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
A new 2D coordination polymer, {[Cd5(BTC)2(L)4(H2O)2]n·2H2O}n(1, H3BTC = 1,3,5-benzenetricarboxylic acid, HL = 3-(2-pyridyl)pyrazole) was synthesized under hydrothermal conditions and characterized by single-crys...A new 2D coordination polymer, {[Cd5(BTC)2(L)4(H2O)2]n·2H2O}n(1, H3BTC = 1,3,5-benzenetricarboxylic acid, HL = 3-(2-pyridyl)pyrazole) was synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction, powder XRD, IR, TGA, fluorescence spectrum and elemental analysis techniques. Complex 1 belongs to the monoclinic system, P21/c space group, with a = 8.8732(4), b = 17.5179(7), c = 17.8123(7) ?, β = 103.1830(10)°, V = 2695.77(19) ?3 and Z = 2. It features a 2D network constructed by BTC and L ligand. In addition, we analyzed Natural Bond Orbital(NBO) by using the PBE0/LANL2DZ method built in Gaussian 09 Program. The calculation results indicated obvious covalent interactions between the coordinated atoms and Cd(Ⅱ) ion.展开更多
A new Cadmium!-Ciprofloxacin ionic compound, (HCPFX)2CdCl4·3H2O, is synthesized and its crys- tal structure is determined. The crystallography data are as follows, monoclinic, space group P21/c, a=1.01039(6) nm, ...A new Cadmium!-Ciprofloxacin ionic compound, (HCPFX)2CdCl4·3H2O, is synthesized and its crys- tal structure is determined. The crystallography data are as follows, monoclinic, space group P21/c, a=1.01039(6) nm, b=1.39989(9) nm, c=2.82245(18) nm, β=95.765 0(10)°, V=3.972 0(4) nm3, Z=4, Dc=1.627 g·cm-3, F(000)= 1984. R1=0.0540, wR2=0.1503 (I>2σ(I)). In the title compound, four chloride ions are coordinated to the cadmi- um ion forming a slightly distorted tetrahedron. Both Ciprofloxacin and the compound were assayed against gram- positive and gram-negative bacteria by doubling dilutions method, the compound shows the same minimal in- hibitory concentration (MIC) as the Ciprofloxacin against S. Aureus, M. Lutens, E. Coli and P. Aeruginosa bacte- ria. The inhibitory effect of the two compounds on leukemia HL-60 cell line has been measured by using MTT (Methyl-Thiazol-Tetrozolium) assay method. The results indicate that the complex has very strong inhibitory effect on HL-60 cell line. CCDC: 259367.展开更多
Hydroxyapatite（HAP） has been widely used to immobilize many cationic metals in water and soils. The specific reason why an increase in the surface area of HAP enhances cadmium（Cd） uptake, but has no effect on lead...Hydroxyapatite（HAP） has been widely used to immobilize many cationic metals in water and soils. The specific reason why an increase in the surface area of HAP enhances cadmium（Cd） uptake, but has no effect on lead（Pb） uptake, is not clear. The aim of this study was to determine the factors causing the differences in sorption behavior between Cd and Pb by evaluating HAPs with different surface areas. We synthesized HAPs with two different surface areas, which were characterized by X-ray diffraction, N2 adsorption, and scanning electron microscopy, and then evaluated them as sorbents for Cd and Pb removal by testing in single and binary systems. The sorption capacity of large surface area HAP（1.85 mmol/g） for Cd in the single-metal system was higher than that of small surface area HAP（0.64 mmol/g）, but there were no differences between single- and binary-metal solutions containing Pb. After the Cd experiments, the HAP retained a stable structure and intact morphology, which promotes the accessibility of reactive sites for Cd. However, a newly formed precipitate covered the surface and blocked the channels in the presence of Pb, which reduced the number of potential adsorption sites on HAP for Cd and Pb.Remediation experiments using Cd- and Pb-contaminated soil produced similar results to the solution tests. These results indicate that alterations of the structure and morphology during the reaction is an important factor influencing metal sorption to HAP.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 Science and Technology development plan of Jilin Province(2015052006JH)
文摘A new 2D coordination polymer, {[Cd5(BTC)2(L)4(H2O)2]n·2H2O}n(1, H3BTC = 1,3,5-benzenetricarboxylic acid, HL = 3-(2-pyridyl)pyrazole) was synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction, powder XRD, IR, TGA, fluorescence spectrum and elemental analysis techniques. Complex 1 belongs to the monoclinic system, P21/c space group, with a = 8.8732(4), b = 17.5179(7), c = 17.8123(7) ?, β = 103.1830(10)°, V = 2695.77(19) ?3 and Z = 2. It features a 2D network constructed by BTC and L ligand. In addition, we analyzed Natural Bond Orbital(NBO) by using the PBE0/LANL2DZ method built in Gaussian 09 Program. The calculation results indicated obvious covalent interactions between the coordinated atoms and Cd(Ⅱ) ion.
文摘A new Cadmium!-Ciprofloxacin ionic compound, (HCPFX)2CdCl4·3H2O, is synthesized and its crys- tal structure is determined. The crystallography data are as follows, monoclinic, space group P21/c, a=1.01039(6) nm, b=1.39989(9) nm, c=2.82245(18) nm, β=95.765 0(10)°, V=3.972 0(4) nm3, Z=4, Dc=1.627 g·cm-3, F(000)= 1984. R1=0.0540, wR2=0.1503 (I>2σ(I)). In the title compound, four chloride ions are coordinated to the cadmi- um ion forming a slightly distorted tetrahedron. Both Ciprofloxacin and the compound were assayed against gram- positive and gram-negative bacteria by doubling dilutions method, the compound shows the same minimal in- hibitory concentration (MIC) as the Ciprofloxacin against S. Aureus, M. Lutens, E. Coli and P. Aeruginosa bacte- ria. The inhibitory effect of the two compounds on leukemia HL-60 cell line has been measured by using MTT (Methyl-Thiazol-Tetrozolium) assay method. The results indicate that the complex has very strong inhibitory effect on HL-60 cell line. CCDC: 259367.
基金supported by the National Natural Science Foundation of China(No.41301347)the Anhui Provincial Natural Science Foundation(No.1408085MKL61)+1 种基金the Scientific and Technical Key Research Program of Auhui(No.1501031088)the Natural Science Foundation of Anhui Academy of Agricultural Sciences(No.16A1029)
文摘Hydroxyapatite（HAP） has been widely used to immobilize many cationic metals in water and soils. The specific reason why an increase in the surface area of HAP enhances cadmium（Cd） uptake, but has no effect on lead（Pb） uptake, is not clear. The aim of this study was to determine the factors causing the differences in sorption behavior between Cd and Pb by evaluating HAPs with different surface areas. We synthesized HAPs with two different surface areas, which were characterized by X-ray diffraction, N2 adsorption, and scanning electron microscopy, and then evaluated them as sorbents for Cd and Pb removal by testing in single and binary systems. The sorption capacity of large surface area HAP（1.85 mmol/g） for Cd in the single-metal system was higher than that of small surface area HAP（0.64 mmol/g）, but there were no differences between single- and binary-metal solutions containing Pb. After the Cd experiments, the HAP retained a stable structure and intact morphology, which promotes the accessibility of reactive sites for Cd. However, a newly formed precipitate covered the surface and blocked the channels in the presence of Pb, which reduced the number of potential adsorption sites on HAP for Cd and Pb.Remediation experiments using Cd- and Pb-contaminated soil produced similar results to the solution tests. These results indicate that alterations of the structure and morphology during the reaction is an important factor influencing metal sorption to HAP.
