A new cadmium（Ⅱ） polymer [Cd（tdc）（Phen）]n 1 （H2tdc = thiophene-3,4-dicar-boxylic acid, Phen = 1,10-phenanthroline） was synthesized under hydrothermal conditions. The compound crystallizes in the triclinic sys...A new cadmium（Ⅱ） polymer [Cd（tdc）（Phen）]n 1 （H2tdc = thiophene-3,4-dicar-boxylic acid, Phen = 1,10-phenanthroline） was synthesized under hydrothermal conditions. The compound crystallizes in the triclinic system, space group P , with a = 7.3150（10）, b = 10.3598（14）, c = 10.8784（15） , α = 82.2740（10）, β = 72.9730（10）, γ = 80.236（2）°, V = 773.68（18） 3, Z = 2, Mr = 462.74, Dc = 1.986 Mg/m3, μ = 1.58 mm-1, F（000） = 456, the final R = 0.0218 and wR = 0.0465 for 3361 observed reflections with Ⅰ 〉 2σ（Ⅰ）. The compound presents a one-dimensional （1-D） double-stranded structure and exhibits fluorescent emission at room temperature. Furthermore, infrared spectroscopy, elemental analyses, thermogravimetric analysis and powder X-ray diffraction properties of the compound are also investigated.展开更多
Two new metal-organic complexes [Cd2（1,4-BDC）（4-pytyp）（H2O）4]·（1,4-BDC）（1） and [Cu2（1,4-BDC）（4-pytyp）2（H2O）2]·（1,4-BDC）·8H2O（2）（4-pytyp = 4＇-（4＇＇-pyridyl）-2,2＇：6＇,2＇＇-terp...Two new metal-organic complexes [Cd2（1,4-BDC）（4-pytyp）（H2O）4]·（1,4-BDC）（1） and [Cu2（1,4-BDC）（4-pytyp）2（H2O）2]·（1,4-BDC）·8H2O（2）（4-pytyp = 4＇-（4＇＇-pyridyl）-2,2＇：6＇,2＇＇-terpyridine, 1,4-H2 BDC = 1,4-benzenedicarboxylic acid） have been synthesized under hydrothermal conditions and characterized by elemental analysis, infrared analysis and X-ray single-crystal diffraction. The scrutiny of single-crystal structure reveals that complex 1 forms to a 3D supramolecular network linked by π-π stacking interactions and hydrogen bonds. X-ray diffraction analysis reveals that complex 2 exhibits a 3D supramolecular network linked through complicated hydrogen bonds. The thermogravimetric analysis and photoluminescent properties of 1 and 2 are discussed in detail.展开更多
The reaction of 4-hydroxybenzoic acid (H2L),4, 4-diaminodiphenylmethane (DADPM) and Cd(NO3)2?H2O in methane/water gave rise to a seven-coordinate Cd(Ⅱ) complex [Cd2(HL)4(H2O)6]?H2O which has been characterized by sin...The reaction of 4-hydroxybenzoic acid (H2L),4, 4-diaminodiphenylmethane (DADPM) and Cd(NO3)2?H2O in methane/water gave rise to a seven-coordinate Cd(Ⅱ) complex [Cd2(HL)4(H2O)6]?H2O which has been characterized by single-crystal X-ray diffraction. The complex crystallizes in the orthorhombic system, space group Pna21 with unit cell parameters: a = 10.3352(3), b = 12.0481(3), c = 28.2016(1) ? V = 3511.65(13) 3, Z = 4, C28H36Cd2O20, Mr = 917.37, Dc = 1.735 g/cm3, F(000) = 1840, (MoK? = 1.29mm-1. The final R and wR are 0.0536 and 0.1086 for 4898 observed reflections with I ≥ 4(I). The Cd(Ⅱ) is seven-coordinated in a distorted pentagonal bipyramidal geometry. The inter-molecular hydrogen bonds lead to the formation of a two-dimensional layer structure.展开更多
A new bicadmium(??) complex [Cd2L](ClO4)2?1.25H2O (C28H35Cd2Cl4N6O13.25) was synthesized and characterized by X-ray diffraction and ES mass spectral analyses. It crystallizes in the triclinic system, space gro...A new bicadmium(??) complex [Cd2L](ClO4)2?1.25H2O (C28H35Cd2Cl4N6O13.25) was synthesized and characterized by X-ray diffraction and ES mass spectral analyses. It crystallizes in the triclinic system, space group P1 with a = 15.630(3), b = 15.990(3), c = 16.330(3) ?, α = 89.90(3), β = 68.87(3), γ = 87.94(3)o, V = 3804.1(13) ?3, Mr = 1034.22, Z = 4, F(000) = 2060, Dc = 1.806 g/cm3, T = 293(2) K, μ = 1.468 mm-1 and λ = 0.71073 ?. The structure was refined to R = 0.0779 and wR = 0.1960 for 7034 observed reflections with I > 2σ(I).展开更多
Two novel complexes, [Cd2（BMQU）2Cl4] （1） and [Ni（BMQU）2HPO4]·1.5H2O （2） （BMQU = 2-（2-benzimidazolyl）quinoline）, were synthesized by the hydrothermal method and characterized by elemental analysis, IR,...Two novel complexes, [Cd2（BMQU）2Cl4] （1） and [Ni（BMQU）2HPO4]·1.5H2O （2） （BMQU = 2-（2-benzimidazolyl）quinoline）, were synthesized by the hydrothermal method and characterized by elemental analysis, IR, and TG-DTG. The crystal structures were determined by single-crystal X-ray diffraction. Both 1 and 2 crystallize in the triclinic system, space group P . The data for 1： a = 0.8342（7）, b = 0.9226（9）, c = 1.0646（8） nm, α = 90.819（2）, β = 97.466（2）, γ = 98.280（2）°. The Cd（Ⅱ） is coordinated with three chlorine atoms and two nitrogen atoms of a BMQU molecule, generating a distorted square-pyramidal geometry. The dinuclear Cd（Ⅱ） complex is formed by two chlorine bridge bonds, and the one-dimensional chain structure is constructed with the hydrogen bond N-H…Cl and π-π stacking interaction. The data for 2： a = 1.2251（1）, b = 1.2451（1）, c = 1.2868（1） nm, α = 107.510（2）, β = 98.630（1）, γ = 109.921（2）°. The Ni（Ⅱ） is coordinated with four nitrogen atoms of two BMQU molecules and two oxygen atoms of a HPO42-, forming a distorted-octahedral geometry. The two-dimensional layer structure is formed by the hydrogen bonds and π-π stacking interaction between neighboring molecules. Complex 1 shows a strong blue fluorescence emission （λmax= 456 nm） at solid state.展开更多
A new cadmium complex [Cd（phen）3]·（ClO4）2·（α-FRA）-（H2O）3 was prepared by self-assembly of α-furoic acid, 1,10-phenanthroline （phen）, and cadmium perchlorate. It crystallizes in the monoclinic sys...A new cadmium complex [Cd（phen）3]·（ClO4）2·（α-FRA）-（H2O）3 was prepared by self-assembly of α-furoic acid, 1,10-phenanthroline （phen）, and cadmium perchlorate. It crystallizes in the monoclinic system, space group P21/n, with a = 1.28130（15）, b = 2.5957（3）, c = 1.35449（16） nm, β = 109.395（2）°, V = 4.2492（9） nm^3, Dc = 1.491 g/cm^3, Z = 4, F（000） = 1926, GOOF = 1.023, the final R = 0.0729 and wR = 0.2086. The crystal structure analysis indicates that the cadmium ion is coordinated with six nitrogen atoms from six 1,10-phenanthroline molecules, giving a distorted octahedral coordination geometry. The cyclic voltametric behavior of the complex was also investigated.展开更多
A polynuclear complex [Cd（endc）（H20）]n·nH2O （endc = endo-norbornene-cis- 5,6-dicarboxylate anion） has been synthesized by the hydrothermal reaction of cadmium nitrate tetrahydrate with endo-norbornene-cis-5...A polynuclear complex [Cd（endc）（H20）]n·nH2O （endc = endo-norbornene-cis- 5,6-dicarboxylate anion） has been synthesized by the hydrothermal reaction of cadmium nitrate tetrahydrate with endo-norbornene-cis-5,6-dicarboxylic acid in 1：1 molar ratio, and structurally characterized by single-crystal X-ray diffraction. It crystallizes in monoclinic, space group P21/c with α = 1.16471（7）, b = 0.95334（7）, c = 0.91109（9） nm, Z= 4, V= 1.01035（14） nm^3, D, = 2.160 g/cm^3,μ = 2.172 mm^-1, F（000） = 648, R = 0.0302 and wR = 0.0752. According to structural analysis, each Cd（II） ion is coordinated to six O atoms from three endc anions and one water molecule, giving a distorted octahedral geometry. Two- dimensional layer arrangement of the title complex is constructed from the bridging nature of endc. It is worth notice that adjacent two-dimensional layers are joined together to form a three-dimensional supramolecular framework via intermolecular hydrogen bonding interactions.展开更多
Ten male buffalo calves were randomly allotted into five groups of two each. Four groups were fed with cadmium, molybdenum, cadmium-molybdenum, and copper-cadmium-molybdenum respectively for 130 days to determine the ...Ten male buffalo calves were randomly allotted into five groups of two each. Four groups were fed with cadmium, molybdenum, cadmium-molybdenum, and copper-cadmium-molybdenum respectively for 130 days to determine the elements' metabolic interactions in calves. These results indicated that cadmium and molybdenum could increase the accumulation of molybdenum and cadmium in liver and kidneys in buffalo calves, but copper could not. reduce to normal the levels of molybdenum and cadmium in liver and kidneys caused by cadmium-molybdenum. In addition, we found the copper concentrations in liver and kindeys was significantly greater in treatment calves than in controls.展开更多
A new cadmium（Ⅱ） nitrite complex Cd2（H2C3PIm）2（BDC）（NO2）2（1,H2C3PIm = 2,2＇-（1,3-propanediyl）bis（1H-benzimidazole）,H2BDC = 1,4-benzenedicarboxylic acid） has been synthesized by solvothermal reaction in ...A new cadmium（Ⅱ） nitrite complex Cd2（H2C3PIm）2（BDC）（NO2）2（1,H2C3PIm = 2,2＇-（1,3-propanediyl）bis（1H-benzimidazole）,H2BDC = 1,4-benzenedicarboxylic acid） has been synthesized by solvothermal reaction in formamide,and its structure（C42H36Cd2N10O8,Mr = 1033.61） was determined by single-crystal X-ray diffraction analysis.The crystal belongs to the monoclinic system,space group P21/n with a = 0.9859（5）,b = 0.8936（5）,c = 2.3188（5） nm,β = 97.576（5）°,V = 2.025（16） nm3,Z = 2,Dc = 1.695 g/cm3,μ（MoKα） = 1.118 mm-1,F（000） = 1036,S = 1.017,the final R = 0.0304 and wR = 0.0752 for 3761 reflections with I 〉 2σ（I）.The centrosymmetric complex 1 contains a dimer in which two distorted octahedral Cd（II） centers are bridged by BDC ligand and chelated by H2C3PIm.The units of the complex are linked via weak N-H···O hydrogen bonds between the nitrito and the BDC ligands,leading to the formation of a 1D zigzag chain along the b axis.The π-π packing interactions contribute to the formation of a three-dimensional supramolecular architecture.The complex exhibits strong photoluminescence at room temperature.展开更多
A new cadmium（Ⅱ） coordination polymer,namely,[KCd2（edta）I]n（1,H4edta = ethylenediaminetetraacetic acid）,has been prepared and structurally characterized by single-crystal X-ray diffraction.Crystallographic data...A new cadmium（Ⅱ） coordination polymer,namely,[KCd2（edta）I]n（1,H4edta = ethylenediaminetetraacetic acid）,has been prepared and structurally characterized by single-crystal X-ray diffraction.Crystallographic data for 1：C10H12Cd2IKN2O8,Mr = 679.02,monoclinic,space group P21/n,a = 9.870（5）,b = 8.989（4）,c = 19.082（10） ,β = 104.581（10）o,V = 1638.5（13） 3,Z = 4,Dc = 2.753 g/cm3,μ = 4.776 mm-1,F（000） = 1272,the final R = 0.0473 and wR = 0.1311 for 2846 observed reflections with I 〉 2σ（I）.Polymer 1 features a 2-D layered structure,in which each edta4-ligand chelates/bridges five adjacent six-/seven-coordinated Cd（Ⅱ） centers with all ten donors（eight oxygen and two nitrogen） involved with coordination.Additional iodide I-ions as counterions are bound to the Cd（Ⅱ） centers in a terminal mode and the potassium K＋ ions are located in the layers and surrounded by O and I atoms from neighboring environment.The thermal stability of 1 has been discussed.展开更多
Two cadmium（Ⅱ） compounds linked by a flexible dipyridyl ligand {[Cd2（Hbpma） Cl5（H2O）]·2H2O}n 1 and [Cd（Hbpma）Cl（H2O）2]2·2SO4·3H2O 2 （bpma = N,N-bis（3-pyridylmethyl）amine） have been synthe...Two cadmium（Ⅱ） compounds linked by a flexible dipyridyl ligand {[Cd2（Hbpma） Cl5（H2O）]·2H2O}n 1 and [Cd（Hbpma）Cl（H2O）2]2·2SO4·3H2O 2 （bpma = N,N-bis（3-pyridylmethyl）amine） have been synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in triclinic, space group P with a = 9.5612（6）, b = 11.3401（7）, c = 11.5069（12）, α = 112.8540（10）, β = 106.5330（10）, γ = 101.6680（10）°, V = 1030.77（14）3, C12H20Cd2Cl5N3O3, Mr = 656.36, Z = 2, Dc = 2.115 g/cm3, μ（MoKα） = 2.727 mm–1, F（000） = 636, S = 1.059, the final R = 0.0319 and wR = 0.0822 for 3443 observed reflections （I 2σ（I））. For complex 2, it belongs to triclinic, space group P with a = 10.9487（4）, b = 11.4197（4）, c = 15.4288（5）, α = 94.7470（10）, β = 104.1000（10）, γ = 104.42°, V = 1790.76（11）3, C24H42Cd2Cl2N6O15S2, Mr = 1014.46, Z = 2, Dc = 1.881 g/cm3, μ（MoKα） = 1.529 mm–1, F（000） = 1020, S = 1.050, the final R = 0.0178 and wR = 0.0451 for 6026 observed reflections （I 2σ（I））. Complex 1 is found to have tetranuclear Cd（Ⅱ） clusters which are bridged by the protonated bpma ligands leading to one-dimensional coordination polymers, whereas complex 2 consists of binuclear Cd（Ⅱ） structures linked by the protonated bpma ligands. Both complexes are assembled into three-dimensional supramolecular structures through hydrogen bonding interactions.展开更多
A new cadmium（Ⅱ） complex[Cd（Hminic）（IP）]n（1,Hminic = 2-hydroxy-6-methylisonicotinic acid,IP = imidazo[4,5-f]-l,10-phenanthroline）,has been synthesized by the reaction of a Hminic and auxiliary N-containing li...A new cadmium（Ⅱ） complex[Cd（Hminic）（IP）]n（1,Hminic = 2-hydroxy-6-methylisonicotinic acid,IP = imidazo[4,5-f]-l,10-phenanthroline）,has been synthesized by the reaction of a Hminic and auxiliary N-containing ligands with Cd（Ⅱ） ion under hydrothermal conditions.The complex was studied by elemental analysis,IR spectroscopy and X-ray crystallography.It is formulated as C（20）H（13）CdN5O3,crystallizes in monoclinic system,space group C2/c with α=9.6764（8）,b = 26.767（2）,c = 14.1332（11） A and β= 97.4510（10）°.V= 3629.7（5） A^3,Z = 8,Mr=483.75,Dc = 1.770 g/cm^3,F（000） = 1484 and μ= 1.237 mm^（-1）.The final refinement gave R = 0.0309 and wR = 0.0703 for 4151 reflections with I 〉2σ（I）.In the structure of 1,two Cd（Ⅱ） atoms are joined by a pair of μ2-hydroxyl oxygen atoms giving rise to a dinuclear Cd（Ⅱ） unit which is bridged by Hminic linkers to form a 1D ladder-like polymer chain.The chelating ligand IP coordinated to the Cd（Ⅱ） atom,and alternately attached to both sides of the ladder-like polymer chain.Adjacent chains are further bound together by strong intermolecular hydrogen bonds and face-to-face π…πinteractions,resulting in the formation of a 3D supramolecular architecture.Furthermore,the thermal stability and luminescent properties of this complex and the free ligands have been investigated.展开更多
A new dinuclear cadmium（Ⅱ） complex,[Cd（NPHSNPAB）（H_2O）_2（CH_3CH_2OH）]_2（1）,was synthesized by the hydrothermal reaction of N-phenyl-2-[2-hydroxyl-3-sulfo-5-nitrophenylazo]butadiene-1,3（NPHSNPAB） and Cd（N...A new dinuclear cadmium（Ⅱ） complex,[Cd（NPHSNPAB）（H_2O）_2（CH_3CH_2OH）]_2（1）,was synthesized by the hydrothermal reaction of N-phenyl-2-[2-hydroxyl-3-sulfo-5-nitrophenylazo]butadiene-1,3（NPHSNPAB） and Cd（NO_3）_2·4H_2O,and characterized by elemental analysis,infrared,UV-visible,fluorescence,thermal behavior and single-crystal X-ray diffraction. For this complex： C_（36）H_（42）Cd_2N_8O_（22）S_2,Mr = 1227.74,triclinic system,space group P1,a = 7.555（9）,b = 12.006（14）,c = 13.943（16） ？,α = 67.955（2）,β = 88.573（2）,γ = 77.550（2）o,V = 1142.5（2） ？~3,Z = 2,Dc = 1.784 g/cm^3,λ = 0.71073 ？,F（000） = 620,S = 1.125,R = 0.0460 and w R = 0.1159 for 3949 observed reflections with I 〉 2（I）. X-ray diffraction analysis reveals that the central Cd（Ⅱ） ion is bound by six oxygen atoms,forming a slightly distorted octahedral geometry. Density functional theory of complex 1 was studied. Noticeably,the application of 1 on metallic yarn got good effect.展开更多
The title complex 1,[Cd 4 Cu 2 （pdc） 4 （H 2 O） 14 ] （H 3 pdc=3,5-pyrazoledicarboxylic acid）,has been solvothermally synthesized and structurally characterized by single-crystal X-ray diffraction.Complex 1 crysta...The title complex 1,[Cd 4 Cu 2 （pdc） 4 （H 2 O） 14 ] （H 3 pdc=3,5-pyrazoledicarboxylic acid）,has been solvothermally synthesized and structurally characterized by single-crystal X-ray diffraction.Complex 1 crystallizes in triclinic,space group P1 with a=0.67235（10）,b=1.27935（18）,c=1.28569（17） nm,α=112.633（2）,β=102.971（3）,γ=97.089（2）o,V=0.9673（2） nm 3,C 20 H 32 Cd 4 Cu 2 N 8 O 30,M r=1441.22,D c=2.474 g/cm 3,μ（MoKα）=3.356 mm 1,F（000）=698,S=1.003,Z=1,the final R=0.0471 and wR=0.0748 for I 2σ（Ⅰ）.In 1,two deprotonated 3,5-pyrazoledicarboxylic acids （pdc 3）,one copper（Ⅱ） ion and one cadmium（Ⅱ） ion firstly form a pyrazole-bridged Cu II Cd II dinuclear unit,two of which related by an inversion center are connected by another two cadmium（Ⅱ） ions through chelating carboxylate groups to construct the copper（Ⅱ）-cadmium（Ⅱ） heterometallic hexanuclear complexes.Plenty of hydrogen bond interactions existing in the system further lead to a three-dimensional （3D） supramolecular framework.展开更多
A new method for determination of Cu（Ⅱ） by DDCT chelating resin preconcentration and thin layer resin phase spectrophotometry was developed. The method has a high sensitivity （ε455= 3.6×10^5L/mol·cm）, ...A new method for determination of Cu（Ⅱ） by DDCT chelating resin preconcentration and thin layer resin phase spectrophotometry was developed. The method has a high sensitivity （ε455= 3.6×10^5L/mol·cm）, which is 33 times higher than that of liquid phase spectrophotometry. It has a good selectivity （most coexisting ions could not influence determination） and an ideal precision [30μg Cu（Ⅱ）, n=6, RSD= l.67%]. The content of Cu（Ⅱ） in water, high purity rare earth and its oxide was determined. The detection limit of Cu（Ⅱ） is 5.3μg/L , and the linear range is 0-7.2μg/ml. The result is satisfactory.展开更多
基金supported by the National Natural Science Foundation of China (No. 21172105)the Foundation of the Education Department of Henan Province (No. 2011A150021)
文摘A new cadmium（Ⅱ） polymer [Cd（tdc）（Phen）]n 1 （H2tdc = thiophene-3,4-dicar-boxylic acid, Phen = 1,10-phenanthroline） was synthesized under hydrothermal conditions. The compound crystallizes in the triclinic system, space group P , with a = 7.3150（10）, b = 10.3598（14）, c = 10.8784（15） , α = 82.2740（10）, β = 72.9730（10）, γ = 80.236（2）°, V = 773.68（18） 3, Z = 2, Mr = 462.74, Dc = 1.986 Mg/m3, μ = 1.58 mm-1, F（000） = 456, the final R = 0.0218 and wR = 0.0465 for 3361 observed reflections with Ⅰ 〉 2σ（Ⅰ）. The compound presents a one-dimensional （1-D） double-stranded structure and exhibits fluorescent emission at room temperature. Furthermore, infrared spectroscopy, elemental analyses, thermogravimetric analysis and powder X-ray diffraction properties of the compound are also investigated.
基金Supported by the Program for New Century Excellent Talents in University(NCET-10-0176)the Natural Science Foundation of Jilin Province(No.20130521019JH)the fund of Jilin Provincial Education Department of China(No.2014154)
文摘Two new metal-organic complexes [Cd2（1,4-BDC）（4-pytyp）（H2O）4]·（1,4-BDC）（1） and [Cu2（1,4-BDC）（4-pytyp）2（H2O）2]·（1,4-BDC）·8H2O（2）（4-pytyp = 4＇-（4＇＇-pyridyl）-2,2＇：6＇,2＇＇-terpyridine, 1,4-H2 BDC = 1,4-benzenedicarboxylic acid） have been synthesized under hydrothermal conditions and characterized by elemental analysis, infrared analysis and X-ray single-crystal diffraction. The scrutiny of single-crystal structure reveals that complex 1 forms to a 3D supramolecular network linked by π-π stacking interactions and hydrogen bonds. X-ray diffraction analysis reveals that complex 2 exhibits a 3D supramolecular network linked through complicated hydrogen bonds. The thermogravimetric analysis and photoluminescent properties of 1 and 2 are discussed in detail.
基金This work was financially supported by the National Natural Science Foundation of China the Key Project of Chinese Academy of Sciences
文摘The reaction of 4-hydroxybenzoic acid (H2L),4, 4-diaminodiphenylmethane (DADPM) and Cd(NO3)2?H2O in methane/water gave rise to a seven-coordinate Cd(Ⅱ) complex [Cd2(HL)4(H2O)6]?H2O which has been characterized by single-crystal X-ray diffraction. The complex crystallizes in the orthorhombic system, space group Pna21 with unit cell parameters: a = 10.3352(3), b = 12.0481(3), c = 28.2016(1) ? V = 3511.65(13) 3, Z = 4, C28H36Cd2O20, Mr = 917.37, Dc = 1.735 g/cm3, F(000) = 1840, (MoK? = 1.29mm-1. The final R and wR are 0.0536 and 0.1086 for 4898 observed reflections with I ≥ 4(I). The Cd(Ⅱ) is seven-coordinated in a distorted pentagonal bipyramidal geometry. The inter-molecular hydrogen bonds lead to the formation of a two-dimensional layer structure.
基金This project was supported by the National Natural Science Foundation of China(No.50372028)
文摘A new bicadmium(??) complex [Cd2L](ClO4)2?1.25H2O (C28H35Cd2Cl4N6O13.25) was synthesized and characterized by X-ray diffraction and ES mass spectral analyses. It crystallizes in the triclinic system, space group P1 with a = 15.630(3), b = 15.990(3), c = 16.330(3) ?, α = 89.90(3), β = 68.87(3), γ = 87.94(3)o, V = 3804.1(13) ?3, Mr = 1034.22, Z = 4, F(000) = 2060, Dc = 1.806 g/cm3, T = 293(2) K, μ = 1.468 mm-1 and λ = 0.71073 ?. The structure was refined to R = 0.0779 and wR = 0.1960 for 7034 observed reflections with I > 2σ(I).
基金Supported by the Natural Science Foundation of Education Department of Henan Province (No. 2011B150025)
文摘Two novel complexes, [Cd2（BMQU）2Cl4] （1） and [Ni（BMQU）2HPO4]·1.5H2O （2） （BMQU = 2-（2-benzimidazolyl）quinoline）, were synthesized by the hydrothermal method and characterized by elemental analysis, IR, and TG-DTG. The crystal structures were determined by single-crystal X-ray diffraction. Both 1 and 2 crystallize in the triclinic system, space group P . The data for 1： a = 0.8342（7）, b = 0.9226（9）, c = 1.0646（8） nm, α = 90.819（2）, β = 97.466（2）, γ = 98.280（2）°. The Cd（Ⅱ） is coordinated with three chlorine atoms and two nitrogen atoms of a BMQU molecule, generating a distorted square-pyramidal geometry. The dinuclear Cd（Ⅱ） complex is formed by two chlorine bridge bonds, and the one-dimensional chain structure is constructed with the hydrogen bond N-H…Cl and π-π stacking interaction. The data for 2： a = 1.2251（1）, b = 1.2451（1）, c = 1.2868（1） nm, α = 107.510（2）, β = 98.630（1）, γ = 109.921（2）°. The Ni（Ⅱ） is coordinated with four nitrogen atoms of two BMQU molecules and two oxygen atoms of a HPO42-, forming a distorted-octahedral geometry. The two-dimensional layer structure is formed by the hydrogen bonds and π-π stacking interaction between neighboring molecules. Complex 1 shows a strong blue fluorescence emission （λmax= 456 nm） at solid state.
基金Supported by the construct program of the key discipline in hunan provincethe Research Award Fund for the Outstanding Young Teachers of Hengyang Normal University (2006)
文摘A new cadmium complex [Cd（phen）3]·（ClO4）2·（α-FRA）-（H2O）3 was prepared by self-assembly of α-furoic acid, 1,10-phenanthroline （phen）, and cadmium perchlorate. It crystallizes in the monoclinic system, space group P21/n, with a = 1.28130（15）, b = 2.5957（3）, c = 1.35449（16） nm, β = 109.395（2）°, V = 4.2492（9） nm^3, Dc = 1.491 g/cm^3, Z = 4, F（000） = 1926, GOOF = 1.023, the final R = 0.0729 and wR = 0.2086. The crystal structure analysis indicates that the cadmium ion is coordinated with six nitrogen atoms from six 1,10-phenanthroline molecules, giving a distorted octahedral coordination geometry. The cyclic voltametric behavior of the complex was also investigated.
基金This work was supported by the National Natural Science Foundation of China (No. 20571057)
文摘A polynuclear complex [Cd（endc）（H20）]n·nH2O （endc = endo-norbornene-cis- 5,6-dicarboxylate anion） has been synthesized by the hydrothermal reaction of cadmium nitrate tetrahydrate with endo-norbornene-cis-5,6-dicarboxylic acid in 1：1 molar ratio, and structurally characterized by single-crystal X-ray diffraction. It crystallizes in monoclinic, space group P21/c with α = 1.16471（7）, b = 0.95334（7）, c = 0.91109（9） nm, Z= 4, V= 1.01035（14） nm^3, D, = 2.160 g/cm^3,μ = 2.172 mm^-1, F（000） = 648, R = 0.0302 and wR = 0.0752. According to structural analysis, each Cd（II） ion is coordinated to six O atoms from three endc anions and one water molecule, giving a distorted octahedral geometry. Two- dimensional layer arrangement of the title complex is constructed from the bridging nature of endc. It is worth notice that adjacent two-dimensional layers are joined together to form a three-dimensional supramolecular framework via intermolecular hydrogen bonding interactions.
文摘Ten male buffalo calves were randomly allotted into five groups of two each. Four groups were fed with cadmium, molybdenum, cadmium-molybdenum, and copper-cadmium-molybdenum respectively for 130 days to determine the elements' metabolic interactions in calves. These results indicated that cadmium and molybdenum could increase the accumulation of molybdenum and cadmium in liver and kidneys in buffalo calves, but copper could not. reduce to normal the levels of molybdenum and cadmium in liver and kidneys caused by cadmium-molybdenum. In addition, we found the copper concentrations in liver and kindeys was significantly greater in treatment calves than in controls.
基金supported by the research grant of Phytochemistry Key Laboratory of Shaanxi Province (No.11JS006,11JS007)the Scientific Research Fund of shaanxi Provincial Education Department (No.11JK0603)
文摘A new cadmium（Ⅱ） nitrite complex Cd2（H2C3PIm）2（BDC）（NO2）2（1,H2C3PIm = 2,2＇-（1,3-propanediyl）bis（1H-benzimidazole）,H2BDC = 1,4-benzenedicarboxylic acid） has been synthesized by solvothermal reaction in formamide,and its structure（C42H36Cd2N10O8,Mr = 1033.61） was determined by single-crystal X-ray diffraction analysis.The crystal belongs to the monoclinic system,space group P21/n with a = 0.9859（5）,b = 0.8936（5）,c = 2.3188（5） nm,β = 97.576（5）°,V = 2.025（16） nm3,Z = 2,Dc = 1.695 g/cm3,μ（MoKα） = 1.118 mm-1,F（000） = 1036,S = 1.017,the final R = 0.0304 and wR = 0.0752 for 3761 reflections with I 〉 2σ（I）.The centrosymmetric complex 1 contains a dimer in which two distorted octahedral Cd（II） centers are bridged by BDC ligand and chelated by H2C3PIm.The units of the complex are linked via weak N-H···O hydrogen bonds between the nitrito and the BDC ligands,leading to the formation of a 1D zigzag chain along the b axis.The π-π packing interactions contribute to the formation of a three-dimensional supramolecular architecture.The complex exhibits strong photoluminescence at room temperature.
基金Financially supported by Fujian Provincial Department of Education(JB10203)National Natural Science Foundation of China(20871115)
文摘A new cadmium（Ⅱ） coordination polymer,namely,[KCd2（edta）I]n（1,H4edta = ethylenediaminetetraacetic acid）,has been prepared and structurally characterized by single-crystal X-ray diffraction.Crystallographic data for 1：C10H12Cd2IKN2O8,Mr = 679.02,monoclinic,space group P21/n,a = 9.870（5）,b = 8.989（4）,c = 19.082（10） ,β = 104.581（10）o,V = 1638.5（13） 3,Z = 4,Dc = 2.753 g/cm3,μ = 4.776 mm-1,F（000） = 1272,the final R = 0.0473 and wR = 0.1311 for 2846 observed reflections with I 〉 2σ（I）.Polymer 1 features a 2-D layered structure,in which each edta4-ligand chelates/bridges five adjacent six-/seven-coordinated Cd（Ⅱ） centers with all ten donors（eight oxygen and two nitrogen） involved with coordination.Additional iodide I-ions as counterions are bound to the Cd（Ⅱ） centers in a terminal mode and the potassium K＋ ions are located in the layers and surrounded by O and I atoms from neighboring environment.The thermal stability of 1 has been discussed.
基金supported by the National Natural Science Foundation of China(No.20901059)the Technological Development Foundation Project of Tianjin Educational Committee(No.20080503)
文摘Two cadmium（Ⅱ） compounds linked by a flexible dipyridyl ligand {[Cd2（Hbpma） Cl5（H2O）]·2H2O}n 1 and [Cd（Hbpma）Cl（H2O）2]2·2SO4·3H2O 2 （bpma = N,N-bis（3-pyridylmethyl）amine） have been synthesized and structurally characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in triclinic, space group P with a = 9.5612（6）, b = 11.3401（7）, c = 11.5069（12）, α = 112.8540（10）, β = 106.5330（10）, γ = 101.6680（10）°, V = 1030.77（14）3, C12H20Cd2Cl5N3O3, Mr = 656.36, Z = 2, Dc = 2.115 g/cm3, μ（MoKα） = 2.727 mm–1, F（000） = 636, S = 1.059, the final R = 0.0319 and wR = 0.0822 for 3443 observed reflections （I 2σ（I））. For complex 2, it belongs to triclinic, space group P with a = 10.9487（4）, b = 11.4197（4）, c = 15.4288（5）, α = 94.7470（10）, β = 104.1000（10）, γ = 104.42°, V = 1790.76（11）3, C24H42Cd2Cl2N6O15S2, Mr = 1014.46, Z = 2, Dc = 1.881 g/cm3, μ（MoKα） = 1.529 mm–1, F（000） = 1020, S = 1.050, the final R = 0.0178 and wR = 0.0451 for 6026 observed reflections （I 2σ（I））. Complex 1 is found to have tetranuclear Cd（Ⅱ） clusters which are bridged by the protonated bpma ligands leading to one-dimensional coordination polymers, whereas complex 2 consists of binuclear Cd（Ⅱ） structures linked by the protonated bpma ligands. Both complexes are assembled into three-dimensional supramolecular structures through hydrogen bonding interactions.
基金supported by the National Natural Science Foundation of China(No.21273101)Tackle Key Problem of Science and Technology Project of Henan Province(No.142102310483)+1 种基金Program for Science&Technology Innovation Talents and Research Team in Universities of Henan(No.2014HASTIT014 and 4IRTSTHN008)Key Program of Foundation of Education Committee of Henan Province(No.14B150033)
文摘A new cadmium（Ⅱ） complex[Cd（Hminic）（IP）]n（1,Hminic = 2-hydroxy-6-methylisonicotinic acid,IP = imidazo[4,5-f]-l,10-phenanthroline）,has been synthesized by the reaction of a Hminic and auxiliary N-containing ligands with Cd（Ⅱ） ion under hydrothermal conditions.The complex was studied by elemental analysis,IR spectroscopy and X-ray crystallography.It is formulated as C（20）H（13）CdN5O3,crystallizes in monoclinic system,space group C2/c with α=9.6764（8）,b = 26.767（2）,c = 14.1332（11） A and β= 97.4510（10）°.V= 3629.7（5） A^3,Z = 8,Mr=483.75,Dc = 1.770 g/cm^3,F（000） = 1484 and μ= 1.237 mm^（-1）.The final refinement gave R = 0.0309 and wR = 0.0703 for 4151 reflections with I 〉2σ（I）.In the structure of 1,two Cd（Ⅱ） atoms are joined by a pair of μ2-hydroxyl oxygen atoms giving rise to a dinuclear Cd（Ⅱ） unit which is bridged by Hminic linkers to form a 1D ladder-like polymer chain.The chelating ligand IP coordinated to the Cd（Ⅱ） atom,and alternately attached to both sides of the ladder-like polymer chain.Adjacent chains are further bound together by strong intermolecular hydrogen bonds and face-to-face π…πinteractions,resulting in the formation of a 3D supramolecular architecture.Furthermore,the thermal stability and luminescent properties of this complex and the free ligands have been investigated.
基金supported by the Soft Science project of Shanxi Province(No.2013041020-03)
文摘A new dinuclear cadmium（Ⅱ） complex,[Cd（NPHSNPAB）（H_2O）_2（CH_3CH_2OH）]_2（1）,was synthesized by the hydrothermal reaction of N-phenyl-2-[2-hydroxyl-3-sulfo-5-nitrophenylazo]butadiene-1,3（NPHSNPAB） and Cd（NO_3）_2·4H_2O,and characterized by elemental analysis,infrared,UV-visible,fluorescence,thermal behavior and single-crystal X-ray diffraction. For this complex： C_（36）H_（42）Cd_2N_8O_（22）S_2,Mr = 1227.74,triclinic system,space group P1,a = 7.555（9）,b = 12.006（14）,c = 13.943（16） ？,α = 67.955（2）,β = 88.573（2）,γ = 77.550（2）o,V = 1142.5（2） ？~3,Z = 2,Dc = 1.784 g/cm^3,λ = 0.71073 ？,F（000） = 620,S = 1.125,R = 0.0460 and w R = 0.1159 for 3949 observed reflections with I 〉 2（I）. X-ray diffraction analysis reveals that the central Cd（Ⅱ） ion is bound by six oxygen atoms,forming a slightly distorted octahedral geometry. Density functional theory of complex 1 was studied. Noticeably,the application of 1 on metallic yarn got good effect.
基金Nanjing University of Posts and Telecommunications (No. NY209032)Key Laboratory of Functional Inorganic Material Chemistry(Heilongjiang University),Ministry of Education,Science Foundation for Youths of Guangxi Province (No. 0991089)the Major State Basic Research Development Program of China (973 Program,No. 2009CB930600)
文摘The title complex 1,[Cd 4 Cu 2 （pdc） 4 （H 2 O） 14 ] （H 3 pdc=3,5-pyrazoledicarboxylic acid）,has been solvothermally synthesized and structurally characterized by single-crystal X-ray diffraction.Complex 1 crystallizes in triclinic,space group P1 with a=0.67235（10）,b=1.27935（18）,c=1.28569（17） nm,α=112.633（2）,β=102.971（3）,γ=97.089（2）o,V=0.9673（2） nm 3,C 20 H 32 Cd 4 Cu 2 N 8 O 30,M r=1441.22,D c=2.474 g/cm 3,μ（MoKα）=3.356 mm 1,F（000）=698,S=1.003,Z=1,the final R=0.0471 and wR=0.0748 for I 2σ（Ⅰ）.In 1,two deprotonated 3,5-pyrazoledicarboxylic acids （pdc 3）,one copper（Ⅱ） ion and one cadmium（Ⅱ） ion firstly form a pyrazole-bridged Cu II Cd II dinuclear unit,two of which related by an inversion center are connected by another two cadmium（Ⅱ） ions through chelating carboxylate groups to construct the copper（Ⅱ）-cadmium（Ⅱ） heterometallic hexanuclear complexes.Plenty of hydrogen bond interactions existing in the system further lead to a three-dimensional （3D） supramolecular framework.
文摘A new method for determination of Cu（Ⅱ） by DDCT chelating resin preconcentration and thin layer resin phase spectrophotometry was developed. The method has a high sensitivity （ε455= 3.6×10^5L/mol·cm）, which is 33 times higher than that of liquid phase spectrophotometry. It has a good selectivity （most coexisting ions could not influence determination） and an ideal precision [30μg Cu（Ⅱ）, n=6, RSD= l.67%]. The content of Cu（Ⅱ） in water, high purity rare earth and its oxide was determined. The detection limit of Cu（Ⅱ） is 5.3μg/L , and the linear range is 0-7.2μg/ml. The result is satisfactory.
