By using a flexible multidentate ligand,bis（2-hydroxyethyl）iminotris（hydroxyhydroxylmethy）methane（＇bis-tris＇：H5L）,the title complex {[Na（H6L）2]2}n·nV10O28（1） has been successfully synthesized under s...By using a flexible multidentate ligand,bis（2-hydroxyethyl）iminotris（hydroxyhydroxylmethy）methane（＇bis-tris＇：H5L）,the title complex {[Na（H6L）2]2}n·nV10O28（1） has been successfully synthesized under self-assembly condition and characterized by IR spectroscopy,elemental analysis,PXRD and single-crystal X-ray diffraction.The crystal structure belongs to an orthorhombic system,space group Cmca with a = 23.752（2）,b = 13.5360（8）,c = 18.5377（11） ,V = 5960.1（7）,Z = 8,Dc = 2.055 g/cm3,F（000） = 3744,μ = 1.630 mm-1,the final R = 0.0283 and wR = 0.0759 for 3353 observed reflections with I 〉 2σ（I）.This complex consists of decavanadate [V10O28]6-motifs as counter anions intercalated with one-dimensiond chains of the composition [Na（H6L）2]n3n＋.And significant intermolecular O-H…O hydrogen-bonding interactions lead to a three-dimensional supramolecular framework.展开更多
A new inorganic-organic hybrid supramolecular compound [Habo]6[V10O28]·2C3H7OH·2H2O 1 （abo = R（-）-2-amino-1-butanol） has been synthesized from VO2^＋ in organic solvents and its crystal structure was rep...A new inorganic-organic hybrid supramolecular compound [Habo]6[V10O28]·2C3H7OH·2H2O 1 （abo = R（-）-2-amino-1-butanol） has been synthesized from VO2^＋ in organic solvents and its crystal structure was reported as follows： monoclinic, space group P21/n, a = 11.419（9）, b = 16.811（16）, c = 15.521（12） A, β= 102.98（2）°, V= 2903（4） A^3, Z = 4, C15H46N3O19V5, Mr = 827.25, Dc = 1.893 g/cm^3, 2（MoKα） = 0.71073 A, μ = 1.636 mm^-1, F（000） = 1696, the final R = 0.0696 and wR = 0.1361 for 4641 observed reflections with I 〉 2σ（I）. The compound is based on decavanadate clusters [V10O28]^6-. The hydrogen bonding interactions among Habo^＋ cations, solvents and decavanadate clusters extend 1 into a three-dimensional supramolecular architecture.展开更多
The number of papers about decavanadate has doubled in the past decade. In the present review, new insights into decavanadate biochemistry, cell biology, and antidiabetic and antitumor activities are described. Decame...The number of papers about decavanadate has doubled in the past decade. In the present review, new insights into decavanadate biochemistry, cell biology, and antidiabetic and antitumor activities are described. Decameric vanadate species (V10) clearly differs from monomeric vanadate (V1), and affects differently calcium pumps, and structure and function of myosin and actin. Only decavanadate inhibits calcium accumulation by calcium pump ATPase, and strongly inhibits actomyosin ATPase activity (IC50 = 1.4 μmol/L, V10), whereas no such ef- fects are detected with V1 up to 150 μmol/L; prevents actin polymerization (IC50 of 68 μmol/L, whereas no effects detected with up to 2 mmol/L V1); and interacts with actin in a way that induces cysteine oxidation and vanadate reduction to vanadyl. Moreover, in vivo decavanadate toxicity studies have revealed that acute exposure to polyoxovanadate induces different changes in antioxidant enzymes and oxidative stress parameters, in comparison with vanadate. In vitro studies have clearly demonstrated that mitochondrial oxygen consumption is strongly affected by decavanadate (IC50, 0.1 μmol/L); perhaps the most relevant biological effect. Finally, decavanadate (100 μmol/L) increases rat adipocyte glucose accumulation more potently than several vanadium complexes. Preliminary studies sug- gest that decavanadate does not have similar effects in human adipocytes. Although decavanadate can be a useful biochemical tool, further studies must be carried out before it can be conf irmed that decavanadate and its complexes can be used as anticancer or antidiabetic agents.展开更多
The salt, [Y（H2O）8]2[V10O28]·9H2O, contains two discrete water-groups coordinated Y（Ⅲ） cations, an isopoly complex ion, decavanadate （V10O28^6-） and nine additional water molecules, which are combined toge...The salt, [Y（H2O）8]2[V10O28]·9H2O, contains two discrete water-groups coordinated Y（Ⅲ） cations, an isopoly complex ion, decavanadate （V10O28^6-） and nine additional water molecules, which are combined together by static electric forces and hydrogen bonds. The y^3＋ is eight-coordinated with a square antiprism geometry. The single-crystal X-ray analysis reveals that the crystal crystallizes in triclinic, space group P1^- with a = 9.1454 （18）, b = 10.007（2）, c = 12.772（3） A°, α= 68.86（3）, β = 77.50（3）, γ= 89.23（3）°, V= 1061.7（4）A°^3 and Z= 1.展开更多
A novel vanadate decamer, involving all vanadium atoms present in +5 oxidation and one formhydroxamic acid dimer cation readical, has been synthesized. The single-crystal X-ray diffraction shows that the orange crysta...A novel vanadate decamer, involving all vanadium atoms present in +5 oxidation and one formhydroxamic acid dimer cation readical, has been synthesized. The single-crystal X-ray diffraction shows that the orange crystal is formed in the triclinic system, space group Pi, a = 8. 4960 (17), b = 10.447 (2), c = 11.299 (2) A, α= 68. 82 (3)°,β= 87.35 (3)°, γ = 66.97(3)°. V = 855. 3(3) A3, Z = 8, R1 = 0. 0857, wR2=0. 2551. X-ray crystallographic and packing in superlattice studies showed that the crystal structure was constructed by electrostatic attraction of O-H…O hydrogen bonds between formhydroxamic acid dimer cation and decavanadate polyanion. Formhydroxamic acid dimer is got through controlling the condition of the reaction using formhydroxamic acid.展开更多
A new decavanadate, (C4N2H7)4(C6N2H10)V10O28·2H2O, was synthesized by slow evaporation at room temperature and characterized by single crystal X-ray diffraction, IR and UV-Vis spectroscopies. The compound crystal...A new decavanadate, (C4N2H7)4(C6N2H10)V10O28·2H2O, was synthesized by slow evaporation at room temperature and characterized by single crystal X-ray diffraction, IR and UV-Vis spectroscopies. The compound crystallizes in the triclinic system, P-1 space group with the cell parameters: a = 11.200(5) Å, b = 12.056(9) Å, c =20.511(7) Å, α = 73.40(4), β = 84.67(3), γ = 63.51(5), Z = 2 and volume V = 2373.7(1) Å3. The formula unit is composed of one decavanadate [V10O28]6- anion, four 2-methylimidazolium (C4N2H7)+ cations, one 2-amino-4-picolinium (C6N2H10)2+ cation and two water molecules. In the crystal, the layers of decavanadate groups, organic cations and water molecules stack up parallel to the (011) plane. The cohesion is provided by N-H···O, O-H···O hydrogen bonds and Van der Waals interactions leads to a three-dimensional structure. The absorbance spectrum measurement shows an optical band gap of 3.27 eV which allows us to conclude that this compound is a semiconductor material.展开更多
基金supported by 973 Program (2011CB932504), NNSFC (20971121)NSF for Young Scientists of China (20801056)NSF of Fujian Province
文摘By using a flexible multidentate ligand,bis（2-hydroxyethyl）iminotris（hydroxyhydroxylmethy）methane（＇bis-tris＇：H5L）,the title complex {[Na（H6L）2]2}n·nV10O28（1） has been successfully synthesized under self-assembly condition and characterized by IR spectroscopy,elemental analysis,PXRD and single-crystal X-ray diffraction.The crystal structure belongs to an orthorhombic system,space group Cmca with a = 23.752（2）,b = 13.5360（8）,c = 18.5377（11） ,V = 5960.1（7）,Z = 8,Dc = 2.055 g/cm3,F（000） = 3744,μ = 1.630 mm-1,the final R = 0.0283 and wR = 0.0759 for 3353 observed reflections with I 〉 2σ（I）.This complex consists of decavanadate [V10O28]6-motifs as counter anions intercalated with one-dimensiond chains of the composition [Na（H6L）2]n3n＋.And significant intermolecular O-H…O hydrogen-bonding interactions lead to a three-dimensional supramolecular framework.
基金This work was supported by the National Natural Science Foundation of China and Natural Science Foundation of Fujian Province
文摘A new inorganic-organic hybrid supramolecular compound [Habo]6[V10O28]·2C3H7OH·2H2O 1 （abo = R（-）-2-amino-1-butanol） has been synthesized from VO2^＋ in organic solvents and its crystal structure was reported as follows： monoclinic, space group P21/n, a = 11.419（9）, b = 16.811（16）, c = 15.521（12） A, β= 102.98（2）°, V= 2903（4） A^3, Z = 4, C15H46N3O19V5, Mr = 827.25, Dc = 1.893 g/cm^3, 2（MoKα） = 0.71073 A, μ = 1.636 mm^-1, F（000） = 1696, the final R = 0.0696 and wR = 0.1361 for 4641 observed reflections with I 〉 2σ（I）. The compound is based on decavanadate clusters [V10O28]^6-. The hydrogen bonding interactions among Habo^＋ cations, solvents and decavanadate clusters extend 1 into a three-dimensional supramolecular architecture.
文摘The number of papers about decavanadate has doubled in the past decade. In the present review, new insights into decavanadate biochemistry, cell biology, and antidiabetic and antitumor activities are described. Decameric vanadate species (V10) clearly differs from monomeric vanadate (V1), and affects differently calcium pumps, and structure and function of myosin and actin. Only decavanadate inhibits calcium accumulation by calcium pump ATPase, and strongly inhibits actomyosin ATPase activity (IC50 = 1.4 μmol/L, V10), whereas no such ef- fects are detected with V1 up to 150 μmol/L; prevents actin polymerization (IC50 of 68 μmol/L, whereas no effects detected with up to 2 mmol/L V1); and interacts with actin in a way that induces cysteine oxidation and vanadate reduction to vanadyl. Moreover, in vivo decavanadate toxicity studies have revealed that acute exposure to polyoxovanadate induces different changes in antioxidant enzymes and oxidative stress parameters, in comparison with vanadate. In vitro studies have clearly demonstrated that mitochondrial oxygen consumption is strongly affected by decavanadate (IC50, 0.1 μmol/L); perhaps the most relevant biological effect. Finally, decavanadate (100 μmol/L) increases rat adipocyte glucose accumulation more potently than several vanadium complexes. Preliminary studies sug- gest that decavanadate does not have similar effects in human adipocytes. Although decavanadate can be a useful biochemical tool, further studies must be carried out before it can be conf irmed that decavanadate and its complexes can be used as anticancer or antidiabetic agents.
基金This work was supported by the Natural Science Foundation of Henan Province (20011500024)
文摘The salt, [Y（H2O）8]2[V10O28]·9H2O, contains two discrete water-groups coordinated Y（Ⅲ） cations, an isopoly complex ion, decavanadate （V10O28^6-） and nine additional water molecules, which are combined together by static electric forces and hydrogen bonds. The y^3＋ is eight-coordinated with a square antiprism geometry. The single-crystal X-ray analysis reveals that the crystal crystallizes in triclinic, space group P1^- with a = 9.1454 （18）, b = 10.007（2）, c = 12.772（3） A°, α= 68.86（3）, β = 77.50（3）, γ= 89.23（3）°, V= 1061.7（4）A°^3 and Z= 1.
文摘A novel vanadate decamer, involving all vanadium atoms present in +5 oxidation and one formhydroxamic acid dimer cation readical, has been synthesized. The single-crystal X-ray diffraction shows that the orange crystal is formed in the triclinic system, space group Pi, a = 8. 4960 (17), b = 10.447 (2), c = 11.299 (2) A, α= 68. 82 (3)°,β= 87.35 (3)°, γ = 66.97(3)°. V = 855. 3(3) A3, Z = 8, R1 = 0. 0857, wR2=0. 2551. X-ray crystallographic and packing in superlattice studies showed that the crystal structure was constructed by electrostatic attraction of O-H…O hydrogen bonds between formhydroxamic acid dimer cation and decavanadate polyanion. Formhydroxamic acid dimer is got through controlling the condition of the reaction using formhydroxamic acid.
文摘A new decavanadate, (C4N2H7)4(C6N2H10)V10O28·2H2O, was synthesized by slow evaporation at room temperature and characterized by single crystal X-ray diffraction, IR and UV-Vis spectroscopies. The compound crystallizes in the triclinic system, P-1 space group with the cell parameters: a = 11.200(5) Å, b = 12.056(9) Å, c =20.511(7) Å, α = 73.40(4), β = 84.67(3), γ = 63.51(5), Z = 2 and volume V = 2373.7(1) Å3. The formula unit is composed of one decavanadate [V10O28]6- anion, four 2-methylimidazolium (C4N2H7)+ cations, one 2-amino-4-picolinium (C6N2H10)2+ cation and two water molecules. In the crystal, the layers of decavanadate groups, organic cations and water molecules stack up parallel to the (011) plane. The cohesion is provided by N-H···O, O-H···O hydrogen bonds and Van der Waals interactions leads to a three-dimensional structure. The absorbance spectrum measurement shows an optical band gap of 3.27 eV which allows us to conclude that this compound is a semiconductor material.
