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-pyridine...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.展开更多
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 ...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 ℃.展开更多
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 hydrotherm...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.展开更多
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＂-bi...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.展开更多
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). Crystallograph...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.展开更多
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...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.展开更多
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-r...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.展开更多
A novel one-dimensional coordination polymer, Catena-poly [bis(4-cyano-pyridyl) copper (Ⅱ) -di-thiocyanate], [Cu~Ⅱ-(cypy)_2(μN,s-SCN)_2] (cypy =4-cyano-pyridyl), was synthesized in a solution reaction of CuCNO_3)_2...A novel one-dimensional coordination polymer, Catena-poly [bis(4-cyano-pyridyl) copper (Ⅱ) -di-thiocyanate], [Cu~Ⅱ-(cypy)_2(μN,s-SCN)_2] (cypy =4-cyano-pyridyl), was synthesized in a solution reaction of CuCNO_3)_2·3H_2O, 4-cyano-pyridine andKSCN in mole ratio of 1:2:2 at room temperature. Its crystal structure was determined bysingle-crystal X-ray diffraction. The crystal belongs to monoclinic crystal system, space groupP2_1/c with cell parameters a = 1.0719(2), b = 1.8441(4), c = 0.9144(2) nm, β = 110.49(3)° and Z =4. A full-matrix least-squares refinement gave R_1 = 0.0393 and wR_2 = 0.0916 for 1554 reflectionshaving I > 2σ (Ⅰ). The crystal is thermally stable up to approximately 170℃.展开更多
A few copper? ions or groups have been designed and investigated for metal assisted self assembly. Reactions of these metal units with a number of linear bridging ligands have led to the production of some dinuclear c...A few copper? ions or groups have been designed and investigated for metal assisted self assembly. Reactions of these metal units with a number of linear bridging ligands have led to the production of some dinuclear copper? complexes and coordination polymers in which metal centers are all five coordinate in the configuration of a square pyramid or a triangular bipyramid.展开更多
The 1D-chain polymer of [Cu(Ⅱ)3L3(H2O)]n, (H2L=3-(3,5-dichloro-2-hydroxybenzylid-eneamino)propanoic acid) has been synthesized by reaction of 3,5-dichlorosalicylaldehyde, β-alamine and copper nitrate in ethanol solu...The 1D-chain polymer of [Cu(Ⅱ)3L3(H2O)]n, (H2L=3-(3,5-dichloro-2-hydroxybenzylid-eneamino)propanoic acid) has been synthesized by reaction of 3,5-dichlorosalicylaldehyde, β-alamine and copper nitrate in ethanol solution. The crystal structure was determined by X-ray diffraction method. The crystal structure belongs to mono-clinic system with space group C2/c and cell parameters: a=3.853 7(3) nm, b=0.777 38(18) nm, c=2.656 36(2) nm, β=116.924(2)° and V=7.095 4(17) nm3, Mr=998.85, Z=8, Dc=1.870 g·cm-3 and F(000)=3 992. The two Cu(Ⅱ) atoms are coordinated with four atoms from Schiff base, and another one is coordinated with five atoms. The square bridging links three metal centers through a novel μ-4,4,5 coordination model, which is further assembled into 1D chain coordination polymer. The 1D chain is further constructed a 3D network by strong O-H…O and C-H…O hydrogen bonds. The coordination polymer presents a good thermal stable property through the thermal analysis.展开更多
Coordination polymers,consisting of metal,anion and organic ligands,have attracted much attention.The structure of coordination polymers is affected by various factors.To investigate the effects of anion,syntheses and...Coordination polymers,consisting of metal,anion and organic ligands,have attracted much attention.The structure of coordination polymers is affected by various factors.To investigate the effects of anion,syntheses and structures of four Cu(II)complexes,namely[(Cu LCl)(PF)](1),[(Cu LCl)(ClO)](2),[(Cu LCl)?CHOH](3)and Cu LCl(4),are reported based on a flexible ligand,1,3-bis(2-pyridylmethyl)imidazolium(L).The ligand is accommodative to kinds of anions,and forms 1-D chains generally upon reaction with Cu(II)salts.The effect is measured by the conformational variation through the dihedral angles between different aromatic rings of the ligand.In order to further investigate the effect of anion,a protonated sample of L,namely,LH(ClO)?HO(5)is also synthesized and structurally characterized,showing an intriguing hydrogen bonded helix.展开更多
One-dimensional cyanide-bridged bimetallic coordination polymer [CuL(H 2O) 2] n [(CuL)·(μ-CN) 2Fe(CN) 4] 2n ·(H 2O) 2n was synthesized and structurally characterized. The coordination polymer crystallizes i...One-dimensional cyanide-bridged bimetallic coordination polymer [CuL(H 2O) 2] n [(CuL)·(μ-CN) 2Fe(CN) 4] 2n ·(H 2O) 2n was synthesized and structurally characterized. The coordination polymer crystallizes in a monoclinic system of the space group C2/c with a=2.983 1(5) nm, b=1.527 4(3) nm, c= 1.725 3(4) nm, β=107.68(2)°, V=7.490(3) nm3, Z=8, D c=1.382 g/cm3, F(000)=3 260, R=0.059 3, wR 2=0.132 3, S=0.885. The one-dimensional zigzag chain extents through Cu—CN—Fe—CN—Cu linkages. The adjacent two polymer chains are linked by the O—H……NC hydrogen bonding between [CuL(H 2O) 2] 2+ and [Fe(CN) 6] 3- ions to form hydrophilic channels in which water molecules are included.展开更多
基金Supported by the Natural Science Foundation of Hunan Province(2019JJ60021,2019JJ50013)the Scientific Research Found of Education Department of Hunan Province(17A049)Industry and Research Key Project of Hengyang City(2018KJ016,HXKJ201942,2017KJ193)
文摘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.
文摘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 ℃.
基金supported by the National Natural Science Foundation of China(Nos.21271098 and 21371089)Science and Technology Research Key Project of the Education Department of Henan Province(No.14B150034)
文摘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.
基金supported by the National Natural Science Foundation of China(No.21071099)
文摘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.
基金Supported by the National Natural Science Foundation of China(No.21607051)Institute Foundation of Siping City(No.2017057)the Science and Technology Research Projects of the Education Committee of Jilin Province(No.JJKH20180779KJ)
文摘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.
基金supported by the National Natural Science Foundation of China(21001025)the Natural Science Foundation of Fujian Province(2010J05017)Provincial Education Department of Fujian(JA12070)
文摘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.
基金This work was supported by the National Natural Science Foundation of China (No. 20331010 ) and Natural Science Foundation of Tianjin (No. 033602011)
文摘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.
文摘A novel one-dimensional coordination polymer, Catena-poly [bis(4-cyano-pyridyl) copper (Ⅱ) -di-thiocyanate], [Cu~Ⅱ-(cypy)_2(μN,s-SCN)_2] (cypy =4-cyano-pyridyl), was synthesized in a solution reaction of CuCNO_3)_2·3H_2O, 4-cyano-pyridine andKSCN in mole ratio of 1:2:2 at room temperature. Its crystal structure was determined bysingle-crystal X-ray diffraction. The crystal belongs to monoclinic crystal system, space groupP2_1/c with cell parameters a = 1.0719(2), b = 1.8441(4), c = 0.9144(2) nm, β = 110.49(3)° and Z =4. A full-matrix least-squares refinement gave R_1 = 0.0393 and wR_2 = 0.0916 for 1554 reflectionshaving I > 2σ (Ⅰ). The crystal is thermally stable up to approximately 170℃.
文摘A few copper? ions or groups have been designed and investigated for metal assisted self assembly. Reactions of these metal units with a number of linear bridging ligands have led to the production of some dinuclear copper? complexes and coordination polymers in which metal centers are all five coordinate in the configuration of a square pyramid or a triangular bipyramid.
文摘The 1D-chain polymer of [Cu(Ⅱ)3L3(H2O)]n, (H2L=3-(3,5-dichloro-2-hydroxybenzylid-eneamino)propanoic acid) has been synthesized by reaction of 3,5-dichlorosalicylaldehyde, β-alamine and copper nitrate in ethanol solution. The crystal structure was determined by X-ray diffraction method. The crystal structure belongs to mono-clinic system with space group C2/c and cell parameters: a=3.853 7(3) nm, b=0.777 38(18) nm, c=2.656 36(2) nm, β=116.924(2)° and V=7.095 4(17) nm3, Mr=998.85, Z=8, Dc=1.870 g·cm-3 and F(000)=3 992. The two Cu(Ⅱ) atoms are coordinated with four atoms from Schiff base, and another one is coordinated with five atoms. The square bridging links three metal centers through a novel μ-4,4,5 coordination model, which is further assembled into 1D chain coordination polymer. The 1D chain is further constructed a 3D network by strong O-H…O and C-H…O hydrogen bonds. The coordination polymer presents a good thermal stable property through the thermal analysis.
基金supported by Thousand Talents Program of ChinaNational Natural Science Foundation of China(No.21101170 and 21573139)+1 种基金Fundamental Research Funds for the Central UniversitiesResearch Funds of Renmin University of China
文摘Coordination polymers,consisting of metal,anion and organic ligands,have attracted much attention.The structure of coordination polymers is affected by various factors.To investigate the effects of anion,syntheses and structures of four Cu(II)complexes,namely[(Cu LCl)(PF)](1),[(Cu LCl)(ClO)](2),[(Cu LCl)?CHOH](3)and Cu LCl(4),are reported based on a flexible ligand,1,3-bis(2-pyridylmethyl)imidazolium(L).The ligand is accommodative to kinds of anions,and forms 1-D chains generally upon reaction with Cu(II)salts.The effect is measured by the conformational variation through the dihedral angles between different aromatic rings of the ligand.In order to further investigate the effect of anion,a protonated sample of L,namely,LH(ClO)?HO(5)is also synthesized and structurally characterized,showing an intriguing hydrogen bonded helix.
文摘One-dimensional cyanide-bridged bimetallic coordination polymer [CuL(H 2O) 2] n [(CuL)·(μ-CN) 2Fe(CN) 4] 2n ·(H 2O) 2n was synthesized and structurally characterized. The coordination polymer crystallizes in a monoclinic system of the space group C2/c with a=2.983 1(5) nm, b=1.527 4(3) nm, c= 1.725 3(4) nm, β=107.68(2)°, V=7.490(3) nm3, Z=8, D c=1.382 g/cm3, F(000)=3 260, R=0.059 3, wR 2=0.132 3, S=0.885. The one-dimensional zigzag chain extents through Cu—CN—Fe—CN—Cu linkages. The adjacent two polymer chains are linked by the O—H……NC hydrogen bonding between [CuL(H 2O) 2] 2+ and [Fe(CN) 6] 3- ions to form hydrophilic channels in which water molecules are included.
