Temperature-controlled Hydrothermal Synthesis of Copper(Ⅰ or Ⅱ) Coordination Polymers via a Variety of Copper Coordination Modes

Two 1D coordination polymers Cu2I（C6N3H4）2（1） and CuⅡ（C6N3H4）2·H2O（2） based on benzotriazole（Bta） were hydrothermally synthesized by controlling the crystallization temperature.Single-crystal X-ray diffraction（XRD） analyses reveal that compound 1 is a 1D tubular structure constructed from two types of 1D chains {―Cu―N=N―N―} n,where the Cu（I） ions adopt linear,triangular,and tetrahedral coordination modes to connect two types of Bta ligands via π-π interaction inside the tubular-like chain.For compound 2,the Cu（Ⅱ） ions assume a quadrilateral coordination mode linking to the Bta ligands to give 1D straight chains,which stacks through π-π interactions to construct a 2D layer structure.Further characterizations including elemental analyses,infrared IR spectra,thermogravimetric（TG） analyses and luminescence properties have been done.

Crystal Structure, Electrochemical and Fluorescent Properties of a New Copper(Ⅱ) Coordination Polymer with 2,3-Pyridinedi-carboxylic Acid

A new copper(Ⅱ)coordination polymer[Cu5(Hpt)5(H2O)2(2,3-PCA)2]n·12nH2O(1)has been successfully synthesized under hydrothermal conditions with copper hydroxide,3-(pyridin-2-yl)-1,2,4-triazole(Hpt)and 2,3-pyridinedi-carboxylic acid(2,3-PCA).The structure of the title compound was determined by X-ray diffraction analyses,elemental analyses and IR spectrum.The architecture of 1 consists of one-dimensional sandwich-like chains which are connected by extensive hydrogen bonding interactions.The solid-state photoluminescence displays an obvious emission band at 384 nm upon excitation at 340 nm.In addition,electrochemistry property has also been studied.

Crystal Structure, Thermal Behavior and Luminescence of a New Copper Coordination Polymer Constructed with 4-(Carboxymethoxy)-benzoic Acid

A new Cu(Ⅱ) coordination polymer, [Cu(L1)(L2)](1), was synthesized under hydrothermal conditions(H_2L1 = 4-(carboxymethoxy)benzoic acid, L2 = 2-(4-fluorophenyl)-1 H-imidazo[4,5-f][1,10]phenanthroline). Crystallographic data for 1: triclinic, space group P1 with a = 9.750(5), b = 10.148(5), c = 12.869(5) ?, α = 104.904(5), β = 102.133(5), γ = 95.219(5)°, V = 1188.7(10) ?~3, Z = 2, C_(28)H_(17)FN_4O_5Cu, Mr = 572.01, D_c = 1.598 g/cm^3, F(000) = 582, μ(MoKa) = 0.977 mm^(-1), R = 0.0474 and w R = 0.1144. The TGA behaviors and luminescence of 1 have been studied in detail. The L1 dianions link neighboring Cu(Ⅱ) atoms in a bis-chelating mode, yielding a one-dimensional chain structure along the b axis. The L2 ligands are attached on one side of the chain through chelating the Cu(Ⅱ) atoms, and are stacked with those of an adjacent chain through π-π interactions, yielding a layer structure. Additionally, the N–H???O hydrogen bonds further stabilize the structure of 1.

Hydrothermal Synthesis, Crystal Structure and Properties of a New Copper Coordination Polymer [Cu2I（C7H5N4）2]n with 3-（Pyridin-2-yl）-1,2,4-triazole) Ligand

A new copper coordination polymer[Cu2I(C7H5N4)2]n(1)with the 3-(pyridin-2-yl)-1,2,4-triazole(Hpt)and copper iodide was synthesized.It crystallizes in the triclinic space group P1 with a=8.6380(9),b=9.2434(9),c=11.8588(12)A,α=99.5890(10)o,β=109.0990(10)o,γ=105.2800(10)o,V=829.25(15)A^3,Dc=2.180 g/cm3,Z=2,F(000)=522,GOOF=1.046,the final R=0.0245 and wR=0.0598.The crystal structure shows that two copper ions are bridged by twoμ2-η1:η0-3-(pyridin-2-yl)-1,2,4-triazole anions and two iodide ions.The coordination environments of the Cu ion are Cu(1)N5 and Cu(2)N2I2,giving distorted square pyramidal geometry and trigon pyramid geometry.The magnetic and fluorescent properties of 1 were studied.

Synthesis,Crystal Structure and Thermal Stability Properties of a Binuclear Copper(Ⅱ) Coordination Polymer {[Cu_2(4,4'-bipy)_2(o-ABA)_4(H_2O)_2][(H_2O)_2]}_n

One-dimensional chain copper（Ⅱ） coordination polymer has been synthesized and characterized in the solvent mixture of water and alcohol with o-acetamidobenzoic acid,4,4＇-bipyridine and copper perchlorate.It is of tetragonal,space group P41212 with a=1.57756（10）,b= 1.57756（10）,c=2.1438（3）nm,V=5.3352（8） nm^3,Dc=1.524 g/cm^3,Z=4,F（000）=2536,R= 0.0479 and wR=0.0979.The crystal structure shows two coordination modes.The copper（1） is coordinated with two nitrogen atoms of one 4,4＇-bipyridine molecule and two oxygen atoms from two o-acetamidobenzoic acid molecules,forming a distorted tetrahedral coordination geometry; the copper（2） is coordinated with two nitrogen atoms of one 4,4＇-bipyridine molecule,four oxygen atoms from two o-acetamidobenzoic acid molecules and two water molecules,generating a distorted octahedral coordination geometry.The result of TG analysis shows that the title complex is stable below 180.0 ℃.

Synthesis, Crystal Structure, Thermal Stability and Solid UV-Vis Absorption Spectra of One New Copper(Ⅱ) Coordination Polymer

A new coordination polymer [Cu2(OH)(nbta)(tib)(H2 O)2]n(1, H3 nbta = 5-nitro-1,2,3-benzenetricarboxylic acid, tib = 1-(4 H-1,2,4-triazol-4-yl)-4-(imidazol-1-yl)benzene) constructed from dimeric Cu(Ⅱ) units has been synthesized under hydrothermal conditions and structurally characterized by single-crystal X-ray diffraction analysis. The compound crystallizes in monoclinic system, space group I2/c, with a = 17.8474(9), b = 11.7588(6), c = 21.9221(11) ?, β = 104.419(5)°, V = 4455.7(4) ?3 and Z = 8. Compound 1 is a three-dimensional structure constructed from dimeric Cu(Ⅱ) units and presents a 2-nodal(3,5)-connected net. Moreover, the thermal stability and solid UV-Vis absorption spectra have been investigated.

In Situ Synthesis, Structural Characterization and Catalytic Properties of a 2D Cu(Ⅰ)-cyanide Coordination Polymer

A new Cu(Ⅰ) coordination polymer(CP) formulated as [Cu2(L)(CN)2]n(1, L =1,1′-bis(5,6-dimethylbenzimidazole)methane) was synthesized, in which the cyanide anions were generated in situ by the cleavage of C–C bond of acetonitrile under hydrothermal conditions. CP 1 was characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction. It crystallizes in the orthorhombic system, Pccn space group, with a = 10.314(3), b = 20.966(7), c =9.432(3)?, V = 2039.5(11)?3, Z = 4, C21 H20 Cu2 N6, Mr = 483.51, Dc = 1.575 g×cm^-3,μ= 2.105 mm-1 and F(000)= 984, the final R = 0.0608 and wR = 0.1942 for 1226 observed reflections with Ⅰ> 2s(Ⅰ)for the CP 1. The CP 1 possesses a 2D {63} layer structure which is composed of Cu(Ⅰ) centers bridged by L and CN– ligands. The thermal stability and luminescence properties of CP 1 are discussed in detail. The complex also displays a remarkable activity for the degradation of methyl orange by hydrogen peroxide in a Fenton-like process.

Synthesis, Crystal Structure and Antitumor Activity of a Na(Ⅰ) Coordination Polymer Based on 2-Propyl-4,5-imidazoledicarboxylic Acid and 1,10-Phenanthroline Ligands

A new Na(I) coordination polymer,[Na2(Hpimdc)(H2 pimdc)(phen)2]n(1), has been synthesized by the reaction of NaOH with 2-propyl-4,5-imidazoledicarboxylic acid(H3 pimdc)and 1,10-phenanthroline(phen). The Na(I) coordination polymer 1 was characterized by single-crystal X-ray diffraction analysis and elemental analysis. In 1, the bridged ligand H3 pimdc adopts two modes(singly deprotonated and doubly deprotonated) to coordinate with the Na(I) ion.The Na(1) ion is six-coordinated with three N atoms from a phen ligand and a H2 pimdc ligand,three O atoms from a Hpimdc ligand and two other different H2 pimdc ligands. The Na(2) ion is also six-coordinated with three N atoms from a phen ligand and a Hpimdc ligand, three O atoms from a H2 pimdc ligand and other two different Hpimdc ligands. Complex 1 exhibits a 1 D chain structure built up by μ-H2 pimdc-and μ-Hpimdc2-ligands. The antitumor activities of complex 1 against human SGC7901, A549 and H08910 cells have been tested.

A New Copper Coordination Polymer with Magnetic Property Based on 3-(1,2,4-Triazol-1-yl)benzoic Acid

A copper coordination polymer, namely [CuL2（H2O）2]·H2O 1（HL = 3-（1,2,4-triazol-1-yl）benzoic acid） has been synthesized by the hydrothermal reaction under 140 ℃. The structure of 1 was characterized by single-crystal X-ray diffraction analysis, elemental analyses, powder X-ray diffraction, IR spectroscopy, and thermogravimetric analysis. Single-crystal X-ray diffraction analysis reveals that 1 crystallizes in P21/n space group with a = 12.374（5）, b = 12.730（5）, c = 12.561（5） A°, β = 91.105（9）o, V = 1978.2（14）A°^3, Z = 4, Dc = 1.618 g/cm^3, μ = 1.160 mm^-1, F（000） = 964, the final R = 0.0449 and w R = 0.1443 with I 〉 2σ（I）. Magnetic measurements show that 1 exhibits antiferromagnetic interactions by the analysis of magnetic test data.

Synthesis, Structure and Magnetic Property of a New Three-dimensional Copper(Ⅱ) Coordination Polymer Constructed from 5-Tert-butyl Isophthalic Acid and N-donor Ligand

A new 3D copper（Ⅱ） coordination polymer, {[Cu_2（tbip）_2（1,3,5-tib）]×2H_2O}n（1, H_2 tbip = 5-tert-butyl isophthalic acid, 1,3,5-tib = 1,3,5-tris（1-imidazolyl）benzene）, has been synthesized by hydrothermal reaction of Cu（OAc）_2·4H_2O, H_2 tbip and 1,3,5-tib. It has been structurally characterized by element analysis, IR and magnetic measurement. X-ray single-crystal analysis was carried out for 1, which crystallizes in the triclinic system, space group P1 with a = 7.822（3）, b = 15.854（6）, c = 17.553（6） ？, a = 113.033（4）, β = 90.694（4）, g = 101.006（4）°, V = 1957.3（12） ？~3, Z = 1, D_c = 1.493 g/cm^3, M_r = 1759.70, F（000） = 908, R = 0.0721 and w R = 0.1978 with I 〉 2s（I）. The single-crystal X-ray diffraction studies reveal that compound 1 exhibits 2D [Cu（tbip）] layers which are further pillared by 1,3,5-tib ancillary ligand with terminal tridentate coordination mode to generate the final 3D structure. Magnetic susceptibility data for 1 have been measured in the range of 2~300 K. There are antiferromagnetic interactions between copper ions of the compound.

A One-dimensional Coordination Polymer of Copper(Ⅱ) and Bis(4,6-dimethyl-2-pyrimidinethiolato)methane

Reaction of bis（4,6-dimethyl-2-pyrimidinethiolato）methane（bpytm） with CuCl2·4H2O in a mixed methanol/dichloromethane solution gave a one-dimensional coordina-tion polymer [CuCl2（μ-bpytm）]n which was characterized by single-crystal X-ray diffraction.It crystallizes in monoclinic,space group P21/c with a=16.9433（5）,b=13.6986（4）,c=7.8434（2）,β=100.371（2）°,V=1790.71（9）3,Z=4,Mr=426.86,Dc=1.583 g/cm3,μ（MoKα）=1.751mm-1,F（000）=868,S=1.025,the final R=0.0399 and wR=0.0924 for 2538 observed reflections with Ⅰ〉2σ（I） and 206 variables. The neutral coordination polymer is constructed by the bidentate thioether ligands to link adjacent copper atoms. Each copper atom is bridged by two adjacent nitrogen atoms of bpytm ligands and terminally bonded by two chloride atoms to form a squareplanar coordination geometry. The average Cu-N and Cu-CI bond lengths are 2.025（2） and 2.234（1） A, respectively.

A 2D Brickwall-like Copper(Ⅱ) Coordination Polymer Based on Phenyliminodiacetate and 4,4?-Bipyridine: Synthesis,Crystal Structure and Magnetic Property

A novel copper（II） coordination polymer of {[Cu3L2（4,4＂-bipy）4]（CIO4）2＂20H20}, （1） was synthesized by the reaction of H2L （C6HsN（CH2COOH）2, phenyliminodiacetic acid）, CuSO4.5H20, NaCIO4.H20 and 4,4＂-bipy （4,4＂-bipyridine） in water/methanol, followed by slow evaporating at room temperature. The compound was characterized by elemental analysis （EA）, infrared spectroscopy （IR）, thermogravimetric analysis （TGA） and single-crystal/powder X-ray diffraction. The result of single-crystal X-ray diffraction analysis reveals that 1 crystallizes in the monoclinic crystal system with C2/c space group, a = 2.9974（4）, b = 1.7270（2）, c = 2.0007（3） nm, fl = 128.793（2）°, V= 8.0722（19） nm3, Z = 4, Dc = 1.472 g.cm-3,/a = 0.942 mm-1, F（000） = 3716, R= 0.0487 and wR = 0.1204 （I 〉 20（/））. The basic structural unit of 1 is a trinuclear cluster unit of [Cu3L2]2＋, which is constructed by two #2-L2- ligands bridging and chelating three Cu（Ⅱ） ions. These [Cu3L2]2＋ units are connected with each other by 4,4＂-bipy ligands to generate a 2D cation brickwall-like network of [Cu3L2（4,4＂-bipy）4]n2n＋. These adjacent 2D cation layers are further stacked in a staggered fashion via interlayer stacking interactions to form a 3D supramolecular structure with 1D open square channels, in which the C104- counter anions and lattice water molecules are filled. Furthermore, the magnetic property of 1 was also investigated.

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.

Synthesis and Crystal Structure of a 1D Chained Coordination Polymer Containing One-dimensional Egg-like Channels:{[Cu_2(C_2O_4)_2(inta)_4](inta)}_n (inta=Isonicotinamide)

A new one-dimensional copper coordination polymer chain has been prepared and fully characterized by single-crystal X-ray diffraction, elemental analyses and IR spectroscopy. The compound { [Cu2（C2O4）2（inta）4]（inta）}n 1 crystallizes in the triclinic system, space group P1, with a = 8.4722（5）, b = 10.9825（6）, c = 11.6128（6）A, α= 104.8050（10）,β = 102.5740（10）, γ= 109.6890（10）°, V= 927.18（9） A3, Mr = 929.79, Z = 1, Dc = 1.665 g/cm^3, F（000） = 475, μ = 1.231 mm^-1, R = 0.0453 and wR = 0.1185 for 3290 observed reflections （Ⅰ 〉 2σ（Ⅰ））. Of the compound, the Cu center is octahedrally coordinated with oxalate acting as a tetra-dentate ligand coordinated to the copper atom and each inta serving as a terminal ligand by employing only one N-donor to coordinate with the Cu center. An infinite {Cu2（C2O4）2}∞ chain is formed along the c axis. Furthermore, the 1D chains are held together via extensive hydrogen-bonding interactions to generate a three-dimensional network with 1D channels （ca. 5.491A×11.507A） where inta molecules are filled.

Synthesis and Characterization of a Novel 3D Coordination Polymer Based on Cu(II) Cations and Mellitic Acid

A new mellitate complex [Cu3（μ2-mellitate）（μ2-H2O）（H2O）2·H2O]n 1 has been synthesized by the reaction of mellitic acid and Cu（CH3COO）2·H2O in the presence of base. Crystallographic data for 1： C12H8O16Cu3, Mr = 598.80, orthorhombic, Pbcn, a = 8.4378（6）, b = 10.0396（7）, c = 17.6799（12）A, V = 1497.70（18）A^3, Z = 4, De = 2.656 g/cm^3, μ = 4.327 mm^-1, F（000） = 1180, R = 0.0431 and wR = 0.0964 for 1075 observed reflections （I 〉 2σ（I））. X-ray crystal structural analysis revealed that the mellitate anions behave as the bridging ligands and link eight copper atoms repeatedly to form a novel three-dimensional metal-organic coordination polymer with two different rhombic tunnels in the solid-state structure.

Syntheses, Structures and Properties of Two 2D Coordination Polymers from 5-(Pyridin-2-yl-methyl)aminoisophthalate

Hydrothermal reactions of 5-（pyridin-2-yl-methyl）aminoisophthalic acid（H2paip） with Mn（OAc）2·4H2O and Cu（NO3）2·3H2O produced two 2D complexes, [Mn（paip）]n·nH2O（1） and [Cu（paip）（H2O）]n（2）. In complex 1, paip serves as a μ4-bridge, and its two carboxylate groups in μ2,η2-bridging and chelating modes connect Mn（Ⅱ） into 1D chains, which are further extended into a 2D layer through coordination of two chelating nitrogen atoms. However, paip in complex 2 acts as a μ3-bridge to link Cu（Ⅱ） into a 2D layer, in which two carboxylate groups function in a monodentate mode, and hydrogen bonds between the coordinated water and carboxylate oxygen atoms further extend the 2D layers into a 3D supramolecular network. The frameworks of complexes 1 and 2 are stable up to 470 and 250 ℃, respectively. Magnetic measurement shows that complex 2 possesses a weak antiferromagnetic interaction.

Synthesis and Crystal Structure of a 1D Coordination Polymer:{[Cu(HSSA)(py)_3]·H_2O}_n (H_3SSA =5-Sulfosalicylic Acid,py = Pyridine)

The title compound [Cu（HSSA）（py）3H2O]n （H3SSA = 5-sulfosalicylic acid, py = pyridine） I has been synthesized and structurally determined by single-crystal X-ray diffraction. I was further characterized by elemental analyses, thermogravimetric analyses, IR and UV-visible spectroscopy. The crystal belongs to the monoclinic system, space group P21/c with a = 9.4564（10）, b = 18.2679（19）, c = 15.7284（12） A,β= 126.045（4）°, V= 2196.9（4）A^3, Z= 4, Dc = 1.618 g/cm^3, Mr = 535.02,μ = 1.141 mm^-1, F（000） = 1100, 2（MoKα） = 0.71073 A, the final R = 0.0429 and wR = 0.1044 for all observed reflections. In the structure, every two Cu（II） atoms are bridged by a bivalent 5-sulfosalicylic anion to form a 1D chain-like coordination polymer. Lattice waters between chains link them to form 2D layers which are further linked by C-H…O hydrogen bonds to form a three-dimensional supramolecular network.

Crystal Structure and Thermal Stability Properties of a New 1D Chain Cu(Ⅱ)Coordination Polymer with2,3-Pyridinedicarboxylic Acid as the Ligand

A new 1D chain copper coordination polymer [CuE（H2L）2（C10HsN2）（HEO）2]n＇3n（H20） with 2,3-pyridinedi carboxylic acid （H2L） and 2,2＇-bipyridine （2,2＇-bipy） as ligands has been synthesized in the mixed ethanol and water solvents. Crystal data for this complex are as follows： monoclinic, space group P2Jc, a = 7.7713（7）, b = 27.478（3）, c = 13.2621（13）/1,, fl = 100.6940（10）, V= 2782.8（5） A3, Dc = 1.722 g/cm3, Z = 4, p = 1.61 mm-1, F（000） = 1472, the final R = 0.0363 and wR = 0.0933. In the crystal structure, the whole molecule consists of two cooper ions, two H2L, one 2,2＂-bipy molecule and six water molecules. Each central copper ion is coordinated with three oxygen atoms from two H2L and one water molecule, two nitrogen atoms from one 2,2＇-bipy molecule and two H2L, giving a distorted tetragonal pyramidal geometry. Thermal stability properties of the complex were investigated.

Synthesis,Structure and Luminescent Properties of Polymeric Copper(Ⅰ) Halide Complexes Bearing Phosphine and N-donor Bridging Ligands

Three polymeric copper（Ⅰ） halide complexes beating phosphine and N-donor bridging ligands, [（PPh3）2Cu2（μ-Br）2（μ-4,4＇-bipy）]∞ 1 （bipy = bipyridine）, [（PPh3）2Cu2（μ-Br）2（μ- bpe）]∞ 2 （bpe = trans-1,2-bis（4-pyridyl）ethene） and [（PPh3）2Cu2（μ-Cl）2（μ-bpe）]∞ 3, were synthesized by the multilayer diffusion method, and the structures were refined by single-crystal X-ray diffraction. Complex 1 crystallizes in triclinic, space group P1^- with a = 9.122（3）, b = 9.322（3）, c = 13.201（4） A, α = 106.440（4）, β= 105.965（5）, γ= 94.167（5）°, V = 1021.3（6） A^3, Mr= 967.62, Z = 1, De= 1.573 g/cm^3, F（000） = 486, μ = 3.111 mm^-1, the final R = 0.0383 and ωR = 0.0960 for 2792 observed reflections （I 〉 2σ（I））. Complex 2 crystallizes in triclinic, space group P1^- with a = 9.420（3）, b = 10.209（4）, c = 12.407（4） A, α = 104.136（6）, β = 108.132（5）, γ= 95.338（6）°, V = 1081.0（7） A^3, Mr= 496.83, Z = 2, Dc= 1.526 g/cm^3, F（000） = 500, μ = 2.941 mm^-1, the final R = 0.0445 and ωR = 0.1117 for 3251 observed reflections （I 〉 2σ（I））. Complex 3 crystallizes in triclinic, space group P1^- with a = 8.32（1）, b = 11.53（2）, c = 13.94（3） A, α = 109.57（3）, β= 93.85（3）, γ= 97.28（3）°, V= 1242（4） A^3, Mr= 1074.59, Z = 1, Dc = 1.436 g/cm^3, F（000） = 548, μ = 1.279 mm^-1, the final R = 0.0786 and ωR = 0.1586 for 2266 observed reflections （I 〉 2σ（I））. The complexes exhibit intensive solid-state photoluminescence tentatively assigned to an admixture of triplet intraligand （IL） and metal-to-ligand charge-transfer （MLCT） excited state.

Synthesis and Crystal Structure of a 1-D Coordination Polymer {[Cu(NIT4py)_2(ip)]·6H_2O}_n

A new complex { [Cu（NIT4py）2（ip）]·6H2O }, （NIT4py=2-（4＂-pyridinyl）-4,4,5,5-tetra methylimidazoline-1-oxyl-3-oxide and ip = isophthalate dianion） has been synthesized and structurally characterized by X-ray diffraction. It crystallizes in orthorhombic, space group Cmcm with a = 25.161（3）, b =10.045（1）, c = 15.450（2） A°, C32H48N6O14CU, Mr = 804.30, V= 3904.8（8） ,A°^3, Z = 4, De = 1.368 g/cm^3, μ（MoKa） = 0.630 mm^-1, F（000） = 1692, the final R = 0.0326 and wR = 0.0787 for 1843 independent reflections with Rint = 0.0372. Each Cu（Ⅱ） ion is four-coordinated by two carboxylate oxygen atoms and two pyridyl-N atoms from NIT4py radicals to furnish a rhombus geometry. The central Cu（Ⅱ） ion is located at an inversion center and a crystallographic two-fold axis. Each isophthalate dianion binds two Cu（Ⅱ） ions in bis-monodentate mode, leading to a 1-D chain, a＇ these 1-D chains are further linked into a 2-D network via hydrogen-bonding interactions.