A novel one-dimensional (1D) Cu(Ⅱ) nitronyl nitroxide complex bridged by iminodiacetate dianion [Cu(NIT4Py)(IDA)]n,where NIT4Py=2-(4'-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide and IDA= iminodiacetate...A novel one-dimensional (1D) Cu(Ⅱ) nitronyl nitroxide complex bridged by iminodiacetate dianion [Cu(NIT4Py)(IDA)]n,where NIT4Py=2-(4'-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide and IDA= iminodiacetate dianion,was synthesized and structurally characterized by X-ray diffraction. It crystallizes in monoclinic,space group P21/c with a=0.921 09(10) nm,b=0.780 09(9) nm,c=2.486 3(3) nm,β=96.826(2)°. The Cu(Ⅱ) ion is five-coordinated with a distorted square-pyramidal geometry. Each iminodiacetate dianion bridges two Cu(Ⅱ) ions via a monodentate-tridentate mode into a 1D chain,and these 1D chains are further linked into a 2D network via hydrogen-bonding interactions.展开更多
PS-PAMAM-IDA chelating resins were prepared by low-generations of polyamidoamine(PAMAM) and then chloroacetic acid functionalizing commercially available ammoniated polystyrene matrix, to preconcentrate Ni2+ from synt...PS-PAMAM-IDA chelating resins were prepared by low-generations of polyamidoamine(PAMAM) and then chloroacetic acid functionalizing commercially available ammoniated polystyrene matrix, to preconcentrate Ni2+ from synthetic aqueous samples. Different generations of PAMAM were used to obtain different chelating resins, PS-IDA, PS-1.0G PAMAM-IDA and PS-2.0G PAMAM-IDA. The synthesized resins were characterized by FTIR and elemental analysis. The effect of solution pH, kinetic studies, resin loading capacity, matrix effects etc., on metal ion adsorption to adsorbent phase, were studied by batch method. The PS-1.0G PAMAM-IDA resin was the most excellent adsorbents, with a maximum adsorption capacity of(24.09±1.79) mg/g for Ni2+ ion at pH=7. The interpretation of the equilibrium data was given by Langmuir isotherms model, and the correlation coefficient values for PS-IDA, PS-1.0G PAMAM-IDA and PS-2.0G PAMAM-IDA resins were 0.992, 0.994 and 0.987, respectively.展开更多
The adsorption behavior and mechanism of a novel chelate resin, iminodiacetic acid resin (IDAAR) for Y? were investigated. The statically saturated adsorption capacity is 102mg· g- 1 resin at 298K in HAc NaAc med...The adsorption behavior and mechanism of a novel chelate resin, iminodiacetic acid resin (IDAAR) for Y? were investigated. The statically saturated adsorption capacity is 102mg· g- 1 resin at 298K in HAc NaAc medium at pH 5.7. Y? adsorbed on IDAAR can be reductively eluted by 1.0～ 4.0mol· L- 1 HCl used as eluant and the elution percentages are almost as high as 100% . The resin can be regenerated and reused without apparent decrease in adsorption capacity. The apparent adsorption rate constant is k298=3.36× 10- 5s- 1. The adsorption behavior of IDAAR for Y? conforms to Freundlich′ s model reasonably. The thermodynamic adsorption parameter, enthalpy change Δ H of IDAAR for Y? is 18.6kJ· mol- 1. The complex molar ratio of the functional group of IDAAR to Y? is about 3∶ 1. The adsorption mechanism of IDAAR for Y? was examined by using chemical method and IR spectrometry.展开更多
A new nickel coordination compound [Ni(L2-)(2,2′-bipy)(H2O)]·2H2O (H2L=phenyliminodiacetic acid) was obtained by self-assembly of phenyliminodiacetic acid, 2,2′-bipy, and NiCl2·6H2O in the mixed solvent of...A new nickel coordination compound [Ni(L2-)(2,2′-bipy)(H2O)]·2H2O (H2L=phenyliminodiacetic acid) was obtained by self-assembly of phenyliminodiacetic acid, 2,2′-bipy, and NiCl2·6H2O in the mixed solvent of water and ethanol (V∶V=1∶1). The complex was characterized by elemental analysis, IR spectra, and X-ray crystallography analysis. The crystal is monoclinic, space group P21 / c with a=0.867 4(2) nm, b=0.907 3(1) nm, c=2.643 5(5) nm, β=91.01(1)°, V=2.080 2(4) nm3, Z=4, F(000)=992, Dc=1.520 Mg·m-3, R1=0.027 0 and wR2=0.067 5. In the complex, nickel atom is coordinated with a distorted octahedral geometry and extensive hydrogen bonds link the complexes into a 2D network structure. CCDC: 244926.展开更多
文摘A novel one-dimensional (1D) Cu(Ⅱ) nitronyl nitroxide complex bridged by iminodiacetate dianion [Cu(NIT4Py)(IDA)]n,where NIT4Py=2-(4'-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide and IDA= iminodiacetate dianion,was synthesized and structurally characterized by X-ray diffraction. It crystallizes in monoclinic,space group P21/c with a=0.921 09(10) nm,b=0.780 09(9) nm,c=2.486 3(3) nm,β=96.826(2)°. The Cu(Ⅱ) ion is five-coordinated with a distorted square-pyramidal geometry. Each iminodiacetate dianion bridges two Cu(Ⅱ) ions via a monodentate-tridentate mode into a 1D chain,and these 1D chains are further linked into a 2D network via hydrogen-bonding interactions.
基金Project(51074192)supported by the National Natural Science Foundation of China
文摘PS-PAMAM-IDA chelating resins were prepared by low-generations of polyamidoamine(PAMAM) and then chloroacetic acid functionalizing commercially available ammoniated polystyrene matrix, to preconcentrate Ni2+ from synthetic aqueous samples. Different generations of PAMAM were used to obtain different chelating resins, PS-IDA, PS-1.0G PAMAM-IDA and PS-2.0G PAMAM-IDA. The synthesized resins were characterized by FTIR and elemental analysis. The effect of solution pH, kinetic studies, resin loading capacity, matrix effects etc., on metal ion adsorption to adsorbent phase, were studied by batch method. The PS-1.0G PAMAM-IDA resin was the most excellent adsorbents, with a maximum adsorption capacity of(24.09±1.79) mg/g for Ni2+ ion at pH=7. The interpretation of the equilibrium data was given by Langmuir isotherms model, and the correlation coefficient values for PS-IDA, PS-1.0G PAMAM-IDA and PS-2.0G PAMAM-IDA resins were 0.992, 0.994 and 0.987, respectively.
文摘The adsorption behavior and mechanism of a novel chelate resin, iminodiacetic acid resin (IDAAR) for Y? were investigated. The statically saturated adsorption capacity is 102mg· g- 1 resin at 298K in HAc NaAc medium at pH 5.7. Y? adsorbed on IDAAR can be reductively eluted by 1.0～ 4.0mol· L- 1 HCl used as eluant and the elution percentages are almost as high as 100% . The resin can be regenerated and reused without apparent decrease in adsorption capacity. The apparent adsorption rate constant is k298=3.36× 10- 5s- 1. The adsorption behavior of IDAAR for Y? conforms to Freundlich′ s model reasonably. The thermodynamic adsorption parameter, enthalpy change Δ H of IDAAR for Y? is 18.6kJ· mol- 1. The complex molar ratio of the functional group of IDAAR to Y? is about 3∶ 1. The adsorption mechanism of IDAAR for Y? was examined by using chemical method and IR spectrometry.
文摘A new nickel coordination compound [Ni(L2-)(2,2′-bipy)(H2O)]·2H2O (H2L=phenyliminodiacetic acid) was obtained by self-assembly of phenyliminodiacetic acid, 2,2′-bipy, and NiCl2·6H2O in the mixed solvent of water and ethanol (V∶V=1∶1). The complex was characterized by elemental analysis, IR spectra, and X-ray crystallography analysis. The crystal is monoclinic, space group P21 / c with a=0.867 4(2) nm, b=0.907 3(1) nm, c=2.643 5(5) nm, β=91.01(1)°, V=2.080 2(4) nm3, Z=4, F(000)=992, Dc=1.520 Mg·m-3, R1=0.027 0 and wR2=0.067 5. In the complex, nickel atom is coordinated with a distorted octahedral geometry and extensive hydrogen bonds link the complexes into a 2D network structure. CCDC: 244926.
