A novel Zn(Ⅱ) complex, [ZnL2(H2O)4]·H2O(1, HL = 2-(nicotinoyloxy)acetic acid), was synthesized using Zn(OAc)2·2H2O and 2-(nicotinoyloxy)acetic acid as raw materials. Its structure has been eluci...A novel Zn(Ⅱ) complex, [ZnL2(H2O)4]·H2O(1, HL = 2-(nicotinoyloxy)acetic acid), was synthesized using Zn(OAc)2·2H2O and 2-(nicotinoyloxy)acetic acid as raw materials. Its structure has been elucidated by elemental analysis, IR and single-crystal X-ray diffraction. The structural analysis revealed that complex 1 crystallizes in triclinic, space group P1 and the Zn(Ⅱ) atom is six-coordinated with two N atoms from two different 2-(nicotinoyloxy)acetate anion ligands and four O atoms from coordinated water molecules. Complex 1 forms a 3D network structure by O–H···O hydrogen bonds. The antitumor activities of 2-(nicotinoyloxy)acetic acid ligand and its Zn(Ⅱ) complex were evaluated against human lung adenocarcinoma A549 cells, human hepatoma SMMC-7721 cells and human colon carcinoma Wi Dr cells.展开更多
With the help of in-situ formed CH_3COO- anion, a pair of 3D homochiral coordination polymers with open channels were constructed by the assembly of lactic acid derivative ligands, 1.4-DIB ligands and Cd(II) ions, n...With the help of in-situ formed CH_3COO- anion, a pair of 3D homochiral coordination polymers with open channels were constructed by the assembly of lactic acid derivative ligands, 1.4-DIB ligands and Cd(II) ions, namely [Cd3((R)-CIA)2(CH3CO2)_2(1.4-DIB)2(H2O)2]·x(Guest)(1-D) and [Cd3((S)-CIA)2(CH3CO2)2(1.4-DIB)2(H2O)2]·x(Guest)(1-L). They contain 1D interesting ladder-like Cd-(R)-CIA(3-) chains and exhibit SHG-active behavior and photoluminescent property.展开更多
Silica gel thin-layer plates covered with L-arginine and copper acetate were used for the separation of amino acid enantiomers, The chromatographic selectivity and the effects of plate different preparation methods, s...Silica gel thin-layer plates covered with L-arginine and copper acetate were used for the separation of amino acid enantiomers, The chromatographic selectivity and the effects of plate different preparation methods, sample molecular structure and solvent compositions on resolution performance were also discussed.展开更多
Hydrothermal reactions of 5-(tetrazol-5-yl) isophthalic acid with cadmium nitrate/praseodymium nitrate led to two complexes of [Cd3(TZI)2(H2O)(11)]n(1) and [Pr(TZI)(H2O)5]n(2). Their structures and pro...Hydrothermal reactions of 5-(tetrazol-5-yl) isophthalic acid with cadmium nitrate/praseodymium nitrate led to two complexes of [Cd3(TZI)2(H2O)(11)]n(1) and [Pr(TZI)(H2O)5]n(2). Their structures and properties were determined by X-ray diffraction, IR spectroscopy, fluorescence spectrum, thermal gravimetric analyses and elemental analysis. Complex 1 belongs to monoclinic system, I2/c space group, with a = 12.8688(3), b = 18.0925(3), c = 14.5190(3)A, β = 116.054(3)°, V =3036.92(13) A^3, Z = 4; complex 2 crystallizes in triclinic, space group P 1, with a = 7.9690(5), b =9.7665(8), c = 10.4353(9) A, α = 116.709(9), β = 107.461(6), γ = 95.671(6)°, V = 665.54(9)A^3 and Z =2. Complex 1 is a 3D planar structure. Complex 2 is a one-dimensional double chain configuration and extends into a 3D network by hydrogen bonds and π-π interactions.展开更多
The title Mn(Ⅱ) coordination polymer,poly{[heptaaqua-(μ4-bi-phenyl-3,3?,5,5?-tetracarboxylate)-bimanganese(Ⅱ)] pentahydrate},[Mn_2(bpta)(H_2O)_7]_n·5n H_2O(I),is crystallized from a mixture of bi...The title Mn(Ⅱ) coordination polymer,poly{[heptaaqua-(μ4-bi-phenyl-3,3?,5,5?-tetracarboxylate)-bimanganese(Ⅱ)] pentahydrate},[Mn_2(bpta)(H_2O)_7]_n·5n H_2O(I),is crystallized from a mixture of biphenyl-3,3?,5,5?-tetracarboxylic acid(H_4bpta) and MnCl_2·4H_2O in waterethanol under room temperature. Its asymmetric unit consists of one and two halves of crystallographically independent Mn(Ⅱ) cations,one fully deprotonated H4 bpta ligand,seven coordinated water molecules and five solvent water as guest molecules. In I,each Mn(Ⅱ) atom is octahedrally coordinated by six oxygen atoms from bpta^(4-) anions and coordinated water molecules. In the Mn(Ⅱ) cations,one half Mn(Ⅱ) ion of them located at a 2-fold axis generating a trinuclear [Mn_3(H_2O)_2(RCOO)_2] linker by μ1,1-O(water) and μ1,3-O,O?(carboxylate) bridges and another half Mn(Ⅱ) ion with an inversion is a mononuclear linker. These neighbouring trinuclear and mononuclear Mn(Ⅱ) cations are linked together by biphenyl-3,3?,5,5?-tetracarboxylates to form a three-dimensional framework with a(42.84) topology of a(4,4)-connected net,in which the positions of the trinuclear [Mn_3(H_2O)_2(R-COO)_2] linker as a 4-connector linking four bpta^(4-) ligands in I reproduce an eagle-shaped arrangement. The polymeric structure exhibits a water channel with an accessible void of 797.1 ?~3,amounting to 15.7% of the total unit-cell volume. Each of the cavities in the network is occupied by solvent water molecules.展开更多
N,N-dibutyldiglycol amic acid (HL1) and N,N-dioctyldiglycol nmic acid (HLu) were synthesized and characterized by conventional spectroscopic methods. These molecules were examined as extractants for extraction-sep...N,N-dibutyldiglycol amic acid (HL1) and N,N-dioctyldiglycol nmic acid (HLu) were synthesized and characterized by conventional spectroscopic methods. These molecules were examined as extractants for extraction-separation of La(Ⅲ), Eu(Ⅲ) and Er(Ⅲ), as representative ions of light, middle and heavy rare earths, from aqueous chloride solutions. The analysis of the extraction equilibria revealed that the extracted species of lanthanum and europium ions by both of the extractants had a 1:3 metal to ligand ratio It was suggested that erbium ions were extracted into the organic phase via the formation ofEr(LIor Ⅱ)2Cl complexes. The effect of the organic diluents on the extraction-separation efficiency of the studied rare earths by HLI and HLⅡ was investigated by comparing the results obtained in dichloromethane and carbon tetrachloride. Regardless to the diluent used, the order of selectivity presented by the investigated extractants was Er(Ⅲ)〉Eu(Ⅲ)〉La(Ⅲ). It is noteworthy that, a significant enhancement in separation of the studied rare earths by the extractants was achieved in their competitive extraction experiments with respect to that obtained in single component extraction experiments. Applicability of the extractants for the removal of rare earth ions from spent Ni-MH batteries was tested by removal ofLa(Ⅲ), Eu(Ⅲ) and Er(Ⅲ) ions from simulated leach solution of such batteries.展开更多
基金supported by the National Natural Science Foundation of China(No.21171132)the Project of Shandong Province Higher Educational Science and Technology Program(J14LC01)Science Foundation of Weifang
文摘A novel Zn(Ⅱ) complex, [ZnL2(H2O)4]·H2O(1, HL = 2-(nicotinoyloxy)acetic acid), was synthesized using Zn(OAc)2·2H2O and 2-(nicotinoyloxy)acetic acid as raw materials. Its structure has been elucidated by elemental analysis, IR and single-crystal X-ray diffraction. The structural analysis revealed that complex 1 crystallizes in triclinic, space group P1 and the Zn(Ⅱ) atom is six-coordinated with two N atoms from two different 2-(nicotinoyloxy)acetate anion ligands and four O atoms from coordinated water molecules. Complex 1 forms a 3D network structure by O–H···O hydrogen bonds. The antitumor activities of 2-(nicotinoyloxy)acetic acid ligand and its Zn(Ⅱ) complex were evaluated against human lung adenocarcinoma A549 cells, human hepatoma SMMC-7721 cells and human colon carcinoma Wi Dr cells.
基金supported by the Natural Science Foundation of Guizhou Province(20122344)125 program of Guizhou Education Department(2012015)the Doctoral Scientific Fund of Zunyi Normal College(2012BSJJ12)
文摘With the help of in-situ formed CH_3COO- anion, a pair of 3D homochiral coordination polymers with open channels were constructed by the assembly of lactic acid derivative ligands, 1.4-DIB ligands and Cd(II) ions, namely [Cd3((R)-CIA)2(CH3CO2)_2(1.4-DIB)2(H2O)2]·x(Guest)(1-D) and [Cd3((S)-CIA)2(CH3CO2)2(1.4-DIB)2(H2O)2]·x(Guest)(1-L). They contain 1D interesting ladder-like Cd-(R)-CIA(3-) chains and exhibit SHG-active behavior and photoluminescent property.
文摘Silica gel thin-layer plates covered with L-arginine and copper acetate were used for the separation of amino acid enantiomers, The chromatographic selectivity and the effects of plate different preparation methods, sample molecular structure and solvent compositions on resolution performance were also discussed.
基金Supported by the International Science&Technology Cooperation Program of China(No.2011DFA51980)the International Scientific and Technological Cooperation Projects of Shanxi Province(No.2015081043)+1 种基金“131”Leading Talents Project in Colleges and Universities,Science and Technology Innovation Project of Shanxi Province(No.2014101002)Graduate Student Education Innovation Project of Shanxi Province(No.20141101)
文摘Hydrothermal reactions of 5-(tetrazol-5-yl) isophthalic acid with cadmium nitrate/praseodymium nitrate led to two complexes of [Cd3(TZI)2(H2O)(11)]n(1) and [Pr(TZI)(H2O)5]n(2). Their structures and properties were determined by X-ray diffraction, IR spectroscopy, fluorescence spectrum, thermal gravimetric analyses and elemental analysis. Complex 1 belongs to monoclinic system, I2/c space group, with a = 12.8688(3), b = 18.0925(3), c = 14.5190(3)A, β = 116.054(3)°, V =3036.92(13) A^3, Z = 4; complex 2 crystallizes in triclinic, space group P 1, with a = 7.9690(5), b =9.7665(8), c = 10.4353(9) A, α = 116.709(9), β = 107.461(6), γ = 95.671(6)°, V = 665.54(9)A^3 and Z =2. Complex 1 is a 3D planar structure. Complex 2 is a one-dimensional double chain configuration and extends into a 3D network by hydrogen bonds and π-π interactions.
基金supported by the National Natural Science Foundation of China(No.21571118)
文摘The title Mn(Ⅱ) coordination polymer,poly{[heptaaqua-(μ4-bi-phenyl-3,3?,5,5?-tetracarboxylate)-bimanganese(Ⅱ)] pentahydrate},[Mn_2(bpta)(H_2O)_7]_n·5n H_2O(I),is crystallized from a mixture of biphenyl-3,3?,5,5?-tetracarboxylic acid(H_4bpta) and MnCl_2·4H_2O in waterethanol under room temperature. Its asymmetric unit consists of one and two halves of crystallographically independent Mn(Ⅱ) cations,one fully deprotonated H4 bpta ligand,seven coordinated water molecules and five solvent water as guest molecules. In I,each Mn(Ⅱ) atom is octahedrally coordinated by six oxygen atoms from bpta^(4-) anions and coordinated water molecules. In the Mn(Ⅱ) cations,one half Mn(Ⅱ) ion of them located at a 2-fold axis generating a trinuclear [Mn_3(H_2O)_2(RCOO)_2] linker by μ1,1-O(water) and μ1,3-O,O?(carboxylate) bridges and another half Mn(Ⅱ) ion with an inversion is a mononuclear linker. These neighbouring trinuclear and mononuclear Mn(Ⅱ) cations are linked together by biphenyl-3,3?,5,5?-tetracarboxylates to form a three-dimensional framework with a(42.84) topology of a(4,4)-connected net,in which the positions of the trinuclear [Mn_3(H_2O)_2(R-COO)_2] linker as a 4-connector linking four bpta^(4-) ligands in I reproduce an eagle-shaped arrangement. The polymeric structure exhibits a water channel with an accessible void of 797.1 ?~3,amounting to 15.7% of the total unit-cell volume. Each of the cavities in the network is occupied by solvent water molecules.
文摘N,N-dibutyldiglycol amic acid (HL1) and N,N-dioctyldiglycol nmic acid (HLu) were synthesized and characterized by conventional spectroscopic methods. These molecules were examined as extractants for extraction-separation of La(Ⅲ), Eu(Ⅲ) and Er(Ⅲ), as representative ions of light, middle and heavy rare earths, from aqueous chloride solutions. The analysis of the extraction equilibria revealed that the extracted species of lanthanum and europium ions by both of the extractants had a 1:3 metal to ligand ratio It was suggested that erbium ions were extracted into the organic phase via the formation ofEr(LIor Ⅱ)2Cl complexes. The effect of the organic diluents on the extraction-separation efficiency of the studied rare earths by HLI and HLⅡ was investigated by comparing the results obtained in dichloromethane and carbon tetrachloride. Regardless to the diluent used, the order of selectivity presented by the investigated extractants was Er(Ⅲ)〉Eu(Ⅲ)〉La(Ⅲ). It is noteworthy that, a significant enhancement in separation of the studied rare earths by the extractants was achieved in their competitive extraction experiments with respect to that obtained in single component extraction experiments. Applicability of the extractants for the removal of rare earth ions from spent Ni-MH batteries was tested by removal ofLa(Ⅲ), Eu(Ⅲ) and Er(Ⅲ) ions from simulated leach solution of such batteries.