The complex [Ni(L)(N3)2](H_2O (L=N,N(-Bis(2-pyridylaldehyde) condensation 1,3-diaminopropane) was synthesized by the reaction of NiCl2(6H_2O with 2-pyridylaldehyde and 1,3-diaminopropane and sodium azide in the ethan...The complex [Ni(L)(N3)2](H_2O (L=N,N(-Bis(2-pyridylaldehyde) condensation 1,3-diaminopropane) was synthesized by the reaction of NiCl2(6H_2O with 2-pyridylaldehyde and 1,3-diaminopropane and sodium azide in the ethanol. A single-crystal X-ray study shows that the complex is a six-coordinated nickel (II) with an octahedral environment compound (C15H18N10NiO). The crystal is orthogonal, space group Pbca, with unit cell parameters: a = 13.577(3), b = 15.261(3), c = 17.554(4) ?, V= 3637(1) ?3, Z=8, Mr=413.10, Dc=1.509 g/cm3, ( = 1.096 mm－1, F(000) = 1712, T = 293(2)K, R = 0.0411, wR = 0.1048 for 2888 reflections with I >2( (I). The distances between Ni and N atoms (N(1), N(2), N(3), N(4)) range from 2.050(2) to 2.140(2)?. The distances of Ni-N(5) and Ni-N(8) are 2.115(3) and 2.133(3)?, respectively. The solvent molecule H_2O(O(1)) is linked by hydrogen bonds with O(1) and N(5) and N(8) atoms. Their distances are 2.881(+x, +y, +z) and 2.893(0.5+x, y, 0.5+z)?, respectively.展开更多
A new mixed-ligand nickel（Ⅱ） complex, [Ni（L）（DCA）（H2O）]·2H2O （L = C8H9N3, 2-aminomethyl-benzimidazole, DCA2- = 7-oxabicyclo[2,2,1]heptane-2,3-dicarboxylate, demethylcantharate, C8H8O5）, has been synthe...A new mixed-ligand nickel（Ⅱ） complex, [Ni（L）（DCA）（H2O）]·2H2O （L = C8H9N3, 2-aminomethyl-benzimidazole, DCA2- = 7-oxabicyclo[2,2,1]heptane-2,3-dicarboxylate, demethylcantharate, C8H8O5）, has been synthesized and characterized. The structure of the complex was determined by single-crystal X-ray diffraction. It is of monoclinic system, space group P21/c with a = 7.7211（7）, b = 12.0799（12）, c = 19.7867（19）, β = 100.390（6）°, V = 1815.2（3） nm3, Dc = 1.625 g·cm-3, Ζ = 4, F（000） = 928, R = 0.0314 and wR = 0.0822. In addition, the interaction between the complex and DNA was studied by means of fluorescence spectra and viscosity. The results indicate that the complex binds to DNA by the mode of partial intercalation with the Stern-Volmer constants Ksv of 3.81 × 104 mol·L-1.展开更多
A fluorescent Ni（II） complex 1, [Ni（OH-H2Bdc）（Bibimp）]n·nH2O, constructed with 5-hydroxyisophthalic acid（OH-H2Bdc） and 2,6-bis（2-benzimidazolyl）pyridine）（Bibimp） has been synthesized by hydrothermal ...A fluorescent Ni（II） complex 1, [Ni（OH-H2Bdc）（Bibimp）]n·nH2O, constructed with 5-hydroxyisophthalic acid（OH-H2Bdc） and 2,6-bis（2-benzimidazolyl）pyridine）（Bibimp） has been synthesized by hydrothermal methods and structurally characterized by elemental analysis, IR spectroscopy, TG/DTG, fluorescence spectrum and single-crystal X-ray diffraction. The title complex crystallizes in triclinic system, space group P1 with a = 10.187（2）, b = 10.273（2）, c = 13.401（3）A, α = 69.65（3）, β = 69.66（3）, γ = 70.61（3）°, V = 1196.8（4） A3, and Z = 2. The adjacent chains of complex 1 are stacked offset with respect to each other in an ABAB fashion by van der Waals interactions, and only a weak interlayer nonclassical C–H…O hydrogen bond has been observed. Complex 1 displays strong blue fluorescent emissions at 483 nm in the solid state upon photo-excitation at 365 nm at room temperature.展开更多
A novel nickel(II) complex with 2,4-dihydroxybenzalidene benzoylhydrazone a nd pyridine ligands, Ni(C14H10N2O3)(C5H5N), has been synthesized and characteriz ed by elemental analysis and IR. The crystal structure of th...A novel nickel(II) complex with 2,4-dihydroxybenzalidene benzoylhydrazone a nd pyridine ligands, Ni(C14H10N2O3)(C5H5N), has been synthesized and characteriz ed by elemental analysis and IR. The crystal structure of the title complex has been determined by single crystal X-ray diffraction techniques. The crystal belo ngs to orthorhombic, space group Pbca. The cell parameters are: a=1.580 20(19) n m, b=1.362 18(16) nm, c=1.616 50(19) nm, and V=3.479 5(7) nm3, Z=8, Dc=1.497 Mg ·m-3, composed of two oxygen atoms, one n itrogen atom of tridentate acyhydrazone schiff base ligand and one nitrogen atom of the pyridine ligand. The analysis of the crystal structure indicates that th e complex has a one-dimensional chain structure, which is formed by intermolecul ar hydrogen bonds. CCDC: 244668.展开更多
A nickel(II) complex Ni(DPBP-SAH)2·2CH3CH2OH, (DPBP-SAH=N-(1,3-diphenyl-4-benzylidene-5-pyrazolone)-salicylidene hydrazone), has been synthesized and characterized by elemental analyses, IR spectra and single cry...A nickel(II) complex Ni(DPBP-SAH)2·2CH3CH2OH, (DPBP-SAH=N-(1,3-diphenyl-4-benzylidene-5-pyrazolone)-salicylidene hydrazone), has been synthesized and characterized by elemental analyses, IR spectra and single crystal X-ray diffraction. It belongs to monoclinic, space group C2/c with a=2.737 9(4) nm, b=1.249 2(2) nm, c=1.760 8(2) nm, β=120.212(9)°, Mr=1 065.84, V=5.204(1) nm3, Z=4. The X-ray diffraction reveals that the nickel(II) ion in the title complex is in a slightly distorted octahedral arrangement of the ON donor atoms of two DPBP-SAH and two O-donor atoms in ethanol. CCDC: 249394.展开更多
Metal skeletons,such as Nickel Foam(NF) has attracted worldwide interests as stable host for lithium metal anode because of its high stability,large specific surface area and high conductivity.However,most metal skele...Metal skeletons,such as Nickel Foam(NF) has attracted worldwide interests as stable host for lithium metal anode because of its high stability,large specific surface area and high conductivity.However,most metal skeletons have lithophobic surface and uneven current distribution that result in sporadic lithium nucleation and uncontrolled dendrites growth.Herein,we describe a sequential immersing strategy to generate interwoven Nickel(Ⅱ)-dimethylglyoxime(Ni-DMG) nanowires at NF to obtain composite skeleton(NDNF),which can be used as an stable host for Li metal storage.The Ni-DMG has proved effective to realize uniform lithium nucleation and dendrite-free lithium deposition.Combing with the three dimensional(3 D) hierarchical porous structure,the composite host shows a significantly improved coulombic efficiency(CE) than pristine commercial nickel foam.Moreover,the corresponding Li‖Li symmetrical cells can run more than 700 h with low voltage hysteresis 22 mV at 1.0 mA/cm^(2),and Li@NDNF‖LiFePO;full-cell exhibits a high capacity retention of 82.03% at 1.0 C during 630 cycles.These results proved the effectiveness of metal-organic complexes in governing Li metal growth and can be employed as a new strategy for dendrite-free Li metal anode and safe Li metal batteries(LMBs).展开更多
A new complex, [Ni3（L）2（BTA）2]·2H2O （1, L = 1,4-di（1H-imidazol-4-yl）benzene, H3BTA = benzene-1,3,5-triacetic acid）, has been hydrothermally prepared and characterized by single-crystal X-ray diffraction, ...A new complex, [Ni3（L）2（BTA）2]·2H2O （1, L = 1,4-di（1H-imidazol-4-yl）benzene, H3BTA = benzene-1,3,5-triacetic acid）, has been hydrothermally prepared and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis, TG and PXRD. The complex crystallizes in monoclinic, space group P1 with a = 9.0303（12）, b = 10.0796（13）, c = 12.7966（17） A, a = 99.268（2）, β= 94.490（2）, y = 103.722（3）°, V = 1108.5（3） A3, Z = 2, C48HasNsO14Ni3, Mr= 1126.99, Dc = 1.688 g/cm3, p = 1.344 mm1, S = 1.001, F（000） = 578, the final R = 0.0389 and wR = 0.0895 for 3083 observed reflections （I 〉 2σ（I））. In the title complex, the flexible BTA3- ligands utilize oxygen atoms of carboxylate groups to coordinate with Ni（II） ions to form two-dimensional double-layer networks which are further pillared into a three-dimension framework via the rigid ditopic ligand L. Topological analysis revealed that complex 1 is a typical （3,8）-connected tfz-d 3D network based on the trinuclear [Ni3（CO2）6N4] subunits.展开更多
A novel chiral Nickel (II) complex of N-(2-pyridylmethyl)-L-alanine (Hpyala) <b>1</b> has been prepared and structurally characterized by elemental analysis, FT-IR, UV-visible, TGA and single crystal X-ray...A novel chiral Nickel (II) complex of N-(2-pyridylmethyl)-L-alanine (Hpyala) <b>1</b> has been prepared and structurally characterized by elemental analysis, FT-IR, UV-visible, TGA and single crystal X-ray diffraction techniques. Complex <b>1</b> crystallizes in an orthorhombic P2<sub>1</sub>2<sub>1</sub>2<sub>1</sub> space group. The nickel (II) centre in the complex adopts a distorted octahedral geometry. This compound has been seen to exhibit structural diversity resulting from the number of lattice water molecules. The photoluminescent properties of this compound which have also been investigated, indicates the potential application in luminescence.展开更多
The title complex, C18H15N3NiO3, has been prepared and characterized by X-ray diffraction analysis. It crystallizes in the monoclinic system, space group Cc with a = 10.939(2), b = 22.909(5), c = 6.907(1) ?, β = 11...The title complex, C18H15N3NiO3, has been prepared and characterized by X-ray diffraction analysis. It crystallizes in the monoclinic system, space group Cc with a = 10.939(2), b = 22.909(5), c = 6.907(1) ?, β = 116.75(3)°, V = 1545.7(5) ?, Z = 4, Mr = 380.04, F(000) = 784, Dc = 1.633 g/cm3 and μ(MoKα) = 1.279 mm–1. The structure was refined to R = 0.0472 and wR = 0.0893 for 2571 observed reflections with I > 2σ(I). The absolute structure Flack parameter X is 0.01(2). In this crystal structure, strong face-to-face π-π stacking interactions between adjacent molecules lead to a one-dimensional chain structure.展开更多
The title compound, [Ni（C8N3H7）3]4[Mo8O26]2·6H2O 1, has been synthesized from the reaction of 2-（1H-pyrazol-3-yl）-pyridine （L） with （NH4）2MoO4·2H2O and NiCl2·6H2O. Elemental analysis, IR, UV spe...The title compound, [Ni（C8N3H7）3]4[Mo8O26]2·6H2O 1, has been synthesized from the reaction of 2-（1H-pyrazol-3-yl）-pyridine （L） with （NH4）2MoO4·2H2O and NiCl2·6H2O. Elemental analysis, IR, UV spectra and X-ray single-crystal diffraction were carried out to determine the composition and crystal structure of the compound. Crystal data： C96H96Mo16N36Ni4O58, Mr = 4451.97, monoclinic system, space group P21/n, a = 20.846（5）, b = 14.825（5）, c = 23.122（5） A ,β= 91.594（5）°, V = 7143（3）A^3, Z = 2, F（000） = 4344, Dc = 2.070 g/cm^3,μ = 1.968 mm^-1, R = 0.0452 and wR = 0.1056 for 17102 independent reflections （Rint = 0.0442） and 11074 observed reflections （I 〉 2σ（I））. Structural analysis indicates that two kinds of octamolybdates （[α-Mo8026]^4- and [β-Mo8026]^4-） co-exist in the compound. This is the first example of a supramolecular structure containing L complex as well as both α- and β-octamolybdate clusters.展开更多
The crystal structure of the title complex, [NiL], has been determined by using X-ray analysis (H2L = 2,3-dioxo-5,6:13,14-dibenzo-7,12-bis(methoxycarbonyl)-1,4,8,11-tetraazacyclotetra- deca-7,11-diene). Crystal data: ...The crystal structure of the title complex, [NiL], has been determined by using X-ray analysis (H2L = 2,3-dioxo-5,6:13,14-dibenzo-7,12-bis(methoxycarbonyl)-1,4,8,11-tetraazacyclotetra- deca-7,11-diene). Crystal data: C22H18N4O6Ni, Mr = 493.11, triclinic, space group P, a = 9.128(6), b = 9.941(7), c = 12.396(8) ? a = 107.11(1), b = 106.14(1), g = 97.69(1), V = 1003.9(11) 3, Z = 2, Dc = 1.631 g/cm3, m(MoKa) = 1.018 mm-1, F(000) = 508, R = 0.0584 and wR = 0.0981 for 1724 observed reflections with I > 2s(I). The Ni(II) atom is coordinated by four nitrogen donors of the macrocyclic ligand with a slightly distorted square-planar geometry. In the crystal, the CH…O hydrogen bonds link the complex molecules to form infinite 1D chains which are further linked by p…p stacking interactions to form chain-pairs.展开更多
The title compound, [Ni(acac)2(Im)2] (acac = acetylacetone), has been obtained by the reaction of Ni(acac)2 with imidazole ligand in the ethanol solvent. The blue crystal is of triclinic, space group Pi with a = 7.472...The title compound, [Ni(acac)2(Im)2] (acac = acetylacetone), has been obtained by the reaction of Ni(acac)2 with imidazole ligand in the ethanol solvent. The blue crystal is of triclinic, space group Pi with a = 7.472(2), b = 9.456(2), c = 13.823(3) ? a = 85.55(3), = 89.03(3), ? = 80.63(3)o, C16H22N4NiO4, Mr = 393.09, V = 960.7(3) 3, Z = 2, Dc = 1.359 g/cm3, F(000) = 412, = 1.036 mm-1, R = 0.0549 and wR = 0.1615. The crystal structure consists of two disconnected structural units. Each Ni atom coordinated by two N atoms from two imidazole ligands and four O atoms from two acetylactone ligands adopts a slightly distorted octahedron. The structure characterization was performed by means of IR, UV, TG, elemental analysis and single-crystal X-ray analysis. The thermal gravity (TG) data indicate that thermal decomposition of the title compound takes place in two steps, and the residue is NiO.展开更多
A new ternary complex of nickel(II) with L-aspartate (L-Asp) and 1, 10-phenan- throline(Phen), [Ni3(L-Asp)(Phen)5(H2O)3](ClO4)4?4.75H2O, has been synthesized in a mixed sol- vent of H2OC2H5OH at the pH value of 3. I...A new ternary complex of nickel(II) with L-aspartate (L-Asp) and 1, 10-phenan- throline(Phen), [Ni3(L-Asp)(Phen)5(H2O)3](ClO4)4?4.75H2O, has been synthesized in a mixed sol- vent of H2OC2H5OH at the pH value of 3. It crystallizes in triclinic, space group P1 with a = 11.861(2), b = 18.384(4), c = 19.746(3) ?, α = 107.68(1), β = 105.94(1), γ = 103.41(2)°, V = 3703.6(11) ?3, Mr = 1745.66, Z = 2, Dc =1.565 g/cm3, μ = 0.989 mm-1, F(000) = 1791, R = 0.0643 and wR = 0.1611. The complex contains two cations, binuclear [Ni2(L-Asp)(Phen)3(H2O)]2+ and mononu- clear [Ni(Phen)2(H2O)2]2+. All the nickel ions in the complex are six-coordinated with a distorted octahedral geometry, but the coordination environments for them are different. There exist hydrogen bonds and π-π stacking interactions in the complex.展开更多
文摘The complex [Ni(L)(N3)2](H_2O (L=N,N(-Bis(2-pyridylaldehyde) condensation 1,3-diaminopropane) was synthesized by the reaction of NiCl2(6H_2O with 2-pyridylaldehyde and 1,3-diaminopropane and sodium azide in the ethanol. A single-crystal X-ray study shows that the complex is a six-coordinated nickel (II) with an octahedral environment compound (C15H18N10NiO). The crystal is orthogonal, space group Pbca, with unit cell parameters: a = 13.577(3), b = 15.261(3), c = 17.554(4) ?, V= 3637(1) ?3, Z=8, Mr=413.10, Dc=1.509 g/cm3, ( = 1.096 mm－1, F(000) = 1712, T = 293(2)K, R = 0.0411, wR = 0.1048 for 2888 reflections with I >2( (I). The distances between Ni and N atoms (N(1), N(2), N(3), N(4)) range from 2.050(2) to 2.140(2)?. The distances of Ni-N(5) and Ni-N(8) are 2.115(3) and 2.133(3)?, respectively. The solvent molecule H_2O(O(1)) is linked by hydrogen bonds with O(1) and N(5) and N(8) atoms. Their distances are 2.881(+x, +y, +z) and 2.893(0.5+x, y, 0.5+z)?, respectively.
基金Supported by the Natural Science Foundation of Zhejiang Province (Y407301)
文摘A new mixed-ligand nickel（Ⅱ） complex, [Ni（L）（DCA）（H2O）]·2H2O （L = C8H9N3, 2-aminomethyl-benzimidazole, DCA2- = 7-oxabicyclo[2,2,1]heptane-2,3-dicarboxylate, demethylcantharate, C8H8O5）, has been synthesized and characterized. The structure of the complex was determined by single-crystal X-ray diffraction. It is of monoclinic system, space group P21/c with a = 7.7211（7）, b = 12.0799（12）, c = 19.7867（19）, β = 100.390（6）°, V = 1815.2（3） nm3, Dc = 1.625 g·cm-3, Ζ = 4, F（000） = 928, R = 0.0314 and wR = 0.0822. In addition, the interaction between the complex and DNA was studied by means of fluorescence spectra and viscosity. The results indicate that the complex binds to DNA by the mode of partial intercalation with the Stern-Volmer constants Ksv of 3.81 × 104 mol·L-1.
文摘A fluorescent Ni（II） complex 1, [Ni（OH-H2Bdc）（Bibimp）]n·nH2O, constructed with 5-hydroxyisophthalic acid（OH-H2Bdc） and 2,6-bis（2-benzimidazolyl）pyridine）（Bibimp） has been synthesized by hydrothermal methods and structurally characterized by elemental analysis, IR spectroscopy, TG/DTG, fluorescence spectrum and single-crystal X-ray diffraction. The title complex crystallizes in triclinic system, space group P1 with a = 10.187（2）, b = 10.273（2）, c = 13.401（3）A, α = 69.65（3）, β = 69.66（3）, γ = 70.61（3）°, V = 1196.8（4） A3, and Z = 2. The adjacent chains of complex 1 are stacked offset with respect to each other in an ABAB fashion by van der Waals interactions, and only a weak interlayer nonclassical C–H…O hydrogen bond has been observed. Complex 1 displays strong blue fluorescent emissions at 483 nm in the solid state upon photo-excitation at 365 nm at room temperature.
文摘A novel nickel(II) complex with 2,4-dihydroxybenzalidene benzoylhydrazone a nd pyridine ligands, Ni(C14H10N2O3)(C5H5N), has been synthesized and characteriz ed by elemental analysis and IR. The crystal structure of the title complex has been determined by single crystal X-ray diffraction techniques. The crystal belo ngs to orthorhombic, space group Pbca. The cell parameters are: a=1.580 20(19) n m, b=1.362 18(16) nm, c=1.616 50(19) nm, and V=3.479 5(7) nm3, Z=8, Dc=1.497 Mg ·m-3, composed of two oxygen atoms, one n itrogen atom of tridentate acyhydrazone schiff base ligand and one nitrogen atom of the pyridine ligand. The analysis of the crystal structure indicates that th e complex has a one-dimensional chain structure, which is formed by intermolecul ar hydrogen bonds. CCDC: 244668.
文摘A nickel(II) complex Ni(DPBP-SAH)2·2CH3CH2OH, (DPBP-SAH=N-(1,3-diphenyl-4-benzylidene-5-pyrazolone)-salicylidene hydrazone), has been synthesized and characterized by elemental analyses, IR spectra and single crystal X-ray diffraction. It belongs to monoclinic, space group C2/c with a=2.737 9(4) nm, b=1.249 2(2) nm, c=1.760 8(2) nm, β=120.212(9)°, Mr=1 065.84, V=5.204(1) nm3, Z=4. The X-ray diffraction reveals that the nickel(II) ion in the title complex is in a slightly distorted octahedral arrangement of the ON donor atoms of two DPBP-SAH and two O-donor atoms in ethanol. CCDC: 249394.
基金financially supported by PULEAD Technology Industry Co.,Ltd.,the Strategic Priority Research Program of Chinese Academy of Sciences (No. XDB36000000)the National Key Research and Development Program of China (No. 2016YFA0200904)+3 种基金the National Natural Science Foundation of China (Nos. 21771018and 21875004)the Natural Science Foundation of Beijing (No.2192018)National Natural Science Foundation of China-Regional Innovation Joint Exploration Fund (No. U19A2019)Beijing University of Chemical Technology (Start-up grant No. buctrc201901,BUCT, China)。
文摘Metal skeletons,such as Nickel Foam(NF) has attracted worldwide interests as stable host for lithium metal anode because of its high stability,large specific surface area and high conductivity.However,most metal skeletons have lithophobic surface and uneven current distribution that result in sporadic lithium nucleation and uncontrolled dendrites growth.Herein,we describe a sequential immersing strategy to generate interwoven Nickel(Ⅱ)-dimethylglyoxime(Ni-DMG) nanowires at NF to obtain composite skeleton(NDNF),which can be used as an stable host for Li metal storage.The Ni-DMG has proved effective to realize uniform lithium nucleation and dendrite-free lithium deposition.Combing with the three dimensional(3 D) hierarchical porous structure,the composite host shows a significantly improved coulombic efficiency(CE) than pristine commercial nickel foam.Moreover,the corresponding Li‖Li symmetrical cells can run more than 700 h with low voltage hysteresis 22 mV at 1.0 mA/cm^(2),and Li@NDNF‖LiFePO;full-cell exhibits a high capacity retention of 82.03% at 1.0 C during 630 cycles.These results proved the effectiveness of metal-organic complexes in governing Li metal growth and can be employed as a new strategy for dendrite-free Li metal anode and safe Li metal batteries(LMBs).
基金supported by the National Natural Science Foundation of China(No.21171040)the Natural Science Foundation of Anhui Provincial Education Commission(No.KJ2011B128 and KJ2011B123)
文摘A new complex, [Ni3（L）2（BTA）2]·2H2O （1, L = 1,4-di（1H-imidazol-4-yl）benzene, H3BTA = benzene-1,3,5-triacetic acid）, has been hydrothermally prepared and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis, TG and PXRD. The complex crystallizes in monoclinic, space group P1 with a = 9.0303（12）, b = 10.0796（13）, c = 12.7966（17） A, a = 99.268（2）, β= 94.490（2）, y = 103.722（3）°, V = 1108.5（3） A3, Z = 2, C48HasNsO14Ni3, Mr= 1126.99, Dc = 1.688 g/cm3, p = 1.344 mm1, S = 1.001, F（000） = 578, the final R = 0.0389 and wR = 0.0895 for 3083 observed reflections （I 〉 2σ（I））. In the title complex, the flexible BTA3- ligands utilize oxygen atoms of carboxylate groups to coordinate with Ni（II） ions to form two-dimensional double-layer networks which are further pillared into a three-dimension framework via the rigid ditopic ligand L. Topological analysis revealed that complex 1 is a typical （3,8）-connected tfz-d 3D network based on the trinuclear [Ni3（CO2）6N4] subunits.
文摘A novel chiral Nickel (II) complex of N-(2-pyridylmethyl)-L-alanine (Hpyala) <b>1</b> has been prepared and structurally characterized by elemental analysis, FT-IR, UV-visible, TGA and single crystal X-ray diffraction techniques. Complex <b>1</b> crystallizes in an orthorhombic P2<sub>1</sub>2<sub>1</sub>2<sub>1</sub> space group. The nickel (II) centre in the complex adopts a distorted octahedral geometry. This compound has been seen to exhibit structural diversity resulting from the number of lattice water molecules. The photoluminescent properties of this compound which have also been investigated, indicates the potential application in luminescence.
基金The project was supported by the Education Department of Zhejiang Province (20030710)
文摘The title complex, C18H15N3NiO3, has been prepared and characterized by X-ray diffraction analysis. It crystallizes in the monoclinic system, space group Cc with a = 10.939(2), b = 22.909(5), c = 6.907(1) ?, β = 116.75(3)°, V = 1545.7(5) ?, Z = 4, Mr = 380.04, F(000) = 784, Dc = 1.633 g/cm3 and μ(MoKα) = 1.279 mm–1. The structure was refined to R = 0.0472 and wR = 0.0893 for 2571 observed reflections with I > 2σ(I). The absolute structure Flack parameter X is 0.01(2). In this crystal structure, strong face-to-face π-π stacking interactions between adjacent molecules lead to a one-dimensional chain structure.
基金supported by the National Natural Science Foundation of China (No. 20671016)Education Committee of Jilin Province "11th Five-year Plan" Natural Science Foundation (No. 2006124)
文摘The title compound, [Ni（C8N3H7）3]4[Mo8O26]2·6H2O 1, has been synthesized from the reaction of 2-（1H-pyrazol-3-yl）-pyridine （L） with （NH4）2MoO4·2H2O and NiCl2·6H2O. Elemental analysis, IR, UV spectra and X-ray single-crystal diffraction were carried out to determine the composition and crystal structure of the compound. Crystal data： C96H96Mo16N36Ni4O58, Mr = 4451.97, monoclinic system, space group P21/n, a = 20.846（5）, b = 14.825（5）, c = 23.122（5） A ,β= 91.594（5）°, V = 7143（3）A^3, Z = 2, F（000） = 4344, Dc = 2.070 g/cm^3,μ = 1.968 mm^-1, R = 0.0452 and wR = 0.1056 for 17102 independent reflections （Rint = 0.0442） and 11074 observed reflections （I 〉 2σ（I））. Structural analysis indicates that two kinds of octamolybdates （[α-Mo8026]^4- and [β-Mo8026]^4-） co-exist in the compound. This is the first example of a supramolecular structure containing L complex as well as both α- and β-octamolybdate clusters.
基金This work was supported by the National Natural Science Foundation of China (20071019, 50172021 and 90101028)
文摘The crystal structure of the title complex, [NiL], has been determined by using X-ray analysis (H2L = 2,3-dioxo-5,6:13,14-dibenzo-7,12-bis(methoxycarbonyl)-1,4,8,11-tetraazacyclotetra- deca-7,11-diene). Crystal data: C22H18N4O6Ni, Mr = 493.11, triclinic, space group P, a = 9.128(6), b = 9.941(7), c = 12.396(8) ? a = 107.11(1), b = 106.14(1), g = 97.69(1), V = 1003.9(11) 3, Z = 2, Dc = 1.631 g/cm3, m(MoKa) = 1.018 mm-1, F(000) = 508, R = 0.0584 and wR = 0.0981 for 1724 observed reflections with I > 2s(I). The Ni(II) atom is coordinated by four nitrogen donors of the macrocyclic ligand with a slightly distorted square-planar geometry. In the crystal, the CH…O hydrogen bonds link the complex molecules to form infinite 1D chains which are further linked by p…p stacking interactions to form chain-pairs.
基金This work was supported bythe Natural Science Foundation of Shandong Province (No. Y2002B06) and Science Research Foundation of Qingdao University of Science and Technology (No. 03Z08)
文摘The title compound, [Ni(acac)2(Im)2] (acac = acetylacetone), has been obtained by the reaction of Ni(acac)2 with imidazole ligand in the ethanol solvent. The blue crystal is of triclinic, space group Pi with a = 7.472(2), b = 9.456(2), c = 13.823(3) ? a = 85.55(3), = 89.03(3), ? = 80.63(3)o, C16H22N4NiO4, Mr = 393.09, V = 960.7(3) 3, Z = 2, Dc = 1.359 g/cm3, F(000) = 412, = 1.036 mm-1, R = 0.0549 and wR = 0.1615. The crystal structure consists of two disconnected structural units. Each Ni atom coordinated by two N atoms from two imidazole ligands and four O atoms from two acetylactone ligands adopts a slightly distorted octahedron. The structure characterization was performed by means of IR, UV, TG, elemental analysis and single-crystal X-ray analysis. The thermal gravity (TG) data indicate that thermal decomposition of the title compound takes place in two steps, and the residue is NiO.
基金This work was supported by the Natural Science Foundation of Guangxi Province (No. 9912044)
文摘A new ternary complex of nickel(II) with L-aspartate (L-Asp) and 1, 10-phenan- throline(Phen), [Ni3(L-Asp)(Phen)5(H2O)3](ClO4)4?4.75H2O, has been synthesized in a mixed sol- vent of H2OC2H5OH at the pH value of 3. It crystallizes in triclinic, space group P1 with a = 11.861(2), b = 18.384(4), c = 19.746(3) ?, α = 107.68(1), β = 105.94(1), γ = 103.41(2)°, V = 3703.6(11) ?3, Mr = 1745.66, Z = 2, Dc =1.565 g/cm3, μ = 0.989 mm-1, F(000) = 1791, R = 0.0643 and wR = 0.1611. The complex contains two cations, binuclear [Ni2(L-Asp)(Phen)3(H2O)]2+ and mononu- clear [Ni(Phen)2(H2O)2]2+. All the nickel ions in the complex are six-coordinated with a distorted octahedral geometry, but the coordination environments for them are different. There exist hydrogen bonds and π-π stacking interactions in the complex.
