A new cobalt（II） complex [Co（NO2-salen）2]·1.5H2O containing mono acetalization Schiff base ligand（NO2-salen = N-5-nitro-salicylideneamino ethanato） has been prepared through one-pot template condensation, a...A new cobalt（II） complex [Co（NO2-salen）2]·1.5H2O containing mono acetalization Schiff base ligand（NO2-salen = N-5-nitro-salicylideneamino ethanato） has been prepared through one-pot template condensation, and has been structurally characterized by elemental analysis, IR spectra and X-ray diffraction. It is formulated as C18H23CoN6O7.5, crystallizes in the hexagonal system, space group of R-3c with α = 25.895（18）, b = 25.895（18）, c = 35.075（6）, γ = 120o, V = 20368（3） and Z = 36. The ligand of 5-nitrosalicylaldehyde-ethylene-diamine takes unusual mono asymmetry mode. The Co（II） ion exhibits a coordination number of six, and assumes a distorted octahedral geometry with a N2O4 donor set. The neutral monomeric units of [Co（NO2-salen）2]·1.5H2O are linked into a one-dimensional（1D） structure via the intermolecular hydrogen bonds and weak π-π stacking interactions. Cyclic-voltammetry measurement reveals the oxidation and reduction processes for the complex are irreversible in nature.展开更多
Reaction of 3,5-pyridine-dicarboxylic acid（3,5-PydcH2） with iron salt in hydrothermal condition results in the formation of a three-dimensional self-assembly network formulated as [C14H14Fe2N2O12]n,and it has been s...Reaction of 3,5-pyridine-dicarboxylic acid（3,5-PydcH2） with iron salt in hydrothermal condition results in the formation of a three-dimensional self-assembly network formulated as [C14H14Fe2N2O12]n,and it has been structurally characterized by elemental analysis,IR spectra and X-ray diffraction.It crystallizes in the monoclinic system,space group C2/c with a=9.9633（15）,b=12.0942（18）,c=7.4297（11）A and β=105.822o.The units of Fe2（pydc）2·2H2O are linked into a one-dimensional structure via the chelate carboxylate groups from the 3,5-pyridine-dicarboxylate.The interlayer hydrogen bonding interactions result in a three-dimensional supramolecular architecture.In the complex,the Fe（Ⅲ） ion displays a slightly distorted pentagonal bipyramidal geometry with seven coordination numbers.Cyclic-voltammetry measurement reveals the oxidation and reduction processes for the complex are quasi-reversible in nature.展开更多
The two complexes [Ni(oxen)Cu(L)2](ClO4)2.xH2O (L=2,2'-bipyridyl(bpy), 1,10-phenanthroline(phen)) have been synthesized, where oxen is N,N'-bis(2-aminoethyl)oxamido di-anion. The crystal structure of [Ni(oxen)...The two complexes [Ni(oxen)Cu(L)2](ClO4)2.xH2O (L=2,2'-bipyridyl(bpy), 1,10-phenanthroline(phen)) have been synthesized, where oxen is N,N'-bis(2-aminoethyl)oxamido di-anion. The crystal structure of [Ni(oxen)Cu(bpy)2](ClO4)2.CH3OH has been determined by X-ray diffraction method. The crystal is triclinic system, space group P1 with a=12.179(1),b=12.298(2), c=11.476(2) A, a=97.57(1), B=97.52(1), 7=80.29(2), V=1669.04(67) A3, Z=2, Dcalcd=1.667 g/cm3. The structure has been refined to final R of 0.076 and Rw of 0.080, respectively. The complexes have an extended oxamido-bridged structure and consist of Ni(Ⅱ) ion in a square planar environment and Cu(Ⅱ) ion in a distorted octahedral environment.展开更多
A lariat crown ether ligand 7,16-bis (2-hydroxy-5-methylbenzyl)-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane (L1) has been prepared via one-pot Mannich reaction. Its copper(II) complex Cu-L1 was synthesized and charac...A lariat crown ether ligand 7,16-bis (2-hydroxy-5-methylbenzyl)-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane (L1) has been prepared via one-pot Mannich reaction. Its copper(II) complex Cu-L1 was synthesized and charac-terized by elemental analysis, IR and UV-visible spectroscopy. The crystal structure of the complex has been deter-mined by X-ray diffraction analysis. The result shows that the copper(II) ion is six-coordinated by two nitrogen and four oxygen atoms, two from the crown ether and the other two from the deprotonated phenolate anions, forming an elongated octahedral complex. Electrochemical study indicates that the complex undergoes reversible reduction in DMF solution.展开更多
Quantitative reaction between copper（I） cyanide and triphenyl phosphite forms copper（I） complex [（P（OPh）3）gCug（CN）4] （1）. X-Ray crystal structure shows a catenarian polymer of tandem interconnected copper ...Quantitative reaction between copper（I） cyanide and triphenyl phosphite forms copper（I） complex [（P（OPh）3）gCug（CN）4] （1）. X-Ray crystal structure shows a catenarian polymer of tandem interconnected copper cyanide, with C and N connecting to proximal Cu atoms. The Cu atoms adopt two different conformations： one exhibits linear construction, while the other exhibits distorted tetrahedral geometry through coordinating to two cyano groups and the P donors of triphenyl phosphite molecules. The feature of 1 is the propagation pattern of two- and four-coordination along with the chain. IR and electronic absorption spectra also confirm the established single crystal structure. Thermal analysis indicates that 1 has a high thermal stability. 3-D fluorescence result shows the middle absorption peaks with the maximum excitement and emission wavelength 342 and 350 nm, respectively. Cyclic voltammogram in DMSO, DMF and MeCN gives a midpoint voltage of --0.003, 0.061 and 0.137 V versus SCE, respectively, showing the different solvent virtue on reduction potential.展开更多
The title compound Cd（Eim）3Cl2 （Eim = N-ethylimidazole） I has been synthesized and structurally characterized by single-crystal X-ray diffraction. The compound crystallizes in the monoclinic system, space group P2...The title compound Cd（Eim）3Cl2 （Eim = N-ethylimidazole） I has been synthesized and structurally characterized by single-crystal X-ray diffraction. The compound crystallizes in the monoclinic system, space group P2 1 with a = 8.0460（16）, b = 29.186（6）, c = 8.8960（18）A,β= 100.06（3）°, C15H24CdCl2N6, Mr = 471.71, V = 2056.9（7）A^3 Z = 4, Dc = 1.523 g/cm^3,/1 = 1.330 mm^-1, F（000） = 952, the final R = 0.0455 and wR = 0.0723. The title compound crystallizes with two molecules in the asymmetric unit. Each Cd^II ion is coordinated by three Eim ligands and two Cl anions in a trigonal bipyramidal geometry in two molecules. The weak intermolecular C-H……Cl hydrogen bonds link the molecules into two independent hydrogen-bonded chains running along the c axis. According to the cyclic voltammogram measurement in H2O, the electrode reaction should be a quasi-reversible process.展开更多
A new cadmium（N） compound, {[ CdLu-（4,4＇-dps） ]2（H2O）2]＇（4＇abs ）2（H2O）2n 1 （4,4＇-dps = 4,4＇-dipyridylsulfide, 4-abs = deprotonated 4-amino benzenesulfonic acid）, has been synthesized and structurally ...A new cadmium（N） compound, {[ CdLu-（4,4＇-dps） ]2（H2O）2]＇（4＇abs ）2（H2O）2n 1 （4,4＇-dps = 4,4＇-dipyridylsulfide, 4-abs = deprotonated 4-amino benzenesulfonic acid）, has been synthesized and structurally characterized. It belongs to the orthorhombic system, space group Pbcn with a = 19.950（3）, b = 10.6381（13）, c = 18.055（2）A, V= 3831.8（8） A3, Z = 4, C32H36CdN6010S4, Mr = 905.31, F（000） = 1848, μ= 0.850 mm^-1, Dc = 1.569 Mg/m^3, the final R = 0.0238 and wR = 0.0589 for 3080 observed reflections with I 〉 2σ（I）. Complex I is a one-dimensional linear chain coordination polymer and the repeat unit is comprised of doubly charged cadmium complex cation, uncoordinated 4-aminobenzene sulfonate anions and water molecules. The cadmium（H） ion adopts a six-coordinate distorted octahedral geometry. Complex 1 is stabilized and linked into a three-dimensional layered structure through intermolecular O-H…O and N-H…O hydrogen bonds together with electrostatic force. The cyclic voltammograms and fluorescence spectrum of 1 were also measured. It shows one irreversible redox process and emits a very strong and sharp fluorescent band at about 341 nm.展开更多
Three polyoxometalate-based hybrid coordination materials,[Co_(8)(H_(2)O)_(34)(pz)_(2){Co_(4)(H_(2)O)_(2)P_(4)W_(30)O_(112)}]·16H_(2)O(compound 1),[H_(3)O]_(4)[Co_(6)(H_(2)O)_(22)(pz)_(2){Co_(4)(H_(2)O)_(2)P_(4)W...Three polyoxometalate-based hybrid coordination materials,[Co_(8)(H_(2)O)_(34)(pz)_(2){Co_(4)(H_(2)O)_(2)P_(4)W_(30)O_(112)}]·16H_(2)O(compound 1),[H_(3)O]_(4)[Co_(6)(H_(2)O)_(22)(pz)_(2){Co_(4)(H_(2)O)_(2)P_(4)W_(30)O_(112)}]·21H_(2)(compound 2),and[H_(3)O]_(4)[Co_(6)(H_(2)O)_(22){Co_(4)(H_(2)O)_(2)P_(4)W_(30)O_(112)}]·29H_(2)O(compound 3)(pz-pyrazine),were built from the linkage of[Co_(4)(H_(2)O)_(2)(P_(2)W_(15)O_(56)_(2)]^(16-)-(abbreviated as{Co_(4)P_(4)W_(30})polyanions and pz and/or cobalt(II)cations.Although compounds 1 and 2 consisted of the same components,their lamellar networks were quite different.The inorganic lamellar network in compound 3 was constructed by connecting{Co_(4)P_(4)W_(30)}units with cobalt(I)cations.This work demonstrates that the coordination modes of{Co_(4)P_(4)W_(30)}are very sensitive to synthesis conditions,while the ring-belt tetrametals are easily substituted by different transition metal cations under mild reaction conditions.展开更多
A new MOF [Li2（muc）（H2O）2] （1,H2muc = mucic acid） has been synthesized and characterized. 1 crystallizes in the monoclinic system,space group P21/c with a = 4.7884（1）,b = 19.4618（5）,c = 5.3639（2） ,β = 96....A new MOF [Li2（muc）（H2O）2] （1,H2muc = mucic acid） has been synthesized and characterized. 1 crystallizes in the monoclinic system,space group P21/c with a = 4.7884（1）,b = 19.4618（5）,c = 5.3639（2） ,β = 96.628（2）°,V = 496.53（2） 3,Z = 2,Mr = 258.04,Dc = 1.726 Mg/m3,F（000） = 268,μ = 0.164 mm-1,the final R = 0.0311 and wR = 0.0845 for 946 observed reflections with I 〉2σ（Ⅰ）. The 2D undulating layers are extended into a 3D supramolecular network via hydrogen bonds. The 2D layer structure can be rationalized as an unusual binodal 4-connected network with kgm topology. Cyclic voltammetry curves exhibit one pair of redox peaks and two reduction waves.展开更多
The single crystal of [CuCo(TS)(H2O)·H2O],where TS is the schiff base N,N’ bis(3 carboxylsalidene)trimethylenediamine, was obtained and its crystal structure was determined by the single crystal X ray diffractio...The single crystal of [CuCo(TS)(H2O)·H2O],where TS is the schiff base N,N’ bis(3 carboxylsalidene)trimethylenediamine, was obtained and its crystal structure was determined by the single crystal X ray diffraction method at room temperature. It crystallizes in the monoclinic system, space group P21/c. The lattice parameters are a=11.855(2)?, b=14.722(3)?, c=12.080(2)?, β=117.32(3)°, V=1879.4(7)?3 , Z=4 with R1=0.0330. The structure is made of heterobinuclear units . The copper atom is coordinated by two nitrogens, two phenolic oxygens, in a square planar manner. And the cobalt atom is coordinated by two phenolic oxygen atoms, two equatorial carboxyl oxygen atoms and one axial water oxygen atom, in a distorted square pyramid. Two metal atoms are bridged by two phenolic oxygens. In the crystal packing, the neutral molecules built layers. Within these layers the molecules are connected through hydrogen bonds. And the thermal property of the complex according to crystal structure is also investigated.展开更多
合成了2,2′,2″-三氨基乙基胺(tren)Schiff碱和咪唑为配体的2个铜(Ⅱ)单核配合物[(tren)Cu](ClO4)2、[(tren)Cu-imH](ClO4)2,以及一个对称性的咪唑桥联铜锌异双核配合物[(tren)Cu im Zn(tren)](ClO4)3,用元素分析、摩尔电导、反射光谱...合成了2,2′,2″-三氨基乙基胺(tren)Schiff碱和咪唑为配体的2个铜(Ⅱ)单核配合物[(tren)Cu](ClO4)2、[(tren)Cu-imH](ClO4)2,以及一个对称性的咪唑桥联铜锌异双核配合物[(tren)Cu im Zn(tren)](ClO4)3,用元素分析、摩尔电导、反射光谱及磁化率测定对配合物的组成和结构进行了表征。采用循环伏安法分别研究了配合物在乙腈和水溶液中的电化学性质,研究表明:Zn(Ⅱ)能通过咪唑桥改变Cu(Ⅱ)接受电子的能力。在水溶液中咪唑桥异双核配合物较稳定,未发生断裂。展开更多
合成了二亚乙基三胺(dien)和咪唑为配体的两个铜(Ⅱ)单核配合物[(dien)Cu](ClO4)2[、(dien)Cu imH](ClO4)2和一个非对称性的咪唑桥联铜锌异双核配合物[(dien)Cu im Zn(tren)](ClO4)3,用元素分析、摩尔电导、反射光谱及磁化率测定对配合...合成了二亚乙基三胺(dien)和咪唑为配体的两个铜(Ⅱ)单核配合物[(dien)Cu](ClO4)2[、(dien)Cu imH](ClO4)2和一个非对称性的咪唑桥联铜锌异双核配合物[(dien)Cu im Zn(tren)](ClO4)3,用元素分析、摩尔电导、反射光谱及磁化率测定对配合物的组成和结构进行了表征。采用循环伏安法分别研究了配合物在乙腈和水溶液中的电化学性质,研究表明,Zn(Ⅱ)能通过咪唑桥改变Cu(Ⅱ)接受电子的能力,增强催化歧化超氧离子的活性。在水溶液中咪唑桥异双核配合物不很稳定,部分从Zn(Ⅱ)端断裂。展开更多
基金supported by the National Natural Science Foundation of China(No.21273101)the Foundation of the Program for Backbone Teachers in Universities of Henan Province(No.2012GGJS158)+1 种基金tackle key problem of science and technology Project of Henan Province(No.142102310483)the Foundation of Education Committee of Henan Province(No.14B150033)
文摘A new cobalt（II） complex [Co（NO2-salen）2]·1.5H2O containing mono acetalization Schiff base ligand（NO2-salen = N-5-nitro-salicylideneamino ethanato） has been prepared through one-pot template condensation, and has been structurally characterized by elemental analysis, IR spectra and X-ray diffraction. It is formulated as C18H23CoN6O7.5, crystallizes in the hexagonal system, space group of R-3c with α = 25.895（18）, b = 25.895（18）, c = 35.075（6）, γ = 120o, V = 20368（3） and Z = 36. The ligand of 5-nitrosalicylaldehyde-ethylene-diamine takes unusual mono asymmetry mode. The Co（II） ion exhibits a coordination number of six, and assumes a distorted octahedral geometry with a N2O4 donor set. The neutral monomeric units of [Co（NO2-salen）2]·1.5H2O are linked into a one-dimensional（1D） structure via the intermolecular hydrogen bonds and weak π-π stacking interactions. Cyclic-voltammetry measurement reveals the oxidation and reduction processes for the complex are irreversible in nature.
基金supported by the National Natural Science Foundation of China (Nos 20771054 and 20671076)the Natural Science Foundation of Henan Province (No 0311021200)
文摘Reaction of 3,5-pyridine-dicarboxylic acid（3,5-PydcH2） with iron salt in hydrothermal condition results in the formation of a three-dimensional self-assembly network formulated as [C14H14Fe2N2O12]n,and it has been structurally characterized by elemental analysis,IR spectra and X-ray diffraction.It crystallizes in the monoclinic system,space group C2/c with a=9.9633（15）,b=12.0942（18）,c=7.4297（11）A and β=105.822o.The units of Fe2（pydc）2·2H2O are linked into a one-dimensional structure via the chelate carboxylate groups from the 3,5-pyridine-dicarboxylate.The interlayer hydrogen bonding interactions result in a three-dimensional supramolecular architecture.In the complex,the Fe（Ⅲ） ion displays a slightly distorted pentagonal bipyramidal geometry with seven coordination numbers.Cyclic-voltammetry measurement reveals the oxidation and reduction processes for the complex are quasi-reversible in nature.
基金Project supported by the National Natural Science Foundation of China and the Natural Science Foundation of Henan Province.
文摘The two complexes [Ni(oxen)Cu(L)2](ClO4)2.xH2O (L=2,2'-bipyridyl(bpy), 1,10-phenanthroline(phen)) have been synthesized, where oxen is N,N'-bis(2-aminoethyl)oxamido di-anion. The crystal structure of [Ni(oxen)Cu(bpy)2](ClO4)2.CH3OH has been determined by X-ray diffraction method. The crystal is triclinic system, space group P1 with a=12.179(1),b=12.298(2), c=11.476(2) A, a=97.57(1), B=97.52(1), 7=80.29(2), V=1669.04(67) A3, Z=2, Dcalcd=1.667 g/cm3. The structure has been refined to final R of 0.076 and Rw of 0.080, respectively. The complexes have an extended oxamido-bridged structure and consist of Ni(Ⅱ) ion in a square planar environment and Cu(Ⅱ) ion in a distorted octahedral environment.
基金the Municipal Natural Science Foundation of Beijing (No. 2022011).
文摘A lariat crown ether ligand 7,16-bis (2-hydroxy-5-methylbenzyl)-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane (L1) has been prepared via one-pot Mannich reaction. Its copper(II) complex Cu-L1 was synthesized and charac-terized by elemental analysis, IR and UV-visible spectroscopy. The crystal structure of the complex has been deter-mined by X-ray diffraction analysis. The result shows that the copper(II) ion is six-coordinated by two nitrogen and four oxygen atoms, two from the crown ether and the other two from the deprotonated phenolate anions, forming an elongated octahedral complex. Electrochemical study indicates that the complex undergoes reversible reduction in DMF solution.
文摘Quantitative reaction between copper（I） cyanide and triphenyl phosphite forms copper（I） complex [（P（OPh）3）gCug（CN）4] （1）. X-Ray crystal structure shows a catenarian polymer of tandem interconnected copper cyanide, with C and N connecting to proximal Cu atoms. The Cu atoms adopt two different conformations： one exhibits linear construction, while the other exhibits distorted tetrahedral geometry through coordinating to two cyano groups and the P donors of triphenyl phosphite molecules. The feature of 1 is the propagation pattern of two- and four-coordination along with the chain. IR and electronic absorption spectra also confirm the established single crystal structure. Thermal analysis indicates that 1 has a high thermal stability. 3-D fluorescence result shows the middle absorption peaks with the maximum excitement and emission wavelength 342 and 350 nm, respectively. Cyclic voltammogram in DMSO, DMF and MeCN gives a midpoint voltage of --0.003, 0.061 and 0.137 V versus SCE, respectively, showing the different solvent virtue on reduction potential.
基金the National Natural Science Foundation of China (20601015)
文摘The title compound Cd（Eim）3Cl2 （Eim = N-ethylimidazole） I has been synthesized and structurally characterized by single-crystal X-ray diffraction. The compound crystallizes in the monoclinic system, space group P2 1 with a = 8.0460（16）, b = 29.186（6）, c = 8.8960（18）A,β= 100.06（3）°, C15H24CdCl2N6, Mr = 471.71, V = 2056.9（7）A^3 Z = 4, Dc = 1.523 g/cm^3,/1 = 1.330 mm^-1, F（000） = 952, the final R = 0.0455 and wR = 0.0723. The title compound crystallizes with two molecules in the asymmetric unit. Each Cd^II ion is coordinated by three Eim ligands and two Cl anions in a trigonal bipyramidal geometry in two molecules. The weak intermolecular C-H……Cl hydrogen bonds link the molecules into two independent hydrogen-bonded chains running along the c axis. According to the cyclic voltammogram measurement in H2O, the electrode reaction should be a quasi-reversible process.
基金supported by the National Natural Science Foundation of China (No. 20471026)the Natural Science Foundation of Henan Province (No. 0311021200)
文摘A new cadmium（N） compound, {[ CdLu-（4,4＇-dps） ]2（H2O）2]＇（4＇abs ）2（H2O）2n 1 （4,4＇-dps = 4,4＇-dipyridylsulfide, 4-abs = deprotonated 4-amino benzenesulfonic acid）, has been synthesized and structurally characterized. It belongs to the orthorhombic system, space group Pbcn with a = 19.950（3）, b = 10.6381（13）, c = 18.055（2）A, V= 3831.8（8） A3, Z = 4, C32H36CdN6010S4, Mr = 905.31, F（000） = 1848, μ= 0.850 mm^-1, Dc = 1.569 Mg/m^3, the final R = 0.0238 and wR = 0.0589 for 3080 observed reflections with I 〉 2σ（I）. Complex I is a one-dimensional linear chain coordination polymer and the repeat unit is comprised of doubly charged cadmium complex cation, uncoordinated 4-aminobenzene sulfonate anions and water molecules. The cadmium（H） ion adopts a six-coordinate distorted octahedral geometry. Complex 1 is stabilized and linked into a three-dimensional layered structure through intermolecular O-H…O and N-H…O hydrogen bonds together with electrostatic force. The cyclic voltammograms and fluorescence spectrum of 1 were also measured. It shows one irreversible redox process and emits a very strong and sharp fluorescent band at about 341 nm.
基金financially supported by NSAF(No.U1530155)Ministry of Science and Technology(MOST)of China,US–China Collaboration on Cutting-edge Technology Development of Electric Vehicle,the Nation Key Basic Research Program of China(No.2015CB251100)Beijing Key Laboratory of Environmental Science and Engineering(No.20131039031)
基金This work is supported by the National Natural Science Foundation of China(Nos.21525312 and 21872122).
文摘Three polyoxometalate-based hybrid coordination materials,[Co_(8)(H_(2)O)_(34)(pz)_(2){Co_(4)(H_(2)O)_(2)P_(4)W_(30)O_(112)}]·16H_(2)O(compound 1),[H_(3)O]_(4)[Co_(6)(H_(2)O)_(22)(pz)_(2){Co_(4)(H_(2)O)_(2)P_(4)W_(30)O_(112)}]·21H_(2)(compound 2),and[H_(3)O]_(4)[Co_(6)(H_(2)O)_(22){Co_(4)(H_(2)O)_(2)P_(4)W_(30)O_(112)}]·29H_(2)O(compound 3)(pz-pyrazine),were built from the linkage of[Co_(4)(H_(2)O)_(2)(P_(2)W_(15)O_(56)_(2)]^(16-)-(abbreviated as{Co_(4)P_(4)W_(30})polyanions and pz and/or cobalt(II)cations.Although compounds 1 and 2 consisted of the same components,their lamellar networks were quite different.The inorganic lamellar network in compound 3 was constructed by connecting{Co_(4)P_(4)W_(30)}units with cobalt(I)cations.This work demonstrates that the coordination modes of{Co_(4)P_(4)W_(30)}are very sensitive to synthesis conditions,while the ring-belt tetrametals are easily substituted by different transition metal cations under mild reaction conditions.
基金supported by the Science and Technology Department of Zhejiang Province (2007C21174)
文摘A new MOF [Li2（muc）（H2O）2] （1,H2muc = mucic acid） has been synthesized and characterized. 1 crystallizes in the monoclinic system,space group P21/c with a = 4.7884（1）,b = 19.4618（5）,c = 5.3639（2） ,β = 96.628（2）°,V = 496.53（2） 3,Z = 2,Mr = 258.04,Dc = 1.726 Mg/m3,F（000） = 268,μ = 0.164 mm-1,the final R = 0.0311 and wR = 0.0845 for 946 observed reflections with I 〉2σ（Ⅰ）. The 2D undulating layers are extended into a 3D supramolecular network via hydrogen bonds. The 2D layer structure can be rationalized as an unusual binodal 4-connected network with kgm topology. Cyclic voltammetry curves exhibit one pair of redox peaks and two reduction waves.
文摘The single crystal of [CuCo(TS)(H2O)·H2O],where TS is the schiff base N,N’ bis(3 carboxylsalidene)trimethylenediamine, was obtained and its crystal structure was determined by the single crystal X ray diffraction method at room temperature. It crystallizes in the monoclinic system, space group P21/c. The lattice parameters are a=11.855(2)?, b=14.722(3)?, c=12.080(2)?, β=117.32(3)°, V=1879.4(7)?3 , Z=4 with R1=0.0330. The structure is made of heterobinuclear units . The copper atom is coordinated by two nitrogens, two phenolic oxygens, in a square planar manner. And the cobalt atom is coordinated by two phenolic oxygen atoms, two equatorial carboxyl oxygen atoms and one axial water oxygen atom, in a distorted square pyramid. Two metal atoms are bridged by two phenolic oxygens. In the crystal packing, the neutral molecules built layers. Within these layers the molecules are connected through hydrogen bonds. And the thermal property of the complex according to crystal structure is also investigated.
文摘合成了2,2′,2″-三氨基乙基胺(tren)Schiff碱和咪唑为配体的2个铜(Ⅱ)单核配合物[(tren)Cu](ClO4)2、[(tren)Cu-imH](ClO4)2,以及一个对称性的咪唑桥联铜锌异双核配合物[(tren)Cu im Zn(tren)](ClO4)3,用元素分析、摩尔电导、反射光谱及磁化率测定对配合物的组成和结构进行了表征。采用循环伏安法分别研究了配合物在乙腈和水溶液中的电化学性质,研究表明:Zn(Ⅱ)能通过咪唑桥改变Cu(Ⅱ)接受电子的能力。在水溶液中咪唑桥异双核配合物较稳定,未发生断裂。
文摘合成了二亚乙基三胺(dien)和咪唑为配体的两个铜(Ⅱ)单核配合物[(dien)Cu](ClO4)2[、(dien)Cu imH](ClO4)2和一个非对称性的咪唑桥联铜锌异双核配合物[(dien)Cu im Zn(tren)](ClO4)3,用元素分析、摩尔电导、反射光谱及磁化率测定对配合物的组成和结构进行了表征。采用循环伏安法分别研究了配合物在乙腈和水溶液中的电化学性质,研究表明,Zn(Ⅱ)能通过咪唑桥改变Cu(Ⅱ)接受电子的能力,增强催化歧化超氧离子的活性。在水溶液中咪唑桥异双核配合物不很稳定,部分从Zn(Ⅱ)端断裂。
