Utilizing N-[（4-carboxyphenyl）-sulfonyl]glycine （abbreviated as cbsglyH3）,a new cobalt complex [Co（cbsglyH）（bipy）2]3H2O （bipy = 2,2＇-bipyridine） has been synthesized under mild conditions and characterized ...Utilizing N-[（4-carboxyphenyl）-sulfonyl]glycine （abbreviated as cbsglyH3）,a new cobalt complex [Co（cbsglyH）（bipy）2]3H2O （bipy = 2,2＇-bipyridine） has been synthesized under mild conditions and characterized by IR,elemental analysis,thermogravimetric analysis and X-ray diffraction analysis. It crystallizes in the monoclinic system,space group C2/c with a = 34.978（3）,b = 12.0437（11）,c = 20.0041（19） ,β = 122.2990（10）°,V = 7123.0（11） 3,Z = 8,C29H28CoN5O9S,Mr = 681.55,μ = 0.593 mm-1,Dc = 1.271 Kg/m3,F（000） = 2816,the final R = 0.0434 and wR = 0.1351. The title complex is a monomeric compound which is further assembled by intermolecular hydrogen bonds into a 3-D supramolecular network. Thermogravimetric analysis illustrates that this complex begins decomposing at 100 ℃ and decompounding completely at 560 ℃.展开更多
A novel zinc complex [Zn（BIB）（bdc）]n（1, BIB = 1,3-bis（imidazol-1-yl）benzene, bdc = 1,3-benzenedicarboxylate） has been synthesized in solvothermal conditions. The title complex was characterized by elemental an...A novel zinc complex [Zn（BIB）（bdc）]n（1, BIB = 1,3-bis（imidazol-1-yl）benzene, bdc = 1,3-benzenedicarboxylate） has been synthesized in solvothermal conditions. The title complex was characterized by elemental analysis, IR spectra, thermal analysis, single-crystal and powder X-ray diffraction. The result proved that the alliance of BIB and aromatic carboxylic acids is good for the diversity of getatable structure. Complex 1 crystallizes in the monoclinic system of P2/c space group with a = 11.5591（10）, b = 9.6239（8）, c = 33.727（3）A, β = 103.816（3）°, V = 3643.4（5） A^3, Z = 8, μ = 1.385 mm^-1, F（000） = 1792, Dc = 1.603 g/cm^3 and Mr = 439.72 g/mol. Additionally, luminescent properties of complex 1 are also investigated and it shows good fluorescence.展开更多
The synthesis,structure and luminescent property of a tetranuclear gold（Ⅰ）complex with doubly bridging diethyldithiocarbamate（Et2dtc）and 1,1-bis（diphenylphosphino）ethene（（Ph2P）2C=CH2）are described.The compl...The synthesis,structure and luminescent property of a tetranuclear gold（Ⅰ）complex with doubly bridging diethyldithiocarbamate（Et2dtc）and 1,1-bis（diphenylphosphino）ethene（（Ph2P）2C=CH2）are described.The complex crystallizes in monoclinic space group C2/c with a=26.785（7）,b=25.654（6）,c=12.277（3）A,β=106.879（5）°,V=8073（4）A^3,Z=8,C31H32Au2F6NO3P2S2Sb,Mr=1222.32,Dc=2.011 g/cm^3,F（000）=4592,Rint=0.0529,T=293（2）K,μ=8.157 mm^（-1）,the final R=0.0464 and wR=0.1444 for 5804 observed reflections with I〉2σ（Ⅰ）.The intramolecular and intermolecular Au¨Au distances are 2.8670（9）and 3.2367（9）A,respectively.Weak emission appears at 517 nm at room temperature in the solid state.展开更多
A novel mononuclear copper（Ⅱ） complex [Cu（bbmc）Cl_2]·DMF,where bbmc is 1,1-bis（1H-benzoimidazol-2-ylmethyl）cyclohexane,was synthesized and characterized by X-ray single-crystal structure analysis.The compl...A novel mononuclear copper（Ⅱ） complex [Cu（bbmc）Cl_2]·DMF,where bbmc is 1,1-bis（1H-benzoimidazol-2-ylmethyl）cyclohexane,was synthesized and characterized by X-ray single-crystal structure analysis.The complex crystallizes in triclinic,space group P1 with a = 9.1088（5）,b = 11.0075（4）,c = 14.2326（6）A,α = 97.188（3）,β = 96.394（4）,γ = 111.430（4）°,V = 1298.73（10） A^3,Z = 2,D_c = 1.409 g/cm^3,μ（Mo Kα） = 1.074 mm^-1,F（000） = 572,S = 1.078,R = 0.0381 and w R = 0.0876 for 5593 observed reflections with I 〉 2σ（I）.The central Cu（Ⅱ） ion adopts a distorted tetrahedral geometry coordinated by two nitrogen atoms of the ligand and two chloride ions.The complex showed its thermal decomposition temperature up to 226 ℃ and exhibited an irreversible one-electron transfer process involving Cu^Ⅱ/Cu^I couple.展开更多
A new 3D cobalt metal-organic framework [C_7H_（13）N_2]_2[（CH_3COO）_2Co_7（oba）_5-（Hoba）_2（OH）_2]·H_2O has been synthesized under ionothermal conditions and characterized by elemental analysis, FT-IR, XRD...A new 3D cobalt metal-organic framework [C_7H_（13）N_2]_2[（CH_3COO）_2Co_7（oba）_5-（Hoba）_2（OH）_2]·H_2O has been synthesized under ionothermal conditions and characterized by elemental analysis, FT-IR, XRD, and TG. This complex crystallizes in monoclinic system, space group P21/c with a = 19.4499（4）, b = 10.8839（2）, c = 27.7796（5） ？, β = 104.467（2）o, V = 5694.22（19） ？~3, Z = 2, C_（116）H_（92）Co_7N_4O_（42）, M_r = 2626.45, D_c = 1.532 g/cm^3 , F（000） = 2682, μ = 1.085 mm-1, R = 0.0387 and wR = 0.1177. Its structure is characterized as a 3D open framework constructed by seven nuclear clusters [（CH_3COO）_Co_7（OH）_2] and the 4,4？-oxybisbenzoic acid ligand. The used ILs cations are located in the middle of the pore and compensate for the negative charges of framework. Furthermore, its fluorescence property has also been studied.展开更多
Complex salt Co_2Cl_5(py)_5 (py=pyridine) was obtained by the reaction of CoCl_2·6H_2O with Bu_4NMnO_4 in pyridine in the presence of benzoic acid. It is monoclinic and crystallizes in space group P2_1/n, fw=690....Complex salt Co_2Cl_5(py)_5 (py=pyridine) was obtained by the reaction of CoCl_2·6H_2O with Bu_4NMnO_4 in pyridine in the presence of benzoic acid. It is monoclinic and crystallizes in space group P2_1/n, fw=690.64, a=28.652(5), b=14.108(4), c=7.424(3) ;β=90.09(1); V=3001(2)~3; Z=4, Dc=1.53g/cm^3. Final R factor is 0.041. The structure consists of a discrete cation [Co~ⅢCl_2(py)_4]^+ and an anion [Co~Ⅱ Cl_3(py)]^-. The Co~Ⅲ ion is coordinated by two Cl^- and four pyridine nitrogen atoms to form an octahedral geometry, and Co~Ⅱ is coordinated by three Cl^- and one pyridine nitrogen atom to form the apices of a tetrahedron. The variable-temperature magnetic susceptility measurement shows no magnet-exchange interaction between Co~Ⅲ and Co~Ⅱ ions.展开更多
0 INTRODUCTION Microplastics are defined as small plastic debris(1μm-5 mm),which have complex properties of widerange densities(0.05-2.3 g/cm^3),diverse shapes(e.g.,beads,fibers,foam and pellets)and low degradability...0 INTRODUCTION Microplastics are defined as small plastic debris(1μm-5 mm),which have complex properties of widerange densities(0.05-2.3 g/cm^3),diverse shapes(e.g.,beads,fibers,foam and pellets)and low degradability(Harris,2020;Chubarenko et al.,2016).展开更多
Two new Co（Ⅱ） coordination polymers,{[Co_3（Hchda）_2（chda）_2（bpp）_2（H_2O）_2]}_n 1 and {[Co（chda）（bpe）（H_2O）]·3H_2O}_n 2（H_2chda = 1,1-cyclohexanediacetic acid,bpp = 1,3-bis（4-pyridinyl）propane ...Two new Co（Ⅱ） coordination polymers,{[Co_3（Hchda）_2（chda）_2（bpp）_2（H_2O）_2]}_n 1 and {[Co（chda）（bpe）（H_2O）]·3H_2O}_n 2（H_2chda = 1,1-cyclohexanediacetic acid,bpp = 1,3-bis（4-pyridinyl）propane and bpe = 1,2-bis（4-pyridinyl）ethylene）,were hydrothermally synthesized and then characterized by elemental analysis,IR spectroscopy,thermogravimetric analysis（TGA）,and single-crystal X-ray diffraction.Complex 1 possesses an infinite metal-organic layer based on triply bridged linear trinuclear subunits and complex 2 exhibits a square（4,4） grid layer with dangling lateral arms resulting from eight-membered rings above and below the layer.In addition,magnetic properties of complexes 1 and 2 are also given.展开更多
A Schiff base L [2-thiophenecarboxylic acid, 2-（2-pyridinylmethylene）hydrazide] with its lanthanide metal complexes was synthesized. These complexes were characterized by elemental analysis, molar conductivity measu...A Schiff base L [2-thiophenecarboxylic acid, 2-（2-pyridinylmethylene）hydrazide] with its lanthanide metal complexes was synthesized. These complexes were characterized by elemental analysis, molar conductivity measurements, spectral analysis（NMR, FT-IR, and UV-Vis）, luminescence and thermal gravimetric analysis. The Schiff base ligand was a tridentate chelate and coordinates to the central lanthanide ion with 1：2 metal：ligand ratio. The conductivity data showed a 1：1 electrolytic nature with a general formula [LnL_2（NO_3）_2]NO_3. The luminescence emission properties for Sm, Tb, and Eu complexes were observed and showed that the ligand L could absorb and transfer energy to Sm（III）, Tb（III） and Eu（III） ions. The complexes possessed a good antibacterial activity against different bacterial strains. In addition, the scavenging activity of the Ln（III） complexes on DPPH was concentration dependant and the complexes were significantly more efficient in quenching DPPH than the free Schiff base ligand.展开更多
A new polymeric complex {[Cd2（bbmb）2（gt）2]＇（H2O）2}, （bbmb = 4,4＇-bis（benzimidazol-l-ylmethyl）biphenyl, H2gt = glutaric acid） has been obtained by hyclrothermal method and structurally characterized by elem...A new polymeric complex {[Cd2（bbmb）2（gt）2]＇（H2O）2}, （bbmb = 4,4＇-bis（benzimidazol-l-ylmethyl）biphenyl, H2gt = glutaric acid） has been obtained by hyclrothermal method and structurally characterized by elemental analysis, IR, XRD, TGA and single-crystal X-ray diffraction. The complex belongs to the triclinic system, space group P1 with a = 10.2417（15）, b = 13.752（2）, c = 22.201（3） A, a = 73.899（2）, β = 88.416（2）, y = 78.305（2）°, V = 2940.4（7） A3, Z = 2, C66H56Cd2N808, Mr = 1313.99, Dc = 1.484 g/cm3, F（000） = 1336 and μ = 0.787 mm-1, and features a 2D network. In the solid state at room temperature, the cadmium（Ⅱ） complex exhibits strong fluorescence absorption at 435 nm （λmax）.展开更多
The popular single-factor complexity measure cannot comprehensively reflect program complexity and the existing hybrid complexity measure cannot express the interactive behaviors of programs. To treat these problems, ...The popular single-factor complexity measure cannot comprehensively reflect program complexity and the existing hybrid complexity measure cannot express the interactive behaviors of programs. To treat these problems, in this paper, we propose a complexity measure based on program slicing（CMBPS）. CMPBS not only can evaluate factors which affect program complexity such as the length of the program, control flow, data flow and data types of output variables, but also can give expression of the interactive relation between programs. And we also prove that CMBPS satisfies all of Weyuker properties. Compared with the popular complexity measures, CMBPS is a well-structured complexity measure.展开更多
One new Zn（Ⅱ） complex [Zn2（cptpy）2（tzba）（H2O）]·H2O（1, Hcptpy = 4-（4-carboxyphenyl）-2,2＇：4＇,4＇＇-terpyridine（Hcptpy）, H_2tzba = 4-（tetrazol-5-yl）benzenecarboxylic acid） has been synthesized an...One new Zn（Ⅱ） complex [Zn2（cptpy）2（tzba）（H2O）]·H2O（1, Hcptpy = 4-（4-carboxyphenyl）-2,2＇：4＇,4＇＇-terpyridine（Hcptpy）, H_2tzba = 4-（tetrazol-5-yl）benzenecarboxylic acid） has been synthesized and characterized by elemental analysis and single-crystal X-ray diffraction techniques. It is formulated as C52H36O8N10Zn2, crystallizes in monoclinic system, space group P21/c with α = 15.1599（13）, b = 28.083（2）, c = 10.9039（9） A, b = 97.517（8）o. V = 4602.3（6） A^3, Z = 4, Mr = 1059.68, Dc = 1.529 g/cm^3, F（000） = 2168 and μ = 1.112 mm^-1. The final R = 0.0831 and wR = 0.2143 for 8458 observed reflections with I 〉 2s（I）. The assembly of polyfunctional organic ligands Hcptpy and H_2tzba with Zn（II） atoms resulting in a rare example of double-edge ladders, which is further extended into a 3D supramolecular network via O–H…O/N hydrogen bonds. In addition, thermal gravimetric analysis（TGA） and PXRD patterns for 1 were studied. Photo luminescent property of 1 was also investigated.展开更多
Two zinc（II） complexes, namely, [Zn（L1）Cl2]2 （1） and {[Zn（L2）（tbta）]·3H2O}n （2） （L1 = 1,3-bis（2-methylbenzimidazol-1-ylmethyl）benzene, H2tbta = tetrabromoterephthalic acid, L2 = 1,3-bis（2-methylbe...Two zinc（II） complexes, namely, [Zn（L1）Cl2]2 （1） and {[Zn（L2）（tbta）]·3H2O}n （2） （L1 = 1,3-bis（2-methylbenzimidazol-1-ylmethyl）benzene, H2tbta = tetrabromoterephthalic acid, L2 = 1,3-bis（2-methylbenzimidazol-1-yl）-2-propanol） have been successfully obtained under hydrothermal conditions. Complex 1 displays binuclear structure which is further extended into a 1D supramolecular chain through π–π stacking. Complex 2 features 2D （4,4） network based on L2/tbta2– double linker. The thermal stability, fluorescence properties and catalytic activities of two complexes for degradation of Methyl orange in a Fenton-like process were discussed.展开更多
Two novel complexes, namely {[Cd（AIP）（4,4＇-bpy）]·1.3DMF}n（1） and [Cd（AIP）（2,2＇- bpy）]n（2）, have been synthesized through solvothermal reaction（H2AIP = 5-aminoisophthalic acid, 2,2＇-bpy = 2,2＇-bip...Two novel complexes, namely {[Cd（AIP）（4,4＇-bpy）]·1.3DMF}n（1） and [Cd（AIP）（2,2＇- bpy）]n（2）, have been synthesized through solvothermal reaction（H2AIP = 5-aminoisophthalic acid, 2,2＇-bpy = 2,2＇-bipyridine, 4,4＇-bpy = 4,4＇-bipyridine, and DMF = N,N＇-dimethylformamide） and structurally determined by single-crystal X-ray diffraction. Complex 1 shows a three-dimensional（3D） layer-pillar framework with rectangular channels, while complex 2 displays a two-dimensional（2D） wave net architecture. Furthermore, 1 and 2 were characterized by elemental analysis, infrared spectra（IR）, thermal gravimetric analyses（TGA） and fluorescence measurements. The luminescent properties of 1 dispersed in various organic solvents have been investigated systematically, demonstrating high selectivity for acetone via the fluorescence quenching effect.展开更多
A new material for both magnetic coupling and electrocatalytic hydrogen generation based on a copper complex,[（HL）CuCl-CuCl（HL）]HCl 1 is prepared by the reaction of 2-（pyridylmethyl）amino-N,N-bis（2-methylene-4,...A new material for both magnetic coupling and electrocatalytic hydrogen generation based on a copper complex,[（HL）CuCl-CuCl（HL）]HCl 1 is prepared by the reaction of 2-（pyridylmethyl）amino-N,N-bis（2-methylene-4,6-difluorophenol）（H2L） and CuCl2·2H2O.In solid,complex 1 is built from two copper units（[（HL）CuCl]）,and exhibits an antiferromagnetic exchange interaction between copper（Ⅱ） ions（J=-160cm^-1）.In liquid,1 can electrocatalyze hydrogen generation both from acetic acid with a turnover frequency（TOF） of 16.3 moles of hydrogen per mole of catalyst per hour at an overpotential（OP）of 941.6 mV（in DMF）,and a neutral buffer with a TOF of 1415.6 moles of hydrogen per mole of catalyst per hour at an OP of 787.6 mV.展开更多
A cuprous mononuclear copper complex [Cu（adpypz）CH3CNPPh3]BF4·CH2Cl2（1, adpypz = 9,9-dimethyl-10-（6-（3-phenyl-1H-pyrazol-1-yl）pyridin-2-yl）-9,10-dihydroacridine） was synthesized and characterized by Eleme...A cuprous mononuclear copper complex [Cu（adpypz）CH3CNPPh3]BF4·CH2Cl2（1, adpypz = 9,9-dimethyl-10-（6-（3-phenyl-1H-pyrazol-1-yl）pyridin-2-yl）-9,10-dihydroacridine） was synthesized and characterized by Elemental Analysis, NMR, UV-Vis and X-ray single-crystal structure analysis. It crystallizes in triclinic, space group P1 with a = 11.3388（4）, b = 13.4569（4）, c = 16.2561（6） ？, α = 97.154（3）, β = 92.187（3）, γ = 114.119（4）°, V = 2235.38（13） ？3, Z = 2, Mr = 967.12, Dc = 1.437 g/cm^3, F（000） = 996, μ = 2.62 mm^–1, GOOF = 1.031, the final R = 0.0417, and w R = 0.1024 for 8043 observed reflections with I 〉 2σ（I）. The Cu（I） atoms in the complex are four-coordinated and adopt a tetrahedral coordination geometry. In the solid state, the complex exhibits bluish-green photoluminescence with emission peaks λmax = 492 nm（1）, lifetimes 235 μs and quantum yields（ф = 0.279） at room temperature. The studies of varied temperature emission spectra and decay behaviours of the complex indicate that the complex displays thermally activated delayed fluorescence（TADF） at room temperature. The results of the experimental and DFT calculations suggest that the emission in the solid state originates from the ILCT excited states.展开更多
A new dinuclear iron（Ill） complex has been synthesized and structurally charac- terized by X-ray crystallography： [Fem2（L）（C6HsCOO）（SO4）（CH3OH）2]·CH3CN＇CH3OH （1, H3L = N,N＇-bis（salicylidene）q,3-di...A new dinuclear iron（Ill） complex has been synthesized and structurally charac- terized by X-ray crystallography： [Fem2（L）（C6HsCOO）（SO4）（CH3OH）2]·CH3CN＇CH3OH （1, H3L = N,N＇-bis（salicylidene）q,3-diamino-2-propanol）. Complex 1 belongs to orthorhombic space group Pna21 with a= 11.4400（8）, b = 22.9705（2）, c = 12.5712（9）A, V= 3303.5（4）A3, Z= 4, F（000） = 1576, Dc= 1.531 g·cm-3, Mr= 761.36,μ = 1.007 mm-1, S = 1.014, the final R= 0.0505 and wR= 0.1018. The crystal packing is stabilized by intermolecular O-H…O hydrogen bonds, forming an extended one-dimensional chain structure. The temperature dependence of magnetic susceptibility measurement shows that antiferromagnetic interaction is propagated between the metal centers. Fit as dinuclear arrangement gave parameters ofJ= 19.7 cm-1, g = 1.89 and R2 = 0.9999.展开更多
A new nickel（Ⅱ） complex Ni2（L）2（2,2＇-bipy）2·5.5H2O with methy-bicycle[2.2.1]hept-5-ene-2,3-dicarboxylic acid（H2L） and 2,2？-bipyridine（2,2＇-bipy） as ligands has been synthesized in the mixed solvent ...A new nickel（Ⅱ） complex Ni2（L）2（2,2＇-bipy）2·5.5H2O with methy-bicycle[2.2.1]hept-5-ene-2,3-dicarboxylic acid（H2L） and 2,2？-bipyridine（2,2＇-bipy） as ligands has been synthesized in the mixed solvent DMF and water（v：v = 5：2）. It crystallizes in the triclinic space group P1 with a = 10.414（2）, b = 12.884（3）, c = 16.176（4） A, α = 70.715（5）, β = 80.599（5）, γ = 77.383（6）°, V = 1989.4（8） A^3, Dc = 1.531 g/cm^3, Z = 2, F（000） = 958, GOOF = 1.028, the final R = 0.0808 and w R = 0.2036. The crystal structure shows that the whole molecule consists of two independent dinuclear units, in which two nickel ions are bridged by two μ2-η1：η0 3-carboxylate groups of L2- anions. The coordination environment of Ni（Ⅱ） ion is Ni N2O3, giving a distorted square pyramidal geometry. The thermal stability and electrochemical properties of the complex were investigated.展开更多
Three white crystalline aminopolyphosphonic acids, DTHMP, TTHMP and TPHMP were synthesized by a modified Mannich reaction under gentle conditions. The products were isolated and purified with a SP-Sephadex C-25 column...Three white crystalline aminopolyphosphonic acids, DTHMP, TTHMP and TPHMP were synthesized by a modified Mannich reaction under gentle conditions. The products were isolated and purified with a SP-Sephadex C-25 column. The acid-base and complexing properties of three aminopolyphosphonic acids with rare earth ions were investigated by means of potentiometric titration in aqueous medium at (25 +/- 0.1) degrees C and ionic strength I = 0.1 mol/L KNO3. The successive protonation constants of ligands and the formation constants of complexes with rare earth elements were obtained. The results show a double-double effect for lgK(MHiL) against atomic number of lanthanide. The properties are advantageous for the separation of the rare earth elements.展开更多
l,2-Bis(2,2'-bipyridinyl)ethylene(1) ligand was synthesized by Wittig-Horner reaction and 1, 2-Bis(2, 2'-bipyridinyl)ethane(2) ligand(which can be obtained via another route ) was prepared by hydrogenation of ...l,2-Bis(2,2'-bipyridinyl)ethylene(1) ligand was synthesized by Wittig-Horner reaction and 1, 2-Bis(2, 2'-bipyridinyl)ethane(2) ligand(which can be obtained via another route ) was prepared by hydrogenation of (1). The formation of complexes of (1) and (2) with copper (I) has been studied. The influence of the different bridge chains (CH =CH, CH2CH2) on complexation is discussed on the basis of 1H NMR spectra. Keywords Dipyridine aldehyde, Dipyridine derivative, Copper complex展开更多
基金supported by the National Natural Science Foundation of China (Nos. 20771054 and 20471026)Henan Tackle Key Problem of Science and Technology (Nos. 072102270030 and 072102270034)
文摘Utilizing N-[（4-carboxyphenyl）-sulfonyl]glycine （abbreviated as cbsglyH3）,a new cobalt complex [Co（cbsglyH）（bipy）2]3H2O （bipy = 2,2＇-bipyridine） has been synthesized under mild conditions and characterized by IR,elemental analysis,thermogravimetric analysis and X-ray diffraction analysis. It crystallizes in the monoclinic system,space group C2/c with a = 34.978（3）,b = 12.0437（11）,c = 20.0041（19） ,β = 122.2990（10）°,V = 7123.0（11） 3,Z = 8,C29H28CoN5O9S,Mr = 681.55,μ = 0.593 mm-1,Dc = 1.271 Kg/m3,F（000） = 2816,the final R = 0.0434 and wR = 0.1351. The title complex is a monomeric compound which is further assembled by intermolecular hydrogen bonds into a 3-D supramolecular network. Thermogravimetric analysis illustrates that this complex begins decomposing at 100 ℃ and decompounding completely at 560 ℃.
基金supported by grants from Provincial Key Projects of Anhui Natural Science Research in Universities(No.KJ2015A203)the Natural Science Foundation of Anhui Province(No.1408085MB40)Projects of Anhui Key Laboratory of Spin Electron and Nanomaterials,Suzhou University(No.2014YKF51)
文摘A novel zinc complex [Zn（BIB）（bdc）]n（1, BIB = 1,3-bis（imidazol-1-yl）benzene, bdc = 1,3-benzenedicarboxylate） has been synthesized in solvothermal conditions. The title complex was characterized by elemental analysis, IR spectra, thermal analysis, single-crystal and powder X-ray diffraction. The result proved that the alliance of BIB and aromatic carboxylic acids is good for the diversity of getatable structure. Complex 1 crystallizes in the monoclinic system of P2/c space group with a = 11.5591（10）, b = 9.6239（8）, c = 33.727（3）A, β = 103.816（3）°, V = 3643.4（5） A^3, Z = 8, μ = 1.385 mm^-1, F（000） = 1792, Dc = 1.603 g/cm^3 and Mr = 439.72 g/mol. Additionally, luminescent properties of complex 1 are also investigated and it shows good fluorescence.
基金financial supports from the NNSFC(20931006,U0934003,and 91122006)the NSF of Fujian Province(2011J01065)
文摘The synthesis,structure and luminescent property of a tetranuclear gold（Ⅰ）complex with doubly bridging diethyldithiocarbamate（Et2dtc）and 1,1-bis（diphenylphosphino）ethene（（Ph2P）2C=CH2）are described.The complex crystallizes in monoclinic space group C2/c with a=26.785（7）,b=25.654（6）,c=12.277（3）A,β=106.879（5）°,V=8073（4）A^3,Z=8,C31H32Au2F6NO3P2S2Sb,Mr=1222.32,Dc=2.011 g/cm^3,F（000）=4592,Rint=0.0529,T=293（2）K,μ=8.157 mm^（-1）,the final R=0.0464 and wR=0.1444 for 5804 observed reflections with I〉2σ（Ⅰ）.The intramolecular and intermolecular Au¨Au distances are 2.8670（9）and 3.2367（9）A,respectively.Weak emission appears at 517 nm at room temperature in the solid state.
基金Financially supported from National Natural Science Foundation of China(No.21403191)Natural Science Foundation of Guangdong Province(Nos.2014A030307010 and 2015A0303010406)+2 种基金Special funds for public welfare research and capacity building in Guangdong Province(No.2015A010105031)Zhanjiang Science Technology Project(No.2013B01054)Lingnan Normal University Science Research Foundation(Nos.L1301 and LZL1504)
文摘A novel mononuclear copper（Ⅱ） complex [Cu（bbmc）Cl_2]·DMF,where bbmc is 1,1-bis（1H-benzoimidazol-2-ylmethyl）cyclohexane,was synthesized and characterized by X-ray single-crystal structure analysis.The complex crystallizes in triclinic,space group P1 with a = 9.1088（5）,b = 11.0075（4）,c = 14.2326（6）A,α = 97.188（3）,β = 96.394（4）,γ = 111.430（4）°,V = 1298.73（10） A^3,Z = 2,D_c = 1.409 g/cm^3,μ（Mo Kα） = 1.074 mm^-1,F（000） = 572,S = 1.078,R = 0.0381 and w R = 0.0876 for 5593 observed reflections with I 〉 2σ（I）.The central Cu（Ⅱ） ion adopts a distorted tetrahedral geometry coordinated by two nitrogen atoms of the ligand and two chloride ions.The complex showed its thermal decomposition temperature up to 226 ℃ and exhibited an irreversible one-electron transfer process involving Cu^Ⅱ/Cu^I couple.
基金Project supported by College Programs SNIE(No.2014ZDKJ011)
文摘A new 3D cobalt metal-organic framework [C_7H_（13）N_2]_2[（CH_3COO）_2Co_7（oba）_5-（Hoba）_2（OH）_2]·H_2O has been synthesized under ionothermal conditions and characterized by elemental analysis, FT-IR, XRD, and TG. This complex crystallizes in monoclinic system, space group P21/c with a = 19.4499（4）, b = 10.8839（2）, c = 27.7796（5） ？, β = 104.467（2）o, V = 5694.22（19） ？~3, Z = 2, C_（116）H_（92）Co_7N_4O_（42）, M_r = 2626.45, D_c = 1.532 g/cm^3 , F（000） = 2682, μ = 1.085 mm-1, R = 0.0387 and wR = 0.1177. Its structure is characterized as a 3D open framework constructed by seven nuclear clusters [（CH_3COO）_Co_7（OH）_2] and the 4,4？-oxybisbenzoic acid ligand. The used ILs cations are located in the middle of the pore and compensate for the negative charges of framework. Furthermore, its fluorescence property has also been studied.
文摘Complex salt Co_2Cl_5(py)_5 (py=pyridine) was obtained by the reaction of CoCl_2·6H_2O with Bu_4NMnO_4 in pyridine in the presence of benzoic acid. It is monoclinic and crystallizes in space group P2_1/n, fw=690.64, a=28.652(5), b=14.108(4), c=7.424(3) ;β=90.09(1); V=3001(2)~3; Z=4, Dc=1.53g/cm^3. Final R factor is 0.041. The structure consists of a discrete cation [Co~ⅢCl_2(py)_4]^+ and an anion [Co~Ⅱ Cl_3(py)]^-. The Co~Ⅲ ion is coordinated by two Cl^- and four pyridine nitrogen atoms to form an octahedral geometry, and Co~Ⅱ is coordinated by three Cl^- and one pyridine nitrogen atom to form the apices of a tetrahedron. The variable-temperature magnetic susceptility measurement shows no magnet-exchange interaction between Co~Ⅲ and Co~Ⅱ ions.
基金the National Natural Science Foundation of China(No.42277138)the National Key Research and Development Program of China(Nos.2024YFF0506803 and 2024YFC2815400)+2 种基金the Fundamental Research Funds for the Central Universities(Nos.202441003 and 202513032)the Shandong Province National-Level Leading Talent Supporting Project(No.2022GJJLJRC-15)the European Commission(Nos.HORIZON MSCA-2024-PF-01,101200637)。
文摘0 INTRODUCTION Microplastics are defined as small plastic debris(1μm-5 mm),which have complex properties of widerange densities(0.05-2.3 g/cm^3),diverse shapes(e.g.,beads,fibers,foam and pellets)and low degradability(Harris,2020;Chubarenko et al.,2016).
基金supported by the National Natural Science Foundation of China(No.21571093)the Program for Science&Technology Innovation Talents in Universities of Henan Province(No.14HASTIT017)+1 种基金the Program for Innovative Research Team(in Science and Technology)in University of Henan Province(No.14IRTSTHN008)the Foundation of Education Committee of Henan Province(No.142300410301)
文摘Two new Co（Ⅱ） coordination polymers,{[Co_3（Hchda）_2（chda）_2（bpp）_2（H_2O）_2]}_n 1 and {[Co（chda）（bpe）（H_2O）]·3H_2O}_n 2（H_2chda = 1,1-cyclohexanediacetic acid,bpp = 1,3-bis（4-pyridinyl）propane and bpe = 1,2-bis（4-pyridinyl）ethylene）,were hydrothermally synthesized and then characterized by elemental analysis,IR spectroscopy,thermogravimetric analysis（TGA）,and single-crystal X-ray diffraction.Complex 1 possesses an infinite metal-organic layer based on triply bridged linear trinuclear subunits and complex 2 exhibits a square（4,4） grid layer with dangling lateral arms resulting from eight-membered rings above and below the layer.In addition,magnetic properties of complexes 1 and 2 are also given.
基金Project supported by Jordan University of Science and Technology Research Fund Project(2011/202)
文摘A Schiff base L [2-thiophenecarboxylic acid, 2-（2-pyridinylmethylene）hydrazide] with its lanthanide metal complexes was synthesized. These complexes were characterized by elemental analysis, molar conductivity measurements, spectral analysis（NMR, FT-IR, and UV-Vis）, luminescence and thermal gravimetric analysis. The Schiff base ligand was a tridentate chelate and coordinates to the central lanthanide ion with 1：2 metal：ligand ratio. The conductivity data showed a 1：1 electrolytic nature with a general formula [LnL_2（NO_3）_2]NO_3. The luminescence emission properties for Sm, Tb, and Eu complexes were observed and showed that the ligand L could absorb and transfer energy to Sm（III）, Tb（III） and Eu（III） ions. The complexes possessed a good antibacterial activity against different bacterial strains. In addition, the scavenging activity of the Ln（III） complexes on DPPH was concentration dependant and the complexes were significantly more efficient in quenching DPPH than the free Schiff base ligand.
基金Supported by the National Natural Science Foundation of China(No.20971065)the National Basic Research Program of China(No.2010CB923303)
文摘A new polymeric complex {[Cd2（bbmb）2（gt）2]＇（H2O）2}, （bbmb = 4,4＇-bis（benzimidazol-l-ylmethyl）biphenyl, H2gt = glutaric acid） has been obtained by hyclrothermal method and structurally characterized by elemental analysis, IR, XRD, TGA and single-crystal X-ray diffraction. The complex belongs to the triclinic system, space group P1 with a = 10.2417（15）, b = 13.752（2）, c = 22.201（3） A, a = 73.899（2）, β = 88.416（2）, y = 78.305（2）°, V = 2940.4（7） A3, Z = 2, C66H56Cd2N808, Mr = 1313.99, Dc = 1.484 g/cm3, F（000） = 1336 and μ = 0.787 mm-1, and features a 2D network. In the solid state at room temperature, the cadmium（Ⅱ） complex exhibits strong fluorescence absorption at 435 nm （λmax）.
基金Supported by the National High Technology Research and Development Program of China(863 Program)(2009AA01220)the National Natural Science Foundation of China(91118007)
文摘The popular single-factor complexity measure cannot comprehensively reflect program complexity and the existing hybrid complexity measure cannot express the interactive behaviors of programs. To treat these problems, in this paper, we propose a complexity measure based on program slicing（CMBPS）. CMPBS not only can evaluate factors which affect program complexity such as the length of the program, control flow, data flow and data types of output variables, but also can give expression of the interactive relation between programs. And we also prove that CMBPS satisfies all of Weyuker properties. Compared with the popular complexity measures, CMBPS is a well-structured complexity measure.
基金supported by the National Natural Science Foundation of China(Nos.21273101 and 21302082)Foundation for Science&Technology Innovation Talents in Henan province(Nos.2014HASTIT014 and 164100510012)+1 种基金Tackle Key Problem of Science and Technology Project of Henan Province,(No.14210 231 0483)Ministry of Science and Technology of China(973 Project,No.2014CB660804)
文摘One new Zn（Ⅱ） complex [Zn2（cptpy）2（tzba）（H2O）]·H2O（1, Hcptpy = 4-（4-carboxyphenyl）-2,2＇：4＇,4＇＇-terpyridine（Hcptpy）, H_2tzba = 4-（tetrazol-5-yl）benzenecarboxylic acid） has been synthesized and characterized by elemental analysis and single-crystal X-ray diffraction techniques. It is formulated as C52H36O8N10Zn2, crystallizes in monoclinic system, space group P21/c with α = 15.1599（13）, b = 28.083（2）, c = 10.9039（9） A, b = 97.517（8）o. V = 4602.3（6） A^3, Z = 4, Mr = 1059.68, Dc = 1.529 g/cm^3, F（000） = 2168 and μ = 1.112 mm^-1. The final R = 0.0831 and wR = 0.2143 for 8458 observed reflections with I 〉 2s（I）. The assembly of polyfunctional organic ligands Hcptpy and H_2tzba with Zn（II） atoms resulting in a rare example of double-edge ladders, which is further extended into a 3D supramolecular network via O–H…O/N hydrogen bonds. In addition, thermal gravimetric analysis（TGA） and PXRD patterns for 1 were studied. Photo luminescent property of 1 was also investigated.
基金Supported by the National Natural Science Foundation of China(No.51474086)Natural Science Foundation-Steel and Iron Foundation of Hebei Province(B2015209299)Undergraduate Innovation Programs of North China University of Science and Technology(No.X2015004)
文摘Two zinc（II） complexes, namely, [Zn（L1）Cl2]2 （1） and {[Zn（L2）（tbta）]·3H2O}n （2） （L1 = 1,3-bis（2-methylbenzimidazol-1-ylmethyl）benzene, H2tbta = tetrabromoterephthalic acid, L2 = 1,3-bis（2-methylbenzimidazol-1-yl）-2-propanol） have been successfully obtained under hydrothermal conditions. Complex 1 displays binuclear structure which is further extended into a 1D supramolecular chain through π–π stacking. Complex 2 features 2D （4,4） network based on L2/tbta2– double linker. The thermal stability, fluorescence properties and catalytic activities of two complexes for degradation of Methyl orange in a Fenton-like process were discussed.
基金the National Natural Science Foundation of China(21501178)Natural Science Funds of Fujian Province(No.2014H0055)for financial support of this work
文摘Two novel complexes, namely {[Cd（AIP）（4,4＇-bpy）]·1.3DMF}n（1） and [Cd（AIP）（2,2＇- bpy）]n（2）, have been synthesized through solvothermal reaction（H2AIP = 5-aminoisophthalic acid, 2,2＇-bpy = 2,2＇-bipyridine, 4,4＇-bpy = 4,4＇-bipyridine, and DMF = N,N＇-dimethylformamide） and structurally determined by single-crystal X-ray diffraction. Complex 1 shows a three-dimensional（3D） layer-pillar framework with rectangular channels, while complex 2 displays a two-dimensional（2D） wave net architecture. Furthermore, 1 and 2 were characterized by elemental analysis, infrared spectra（IR）, thermal gravimetric analyses（TGA） and fluorescence measurements. The luminescent properties of 1 dispersed in various organic solvents have been investigated systematically, demonstrating high selectivity for acetone via the fluorescence quenching effect.
基金supported by the National Natural Science Foundation of China (Nos. 20971045, 21271073)
文摘A new material for both magnetic coupling and electrocatalytic hydrogen generation based on a copper complex,[（HL）CuCl-CuCl（HL）]HCl 1 is prepared by the reaction of 2-（pyridylmethyl）amino-N,N-bis（2-methylene-4,6-difluorophenol）（H2L） and CuCl2·2H2O.In solid,complex 1 is built from two copper units（[（HL）CuCl]）,and exhibits an antiferromagnetic exchange interaction between copper（Ⅱ） ions（J=-160cm^-1）.In liquid,1 can electrocatalyze hydrogen generation both from acetic acid with a turnover frequency（TOF） of 16.3 moles of hydrogen per mole of catalyst per hour at an overpotential（OP）of 941.6 mV（in DMF）,and a neutral buffer with a TOF of 1415.6 moles of hydrogen per mole of catalyst per hour at an OP of 787.6 mV.
基金supported by the National Natural Science Foundation of China(51172232)
文摘A cuprous mononuclear copper complex [Cu（adpypz）CH3CNPPh3]BF4·CH2Cl2（1, adpypz = 9,9-dimethyl-10-（6-（3-phenyl-1H-pyrazol-1-yl）pyridin-2-yl）-9,10-dihydroacridine） was synthesized and characterized by Elemental Analysis, NMR, UV-Vis and X-ray single-crystal structure analysis. It crystallizes in triclinic, space group P1 with a = 11.3388（4）, b = 13.4569（4）, c = 16.2561（6） ？, α = 97.154（3）, β = 92.187（3）, γ = 114.119（4）°, V = 2235.38（13） ？3, Z = 2, Mr = 967.12, Dc = 1.437 g/cm^3, F（000） = 996, μ = 2.62 mm^–1, GOOF = 1.031, the final R = 0.0417, and w R = 0.1024 for 8043 observed reflections with I 〉 2σ（I）. The Cu（I） atoms in the complex are four-coordinated and adopt a tetrahedral coordination geometry. In the solid state, the complex exhibits bluish-green photoluminescence with emission peaks λmax = 492 nm（1）, lifetimes 235 μs and quantum yields（ф = 0.279） at room temperature. The studies of varied temperature emission spectra and decay behaviours of the complex indicate that the complex displays thermally activated delayed fluorescence（TADF） at room temperature. The results of the experimental and DFT calculations suggest that the emission in the solid state originates from the ILCT excited states.
基金Supported by the Natural Science Foundation of Mongolian Autonomous Region,China(No.2014MS0215)
文摘A new dinuclear iron（Ill） complex has been synthesized and structurally charac- terized by X-ray crystallography： [Fem2（L）（C6HsCOO）（SO4）（CH3OH）2]·CH3CN＇CH3OH （1, H3L = N,N＇-bis（salicylidene）q,3-diamino-2-propanol）. Complex 1 belongs to orthorhombic space group Pna21 with a= 11.4400（8）, b = 22.9705（2）, c = 12.5712（9）A, V= 3303.5（4）A3, Z= 4, F（000） = 1576, Dc= 1.531 g·cm-3, Mr= 761.36,μ = 1.007 mm-1, S = 1.014, the final R= 0.0505 and wR= 0.1018. The crystal packing is stabilized by intermolecular O-H…O hydrogen bonds, forming an extended one-dimensional chain structure. The temperature dependence of magnetic susceptibility measurement shows that antiferromagnetic interaction is propagated between the metal centers. Fit as dinuclear arrangement gave parameters ofJ= 19.7 cm-1, g = 1.89 and R2 = 0.9999.
基金Supported by the Construct Program of the Key Discipline in Hunan ProvinceKey Project of Industrial Science and Technology Support of Hengyang City(2015KG23)
文摘A new nickel（Ⅱ） complex Ni2（L）2（2,2＇-bipy）2·5.5H2O with methy-bicycle[2.2.1]hept-5-ene-2,3-dicarboxylic acid（H2L） and 2,2？-bipyridine（2,2＇-bipy） as ligands has been synthesized in the mixed solvent DMF and water（v：v = 5：2）. It crystallizes in the triclinic space group P1 with a = 10.414（2）, b = 12.884（3）, c = 16.176（4） A, α = 70.715（5）, β = 80.599（5）, γ = 77.383（6）°, V = 1989.4（8） A^3, Dc = 1.531 g/cm^3, Z = 2, F（000） = 958, GOOF = 1.028, the final R = 0.0808 and w R = 0.2036. The crystal structure shows that the whole molecule consists of two independent dinuclear units, in which two nickel ions are bridged by two μ2-η1：η0 3-carboxylate groups of L2- anions. The coordination environment of Ni（Ⅱ） ion is Ni N2O3, giving a distorted square pyramidal geometry. The thermal stability and electrochemical properties of the complex were investigated.
文摘Three white crystalline aminopolyphosphonic acids, DTHMP, TTHMP and TPHMP were synthesized by a modified Mannich reaction under gentle conditions. The products were isolated and purified with a SP-Sephadex C-25 column. The acid-base and complexing properties of three aminopolyphosphonic acids with rare earth ions were investigated by means of potentiometric titration in aqueous medium at (25 +/- 0.1) degrees C and ionic strength I = 0.1 mol/L KNO3. The successive protonation constants of ligands and the formation constants of complexes with rare earth elements were obtained. The results show a double-double effect for lgK(MHiL) against atomic number of lanthanide. The properties are advantageous for the separation of the rare earth elements.
文摘l,2-Bis(2,2'-bipyridinyl)ethylene(1) ligand was synthesized by Wittig-Horner reaction and 1, 2-Bis(2, 2'-bipyridinyl)ethane(2) ligand(which can be obtained via another route ) was prepared by hydrogenation of (1). The formation of complexes of (1) and (2) with copper (I) has been studied. The influence of the different bridge chains (CH =CH, CH2CH2) on complexation is discussed on the basis of 1H NMR spectra. Keywords Dipyridine aldehyde, Dipyridine derivative, Copper complex
