ET}n (2), (where TBZ = thiabendazole, H2CDC = trans-1,4-cyclohexanedicarboxylic acid, H2C2O4 = oxalic acid, H3BTC = 1,3,5-benzenetricarboxylic acid, ET = ethanol, H2BDC = 1,4-benzenedicarboxylate) have been hydrothermally synthesized and characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis, electrochemical analysis and single crystal X-ray diffraction. The X-ray structure analysis reveals that 1 is s two-dimensional layer and 2 is s one-dimensional chain. In complex 1, it reveals 2-D layers composed of multi-(bidentate) bridging ligands (CDC and C2O4), and in 2, the coordinated BTC ligands adopt a monodentate mode and with BDC ligands adopt alternately chelating Mn1 and Mn2 bridges into 1-D chains. The 3-D structures of the two complexes are stabilized by π-π stacking interactions and hydrogen bonds.

Synthesis, Crystal Structure, and Properties of Two Novel Complexes Based on Zaltoprofen Ligand

Two novel metal-organic coordination complexes [Cd(Zalto profen)2(H2O)3](H2O) (1), [Zn(Zaltoprofen)(H2O)]n (2) (where zaltoprofen = 5-(1-carboxyethyl)-2-(phenylthio)phenylacetic acid) have been synthesized under normal conditions and hydrothermal conditions, respectively. And characterized by single crystal X-ray diffraction, elemental analysis, spectral method (IR), powder X-ray diffraction (XRD), and fluorescent properties. Compound 1 crystallizes in the monoclinic Cc space group while compound 2 in the monoclinic system with space group P21 /c. [Cd(Zaltoprofen)2(H2O)3](H2O) (1) features 0-D structural, the hydrogen-bonds play a vital role in determining the crystal packing and construction of the extended 3-D supramolecular network. [Zn(Zaltoprofen)(H2O)]n (2) displays a 2D net with alternately arranged left- and right-handed helical chains. The O–H···O hydrogen bonding play an important role in stabilizing the structure. Supplemental materials are available for this article. Go to the publisher's online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental file.

Synthesis, Structures, and Properties of Two Zinc(II) and Cadmium(II) Supramolecular Complexes Based on Diphenic Acid

Two novel binuclear metal-organic coordination complexes [Zn2(dpa)2(phen)2(H2O)2] (1), [Cd2(dpa)2(btz)2(H2O)2] (2) (where H2dpa = diphenic acid, phen = 1,10-phenanthroline, btz = thiabendazole) have been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction, spectral method (IR), elemental analysis, and fluorescent properties. Compound 1 crystallizes in the triclinic P-1 space group while compound 2 in the monoclinic system with space group P2(1)/n. The binuclear cluster are stabilized by O‒HO hydrogen bond and further fitted together into 3-D supramolecular network by π–π stacking interactions and hydrogen bonds. The luminescence measurements reveal that two complexes exhibit strong fluorescent emissions in the solid state at room temperature.

Three New Metal–Organic Polymers Based on Flexible 3-(4-(Carboxymethoxy) Phenyl) Propanoic Acid: Crystal Structures, Luminescent and Magnetic Properties

Three new metal–organic coordination complexes, [Zn2L(bpp)2Cl2] n (1), [ZnL(bipy)] n (2), [NiL(bipy)(H2O)] n (3), have been synthesized through hydrothermal reactions of flexible 3-(4-(carboxymethoxy)phenyl) propanoic acid(H2L) with different pyridyl-containing 1,3-bis(4-pyridyl)propane(bpp) or 4,4′-bipyridine(bipy) ligand, and they are characterized by elemetal analysis and single-crystal X-ray diffraction techniques. Complex 1 has a 2-D layer supramolecular network composed of 1-D distorted trapezoidal chains via C–H···π stacking interactions. Complex 2 displays a 2-D lattice-shaped layer structure. Complex 3 has three kinds of O–H···O intermolecular hydrogen bonds, exhibiting a 3-D supramolecular framework. The luminescent properties of complex 1 and 2 have indicated the mixture characteristic of intraligand and ligand-to-ligand charge transition. The magnetic property of 3 has shown the ferromagnetic coupling between Ni2+ ions.

Synthesis, crystal structures and properties of two Cd(II) complexes based on Zaltoprofen

Two metal-organic coordination complexes, [Cd(Zaltoprofen)(phen)]n (1) and [Cd(Zaltoprofen)(btz)]n (2) (where Zaltoprofen = 5-(1-carboxyethyl)-2-(phenylthio)phenylacetic acid, phen = 1,10-phenanthroline, btz = thiabendazole), have been synthesized by reaction of Cd(NO3)2 with Zaltoprofen, 1,10-phenanthroline or thiabendazole under hydrothermal conditions and characterized by single crystal X-ray diffraction, IR spectra, elemental analyses, powder X-ray diffraction (XRD), electronic spectra (UV-vis) and fluorescent properties. Compound 1 crystallizes in the monoclinic P21/c space group and 2 in the monoclinic system with space group P21/n. [Cd(Zaltoprofen)(phen)]n (1) features a 1-D zigzag chain. The zigzag chains are linked to form a 2-D layer through π–π stacking interactions. [Cd(Zaltoprofen)(btz)]n (2) displays a 2D net with alternately arranged left- and right-handed helical chains.

Synthesis, Crystal Structures and Properties of Two Binuclear Supramolecular Complexes Based on Biphenyl-2,2'-dicarboxylic Acid Ligand

Two novel binuclear metal-organic coordination complexes [Cd2(Hdpa)4(bpy)2] (1), [Dy2(dpa)2(bpy)2(NO3)2(H2O)2](bpy) (2) (where H2dpa = biphenyl-2,2'-dicarboxylic acid, bpy = 2,2'-bipyridine) have been synthesized under hydrothermal conditions and characterized by single crystal X-ray diffraction, spectral method (IR), elemental analysis (EA), powder X-ray diffraction (XRD), electronic spectra (UV-vis), fluorescent in the solid state and thermogravimetric analysis (TGA). Complexes 1-2 crystallizes isomorphously in the Triclinic space group P-1. The π-π stacking interactions and hydrogen-bonds play a vital role in determining the crystal packing and construction of the extended 3-D supramolecular network.

Growth, spectroscopic and physicochemical properties of bis mercury ferric chloride tetra thiocyanate: A nonlinear optical crystal

Single crystal of bis mercury ferric chloride tetra thiocyanate [Hg2FeCl3(SCN)4; (MFCTC)] was grown from ethanol–water (3:1) mixed solvent using slow evaporation solvent technique (SEST) for the first time. The cell parameters of the grown crystal were confirmed by single crystal XRD. The coordination of transition metal ions with the SCN ligand is well-identified using FT-IR spectral analysis. The chemical composition of MFCTC was confirmed using CHNS elemental test. The ESR spectral profile of MFCTC was recorded from 298K to 110K, which strongly suggests the incorporation of Fe3+ ion and its environment with respect to SCN ligand. The HPLC chromatogram of MFCTC highlights the purity of the compound. The UV–Vis–NIR studies revealed the ultra violet cut-off wavelength of MFCTC in ethanol as 338nm. The dielectric constant and dielectric loss of the sample were studied as a function of frequency and temperature. The TGA–DTA and DSC thermal analysis show that the sample is thermally stable up to 234.31°C, which is comparatively far better than the thermal stability of Hg3CdCl2(SCN)6; (171.3°C) and other metal–organic coordination complex crystals such as CdHg(SCN)4 (198.5°C), Hg(N2H4CS)4Mn(SCN)4 (199.06°C) and Hg(N2H4CS)4Zn(SCN)4 (185°C). The SHG conversion efficiency of MFCTC is found to be higher than KDP.

Two birds with one stone: Self-assembly of metal–organic coordination complexes with discrete metallamacrocycle and 1D zigzag chain based on a flexible dicarboxylate ligand

To assemble metal–organic coordination complexes, a flexible dicarboxylate ligand, 2,2′-(4,6-dimethyl-5-nitro-1,3-phenylene)bis(methylene)-bis-(sulfanediyl)dibenzoic acid (H 2 L ), has been designed and synthesized. Using the flexible ligand to assemble with copper ions, a mixture of two metal–organic complexes, Cu 2 ( L ) 2 (py) 4 ·4dmso ( 1 ) and Cu 2 ( L ) 2 (py) 6 ·3dmso·py ( 2 ), has been generated by solvothermal technology in one glass tube. Through increasing the mole fraction of pyridine, the pure phase of complex 2 was obtained. Both complexes have been characterized by single-crystal X-ray diffraction, elemental analysis, and thermogravimetric analysis. Complex 1 is a discrete rectangular macrocycle. The guest solvents of dimethyl sulfoxide molecules were trapped in the cavity of rectangular metallmacrocycle, resulting in the formation of an infinite supramolecular metal–organic nanotube through van der Waals interactions between the guests and the host molecules. In complex 2 , the flexible ligand adopts a syn conformation to assemble with copper ions to form an infinite one-dimensional zigzag chain. The structures of the two complexes vary from discrete metallamacrocycle to 1D zigzag chain with the flexible ligands that are in the syn conformation and the two complexes were gotten in the same glass tube. Because of the existence of the guest molecular, the metal-organic supramolecular nanotubes were formed. ► Two new copper(II) coordination complexes based on a flexible dicarboxylate ligand were synthesized and characterized. ► The flexible ligands in the syn conformation assembled with Cu (II) generated discrete macrometallocycles and 1D zigzag chain subunits in the same glass tube. ► And through increased the mole fraction of pyridine, the pure phase of complex 2 was obtained. ► The metal-organic supramolecular nanotubes were formed because of the existence of the guest molecular.

Crystal Structure Diversities Based on 4,4′-(2,3,6,7-Tetramethoxyanthracene-9,10-diyl)dibenzoic Acid: From 2D Layer to 3D Net Framework

Five metal–organic coordination complexes with the formulas of {Mn(L)(H2O)2}n (1), {[Cd1.5L1.5(DEF)2]·2DEF}n (2), [Co1.5(L)1.5(H2O)]n (3), {[Co(L)(H2O)2]·4H2O}n (4), and {[Ni(L)(H2O)2]·4H2O}n (5), (H2LOMe = 4,4′-(2,3,6,7-tetramethoxyanthracene-9,10-diyl)dibenzoic acid) based on a new rigid dicarboxylate ligand were synthesized and structurally characterized. Structural analysis reveals that H2LOMe acts as multibidentate bridging linker to connect metal ions and possesses similar coordination modes with terephthalic acid. Complex 1 is a (44)-sql layer incorporating bidentate-bridging H2LOMe and infinite Mn(CO2)2 SBUs. Complexes 2 and 3 have similar 2D (36)-hxl layer topology structure based on bidentate-chelating/bridging H2LOMe ligand and trinuclear hourglass SBUs. Complexes 4 and 5 are isostructural and possess 3D open frameworks based on infinite M-(μ2-H2O) chain. From the viewpoint of crystal structure diversity and comparison, our results further demonstrate that the coordination mode of metal ions and ligand are the vital elements in determining the final crystal structure. Moreover, thermal stabilities of 1–5 and temperature-dependent photoluminescence behaviors of 1 and 2 are discussed.

Synthesis, crystal structure and computational chemistry research of a Zinc(II) complex: [Zn(Pt)(Biim)2

The title metal-organic coordination complex [Zn(pt)(Biim)2] (pt=phthalic acid, benzene-1,2-dicarboxylate, Biim=2,2'-biimidazole) 1 has been obtained by using hydrothermal synthesis and characterized by single-crystal X-ray diffraction. The complex crystallizes in monoclinic, space group P21/n with a = 8.5466(15) ?, b = 11.760(2) ?, c = 20.829(4) ?, ? = 95.56(2)?, V = 2083.5(6) ?3, Mr =497.78, Dc = 1.587 g/cm3, ?(MoK?) = 1.226 mm?1, F(000) = 1016, Z = 4, the final R = 0.0564 and wR = 0.1851 for 3656 observed reflections (I > 2?(I)). The elemental analysis, IR, TG and the theoretical calculation were also investigated.

Crystal Structures and Thermal Properties of Two Binuclear Cd(II) Supramolecular Complexes Based on Quinolinecarboxylate Ligand

Two novel binuclear metal-organic coordination complexes <TEX>$[Cd_2(L)_2(bpy)_2(H_2O)_2]{\cdot}6H_2O$</TEX> (1), <TEX>$[Cd_2(L)_2(phen)_2-(H_2O)_2]{\cdot}2H_2O$</TEX> (2) (where L = 2-methylquinoline-3,4-dicarboxylate dianion, bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline) have been synthesized under hydrothermal conditions and characterized by single crystal Xray diffraction, spectral method (IR), elemental analysis and thermal gravimetric analysis (TGA). Both 1 and 2 consist of two Cd(II) atoms bridged by two monoatomic bridging carboxylate groups from two L ligands, and the second carboxylate group of each L is monodentately coordinated to Cd(II), creating a sevenmembered chelating ring. The coordination at each metal nucleus is completed by a water molecule and a chelating bidentate molecule. The 3D structures of the complexes are stabilized by <TEX>${\pi}-{\pi}$</TEX> stacking interactions and hydrogen-bonds.

A series of new hybrid compounds constructed from Dawson-type phosphomolybdates and metal–organic coordination complexes

In this study, a series of compounds based on Dawson-type phosphomolybdates, H3(C6NO2H6)2[K(H2O)3(C6NO2H5)3][P2Mo18O62] ⋅ 5.5H2O (1), (C6NO2H6)6[Ln(H2O)7(C6NO2H5)2]2[P2Mo18O62]2·13.5H2O (Ln = Ce (2), La (3)) have been synthesized and characterized by elemental analysis, IR and UV-Vis spectroscopy methods, TG analysis, and single-crystal X-ray diffraction. Compound 1 consists of [P2Mo18O62]6− building units joined by potassium-pyridine-3-carboxylic acid complexes, resulting in a wavelike polyoxometalate (POM) chain, which further interacts with each other via intermolecular interactions to form a 3-D supramolecular channel framework containing guest water molecules. Compounds 2 and 3 possess a 3-D supramolecular framework with 1-D tunnel constructed from [P2Mo18O62]6− and mononuclear lanthanide coordination complex fragments. To the best of our knowledge, 1 not only represents the first example of 1-D hybrid assembly based on Dawson-type phosphomolybdate, but also the first hybrid compound constructed from Dawson-type POMs and alkali–metal coordination complex fragments.

A New 2D Coordination Polymer Material Based on 4d-4f Heterometallic Assembly

A new transition-lanthanide metal-organic framework coordination complex, namely [Ag2Dy(nic)4(H2O)4· ClO4· H2O]n (nic = nicotinate) (1) has been synthesized by the reaction of the 4d and 4f metal salts with heterocyclic ligand under mild condition and characterized by elemental analysis, IR and single-crystal X-ray diffraction. Compound 1 presents interesting 2D under heterometallic layer generated by the self-assembly of 1D chains of lanthanide-carboxylate with Ag(nic)2 subunits. Furthermore, the title compound displays an interesting 3D zeolite-like porous topology.

Synthesis, structures and electrochemical properties of two novel metal–organic coordination complexes based on trimesic acid (H 3BTC) and 2,5-bis(3-pyridyl)-1,3,4-oxadiazole (BPO)

Two novel metal–organic coordination complexes [Cu(HBTC)(BPO)]·H 2O ( 1) and [Co 3(BTC) 2(BPO) 3(H 2O) 2]·5.25H 2O ( 2), have been synthesized from hydrothermal reaction of metal chloride with the mixed ligands 1,3,5-benzenetricarboxylate (H 3BTC) and bent dipyridyl based ligand 2,5-bis(3-pyridyl)-1,3,4-oxadiazole (BPO), and structurally characterized by elemental analyses, IR, TG and single-crystal X-ray diffraction analysis. The results reveal that each dinuclear Cu II unit is bridged by two kinds of different ligands (H 3BTC and BPO) to form one-dimensional (1-D) chain structure in complex 1. The adjacent chains for 1 are further linked by π–π stacking interactions and hydrogen bonding interactions to form a three-dimensional (3-D) supramolecular framework. Complex 2 possesses a 3-D network composed of three different cobalt(II) centers [carboxylate-bridged dinuclear cobalt units and mononuclear cobalt ion] and bridging ligands BTC and BPO, which presents the first example of 3-D coordination polymer constructed from the BPO ligands simultaneously showing three different coordination modes. Moreover, the electrochemical behaviors of the two complexes bulk-modified carbon paste electrodes ( 1-CPE and 2-CPE) have been reported.

Anion-directed assembly of metal–organic coordination complexes from 1,3-imidazolidine-2-thione ligand and silver salts

Five novel silver (Ι) complexes with 1,3-imidazolidine-2-thione ligand formulated as [Ag 2(η 1-SC 3H 6N 2) 6]SO 4 ( 1), [Ag 2(μ 2-SC 3H 6N 2) 2(η 1-SC 3H 6N 2) 4](NO 3) 2 ( 2), [Ag(μ 2-SC 3H 6N 2)Br] n ( 3), [Ag 2(μ 2-SC 3H 6N 2) 3(CH 3COO) 2] n ( 4), [Ag(μ 2-SC 3H 6N 2)Cl] n ( 5) have been synthesized under similar conditions except for different anions and solvents. They are structurally characterized by elemental analysis, IR, TG and single crystal X-ray diffraction. Complex 1 is a binuclear complex, with SO 4 2− anions as the counteranions. Complex 2 is a molecular binuclear silver cluster, with NO 3 − anions as the counteranions. Complex 3 shows a novel 2D lamella structure constructed by the S atom of 1,3-imidazolidine-2-thione ligand and Br − anions, and exhibits 12-membered metallacyclic rings in its structure. Complex 4 is a novel 2D layered polymer with a graphite-like array of silver (I) ions, with CH 3COO − anion coordinated to silver(I) ions by O atom. Complex 5 shows a 3D diamond-like network structure constructed by the sulfur atom of 1,3-imidazolidine-2-thione ligand and Cl − anions.

Five Ag(Ι) metal–organic coordination complexes with dinuclear units: Synthesis and crystal structures

Five new Ag(Ι) metal–organic coordination complexes with dinuclear structure units, Ag 2( L 1 ) 2(NO 3) 2 ( 1), Ag 2( L 2 ) 3(ClO 4) 2 ( 2), Ag 2( L 2 ) 3(NO 3) 2 ( 3), [Ag 2( L 3 ) 3(BF 4) 2](H 2O) 0.25 ( 4) and [Ag 2( L 4 ) 2(CH 3OH) 2](ClO 4) 2 ( 5) were synthesized, using ligands L 1 ( N-1,3,4-thiadiazol-2-yl-propionamide), L 2 [ N-(5-methyl-1,3,4-thiadiazol-2-yl)-propionamide], L 3 ( N-1,3,4-thiadiazol-2-yl-benzamide) and L 4 [ N-(5-methyl-1,3,4-thiadiazol-2-yl)-benzamide] as building blocks. All complexes were structurally characterized by elemental analyses, IR spectroscopy and X-ray diffraction. Complexes 1– 5 have dinuclear structure units. Compounds 1 and 5 are centrosymmetric different from 2 to 4, in 2– 4 two distinct Ag(Ι) were observed in the independent crystallographic dinuclear unit. In 1, 4 and 5, ligands bridge two Ag(Ι) atoms to form an approximately planar binuclear structure containing six-membered ring (Ag–N–N–) 2. In complexes 1– 5, the Ag⋯Ag weak interactions were observed between the two non-bonding Ag(Ι) centers in the dinuclear unit and the Ag⋯Ag distance are in 3.150–3.481 Å.

Growth and characterization of pure and doped bis thiourea zinc acetate: Semiorganic nonlinear optical single crystals

Metal–organic coordination complex single crystals bis thiourea zinc acetate (BTZA) and Cd2+ doped BTZA have been synthesized and grown successfully by slow-cooling technique from their aqueous solutions. Single crystals of pure and Cd2+ doped BTZA with dimensions of 35×4×2mm3 and 10×5×6mm3, respectively were obtained with well defined morphology. The as grown single crystals are characterized by single crystal XRD studies and melting point measurements which reveal the incorporation of metallic dopants has not changed the structure of the parent crystal. The powder X-ray diffractogram of the grown crystals has been recorded and the various planes of reflection identified shows shift in the peak positions. The metal coordination with thiourea through sulphur in pure and Cd2+ doped BTZA were ascertained by FTIR studies and optical absorption study to identify the UV cut-off range. The presence of metals in pure and Cd2+ doped BTZA crystal lattice were confirmed by atomic absorption spectroscopy (AAS). The thermal decomposition of pure and Cd2+ doped BTZA crystals were investigated by thermo gravimetric analyses (TGA) and differential thermal analysis (DTA) indicate that doped crystals are more stable than pure crystals. The dielectric response of the crystals were studied in the frequency range 100Hz–5MHz at different temperatures and the results are discussed. Second harmonic generation (SHG) measurement confirms that the pure and Cd2+ doped BTZA have nonlinear optical (NLO) property. Laser damage threshold value of 12.44MW/cm2 has been determined using Q-switched Nd:YAG laser operating at 1064nm and with 8ns pulses in single shot mode for pure BTZA single crystal is reported for the first time.

Synthesis, structures of novel zinc and copper compounds based on pyridazino[3,2- c]1,2,4-triazole derivatives

Ligands 6-phenyl-3-(4′-pyridinyl) pyridazino[3,2- c]1,2,4-triazole ( L 1 ), 6-phenyl-3-(3′-pyridinyl) pyridazino[3,2- c]1,2,4-triazole ( L 2 ) and 3,6-diphenyl pyridazino[3,2- c]1,2,4-triazole ( L 3 ) have been designed and synthesized. Reactions of these ligands with Cu II, Cu I and Zn II, five new metal–organic coordination complexes were obtained. X-ray diffraction analyses show that complexes 1, 3 and 4 are mononuclear structure, 5 is trinuclear complex, while 2 possess 1D chain structure. Complexes 1, 3, 4 and 5 were further assembled into infinite 1D structure by weak interactions, while 2 possesses noticeable weak interaction between two Cu I atoms bridged by iodine [Cu I⋯Cu I = 2.6616(13) Å] and was extended into 2D sheet by π⋯π stacking interaction between adjacent chains. In addition, the steric hindrances of substituent probably weaken the coordination abilities of the pyridazine or triazole N donors.

Syntheses, structures and photoluminescence of a series of metal-organic complexes with 1,3,5-benzenetricarboxylate and pyrazino[2,3-f][1,10]-phenanthroline ligands

A series of new metal-organic coordination complexes, [Co2(HBTC)2(Pyphen)2(H2O)4]·4H2O (1), [Mn(HBTC)(Pyphen)(H2O)] (2), [Cd2(OH)(BTC)(Pyphen)2]·H2O (3), [Cu2(OH)(BTC)(Pyphen)] (4), and [Zn2(OH)(BTC)(Pyphen)] (5) were prepared through hydrothermal reactions of pyrazino[2,3-f][1,10]-phenanthroline (Pyphen) and 1,3,5-benzenetricarboxylic acid (H3BTC) with different metal salts. All these compounds were structurally determined by X-ray single-crystal diffraction. In the dinuclear Co(II) compound (1) π–π interactions exist between Pyphen and HBTC2− ligands, resulting in interesting 2D supramolecular layers. For complex (2), the Mn(II) centers are linked by HBTC2− ligands to form a 2D (4,4) coordination layer, and these layers are interdigitated in pairs. Polymer (3) also possesses a 2D network structure composed of the tetrametallic clusters [Cd4(µ2-OH)2], which is extended to 3D arrays through the π–π interactions between Pyphen ligands. The isostructural coordination polymers (4) and (5) show the same 3D framework structure. Solid-state luminescent spectra of the Cd(II) and Zn(II) complexes indicate intense fluorescent emissions.

An interesting fourfold interpenetrating network constructed by polyoxometalates and metal–organic coordination complexes: [formula omitted

A novel fourfold interpenetrating 3D network compound, [ Cu I 5 ( bpy ) 5 ( H 2 O ) 2 ] [ [ Cu II ( H 2 O ) 3 ] 2 Cu II [ P 4 Mo V 6 O 25 ( OH ) 6 ] 2 ] · H 3 O + · 2 H 2 O 1 (bpy = 4,4′-bipyridine), has been synthesized and characterized by elemental analyses, IR, TG analyses, and single-crystal X-ray diffraction. Compound 1 is built up of Cu[P 4Mo 6O 25(OH) 6] 2 clusters covalently linked by Cu-bpy coordination polymer chains to yield unusual two-dimensional layers, which are further connected together by metal coppers to produce an interesting fourfold interpenetrating 3D network structure. The crystal data for compounds 1: Triclinic, space group P 1 ¯ , a = 12.714(3) Å, b = 14.882(3) Å, c = 15.369(3) Å, α = 72.74(3)°, β = 72.12(3)°, γ = 65.62(3)°, V = 2471.9(9) Å 3, Z = 1.