One novel nickel coordination polymer, {[Ni(OTP)(bib)1.5(H2O)]·2H2O}n(1, H2 OTP = 2-hydroxy-5-(3',5'-terephthalic acid) pyridine, bib = 1,4-bis(1-imdazoly)benzene), has been synthesized and characte...One novel nickel coordination polymer, {[Ni(OTP)(bib)1.5(H2O)]·2H2O}n(1, H2 OTP = 2-hydroxy-5-(3',5'-terephthalic acid) pyridine, bib = 1,4-bis(1-imdazoly)benzene), has been synthesized and characterized by elemental analysis(EA), IR, powder X-ray diffraction(PXRD), and thermogravimetric(TG) analyses. The crystal of 1 crystallizes in monoclinic, space group P21/n with a = 12.2860(5), b = 13.8246(6), c = 19.0140(8) A, β = 104.3870(1)°, V = 3128.2(2) A3, Z = 4, C32H28N7 Ni O8, Mr = 697.32, Dc = 1.481 g/cm^3, F(000) = 1444 and μ(Mo Kα) = 0.684 mm-1. The final R = 0.0704 and w R = 0.1764 for 5485 observed reflections with I 2σ(I) and R = 0.1087 and wR = 0.2010 for all data. Topology analysis reveals that complex 1 is a 3D 2-fold interpenetrated {4^4·6^6}-nov net based on the 1D [Ni(OTP)]n chain and the 2D [Ni2(bib)3]n sql sheet. And the variable-temperature magnetic susceptibility measurements exhibit weak antiferromagnetic coupling interaction.展开更多
A new 3-D nickel(Ⅱ) metal-organic framework(MOFs) with formula [Ni(bib)_2(SO_4)]_n(1), where bib = 1,4-bis(imidazol-1-yl)benzene, has been synthesized and characterized by single-crystal X-ray diffraction...A new 3-D nickel(Ⅱ) metal-organic framework(MOFs) with formula [Ni(bib)_2(SO_4)]_n(1), where bib = 1,4-bis(imidazol-1-yl)benzene, has been synthesized and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis and surface photovoltage spectroscopy(SPS). Complex 1 crystallizes in monoclinic system, space group C2/c with a = 19.5988(6), b = 9.7531(3), c = 11.8146(4) ?, β = 96.185(3)°, V = 2245.20(12) ?~3, C_(24)H_(20)N_8NiO_4S, M_r = 575.25, D_c = 1.702 g/cm^3, Z = 4, F(000) = 1184, μ = 1.011 mm-1, the final R = 0.0293 and w R = 0.0702. X-ray diffraction analyses indicated that the center Ni^(2+) ion is six-coordinated with an O_2N_4 donor set of two μ_2-SO_4^(2–) and four bib ligands, resulting in an ideal octahedral geometry. Topological analysis on complex 1 considers each Ni^(2+) as a 6-connected node, while bib and sulfate ion as linkers, giving an α-Po topology with short Schl?fli symbol 412·63. In the crystal packing, the components interact with pairs of intermolecular C–H×××O hydrogen bonds. The SPS of 1 indicates that there are positive response bands in the range of 300~600 nm showing photo-electric conversion properties.展开更多
A Zn(Ⅱ) supramolecular coordination polymer, {[Zn2(L)2(m-bix)(H20)]6H2O}n(1), with an interesting 1D→2D polythreading array from a flexible and angular organic aromaticpolycarboxylate ligand 5-(4-hydroxyp...A Zn(Ⅱ) supramolecular coordination polymer, {[Zn2(L)2(m-bix)(H20)]6H2O}n(1), with an interesting 1D→2D polythreading array from a flexible and angular organic aromaticpolycarboxylate ligand 5-(4-hydroxypyridinium-l-ylmethyl)isophthalic acid (H2L), and N-donorligand 1,3-bis(imidazol-l-ylmethyl)benzene (m-bix), has been obtained under hydrothermalconditions and characterized by elemental analysis, powder X-ray diffraction (PXRD), IR, thermalgravimetric analyses (TGA) and single-crystal X-ray diffraction. In 1, the Zn(Ⅱ) center has twocoordination geometries. One exhibits a trigonal bipyramidal coordination sphere, and the other isa tetrahedral geometry; L2- has two different coordination modes, with one connecting three Zn(Ⅱ)ions through two monodentate carboxylate groups and the monodentate hydroxyl group, and theother bridging two Zn(Ⅱ) ions through two carboxylate groups. The L2- anions connect the Zn(Ⅱ)centers forming an infinite 1D tubular structure. These 1D tubes are interconnected by the m-bixspacers to form a 2D framework. Such 2D layers are further assembled into a 3D supramolecularnetwork via hydrogen bonds. Meanwhile, the luminescent property of 1 has also been investigatedin detail.展开更多
Three new different dimensional coordination polymers, namely, [Zn(BA-)2(4,4?-bib)-1.5]n(1), [Zn(4-Br BA-)2(1,4-bmb)]n(2) and [Mn(4-Br BA)2(4,4?-bib)]n(3) have been assembled through the mixed-liga...Three new different dimensional coordination polymers, namely, [Zn(BA-)2(4,4?-bib)-1.5]n(1), [Zn(4-Br BA-)2(1,4-bmb)]n(2) and [Mn(4-Br BA)2(4,4?-bib)]n(3) have been assembled through the mixed-ligand synthetic strategy(4-HBr BA = 4-bromobenzoic acid, HBA = benzoic acid, 1,4-bmb = 1,4-bis(1 H-imidazol-4-yl)benzene, 4,4?-bib = 4,4?-bis(imidazolyl)biphenyl). Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by elemental analyses(EA), powder X-ray diffraction(PXRD), and thermogravimetric(TG) analyses. Single-crystal X-ray diffraction analysis reveals that the crystals of complexes 1~3 are all in triclinic systems, space group P1. Complexes 1 and 2 are 0D binuclear structures, and 3 is a 1 D chain. Moreover, the solid state fluorescence properties of 1 and 2 have been investigated.展开更多
Hydrothermal assembly of Co2+ ion, a bis-imidazole ligand BIMB(BIMB = 1,4-bis(imidazol-1-yl)benzene) and a rigid bidentate linker 2,6-naphthalenedicarboxylic acid(H2ndc), yields a novel three-dimensional(3D) ...Hydrothermal assembly of Co2+ ion, a bis-imidazole ligand BIMB(BIMB = 1,4-bis(imidazol-1-yl)benzene) and a rigid bidentate linker 2,6-naphthalenedicarboxylic acid(H2ndc), yields a novel three-dimensional(3D) self-penetrating coordination polymer {[Co(BIMB)(ndc)]·H2O}n(1). Complex 1 exhibits {6~5.8} topology and contains a 2D → 3D parallel polycatenated substructure. In addition, solid-state UV-vis absorption spectra of 1 were also investigated.展开更多
基金supported by the Natural Science Foundation of Shandong Province(ZR2011BL020,ZR2012CM019)National Natural Science Foundation of China(21451001)Key Discipline and Innovation Team of Qilu Normal University
文摘One novel nickel coordination polymer, {[Ni(OTP)(bib)1.5(H2O)]·2H2O}n(1, H2 OTP = 2-hydroxy-5-(3',5'-terephthalic acid) pyridine, bib = 1,4-bis(1-imdazoly)benzene), has been synthesized and characterized by elemental analysis(EA), IR, powder X-ray diffraction(PXRD), and thermogravimetric(TG) analyses. The crystal of 1 crystallizes in monoclinic, space group P21/n with a = 12.2860(5), b = 13.8246(6), c = 19.0140(8) A, β = 104.3870(1)°, V = 3128.2(2) A3, Z = 4, C32H28N7 Ni O8, Mr = 697.32, Dc = 1.481 g/cm^3, F(000) = 1444 and μ(Mo Kα) = 0.684 mm-1. The final R = 0.0704 and w R = 0.1764 for 5485 observed reflections with I 2σ(I) and R = 0.1087 and wR = 0.2010 for all data. Topology analysis reveals that complex 1 is a 3D 2-fold interpenetrated {4^4·6^6}-nov net based on the 1D [Ni(OTP)]n chain and the 2D [Ni2(bib)3]n sql sheet. And the variable-temperature magnetic susceptibility measurements exhibit weak antiferromagnetic coupling interaction.
基金supported by the Guangxi Provincial Department of Education(No.KY2015ZD130,YB2014414)the Natural Science Foundation of Guangxi Province(No.2014GXNSFBA118040)+2 种基金The supports of the National Natural Science Foundation of China(No.51402158)are gratefully acknowledgedthe financial support by the Opening Project of Guangxi Colleges and Universities Key Laboratory of Beibu Gulf Oil and Natural Gas Resource Effective Utilization(No.2015KLOG09)the financial support from the Natural Science Foundation of Qinzhou University(No.2014PY-GJ05)
文摘A new 3-D nickel(Ⅱ) metal-organic framework(MOFs) with formula [Ni(bib)_2(SO_4)]_n(1), where bib = 1,4-bis(imidazol-1-yl)benzene, has been synthesized and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental analysis and surface photovoltage spectroscopy(SPS). Complex 1 crystallizes in monoclinic system, space group C2/c with a = 19.5988(6), b = 9.7531(3), c = 11.8146(4) ?, β = 96.185(3)°, V = 2245.20(12) ?~3, C_(24)H_(20)N_8NiO_4S, M_r = 575.25, D_c = 1.702 g/cm^3, Z = 4, F(000) = 1184, μ = 1.011 mm-1, the final R = 0.0293 and w R = 0.0702. X-ray diffraction analyses indicated that the center Ni^(2+) ion is six-coordinated with an O_2N_4 donor set of two μ_2-SO_4^(2–) and four bib ligands, resulting in an ideal octahedral geometry. Topological analysis on complex 1 considers each Ni^(2+) as a 6-connected node, while bib and sulfate ion as linkers, giving an α-Po topology with short Schl?fli symbol 412·63. In the crystal packing, the components interact with pairs of intermolecular C–H×××O hydrogen bonds. The SPS of 1 indicates that there are positive response bands in the range of 300~600 nm showing photo-electric conversion properties.
基金supported by Education Chamber of Henan Province(No.15A150068)
文摘A Zn(Ⅱ) supramolecular coordination polymer, {[Zn2(L)2(m-bix)(H20)]6H2O}n(1), with an interesting 1D→2D polythreading array from a flexible and angular organic aromaticpolycarboxylate ligand 5-(4-hydroxypyridinium-l-ylmethyl)isophthalic acid (H2L), and N-donorligand 1,3-bis(imidazol-l-ylmethyl)benzene (m-bix), has been obtained under hydrothermalconditions and characterized by elemental analysis, powder X-ray diffraction (PXRD), IR, thermalgravimetric analyses (TGA) and single-crystal X-ray diffraction. In 1, the Zn(Ⅱ) center has twocoordination geometries. One exhibits a trigonal bipyramidal coordination sphere, and the other isa tetrahedral geometry; L2- has two different coordination modes, with one connecting three Zn(Ⅱ)ions through two monodentate carboxylate groups and the monodentate hydroxyl group, and theother bridging two Zn(Ⅱ) ions through two carboxylate groups. The L2- anions connect the Zn(Ⅱ)centers forming an infinite 1D tubular structure. These 1D tubes are interconnected by the m-bixspacers to form a 2D framework. Such 2D layers are further assembled into a 3D supramolecularnetwork via hydrogen bonds. Meanwhile, the luminescent property of 1 has also been investigatedin detail.
基金Supported by the National Natural Science Foundation of China(No.21451001)the Key Discipline,Innovation Team,and Key Lab.of Qilu Normal University
文摘Three new different dimensional coordination polymers, namely, [Zn(BA-)2(4,4?-bib)-1.5]n(1), [Zn(4-Br BA-)2(1,4-bmb)]n(2) and [Mn(4-Br BA)2(4,4?-bib)]n(3) have been assembled through the mixed-ligand synthetic strategy(4-HBr BA = 4-bromobenzoic acid, HBA = benzoic acid, 1,4-bmb = 1,4-bis(1 H-imidazol-4-yl)benzene, 4,4?-bib = 4,4?-bis(imidazolyl)biphenyl). Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by elemental analyses(EA), powder X-ray diffraction(PXRD), and thermogravimetric(TG) analyses. Single-crystal X-ray diffraction analysis reveals that the crystals of complexes 1~3 are all in triclinic systems, space group P1. Complexes 1 and 2 are 0D binuclear structures, and 3 is a 1 D chain. Moreover, the solid state fluorescence properties of 1 and 2 have been investigated.
基金Supported by the National Natural Science Foundation of China(Nos.21361023 and 21461023)
文摘Hydrothermal assembly of Co2+ ion, a bis-imidazole ligand BIMB(BIMB = 1,4-bis(imidazol-1-yl)benzene) and a rigid bidentate linker 2,6-naphthalenedicarboxylic acid(H2ndc), yields a novel three-dimensional(3D) self-penetrating coordination polymer {[Co(BIMB)(ndc)]·H2O}n(1). Complex 1 exhibits {6~5.8} topology and contains a 2D → 3D parallel polycatenated substructure. In addition, solid-state UV-vis absorption spectra of 1 were also investigated.