A new three-dimensional (3D) lanthanide-aromatic monocarboxylate dimer supramolecular network [La2(DNBA)4(DMF)8][W6O19] (DNBA=3,5-dinitrobenzoate, DMF=dimethylfomamide) was synthesized using hexatungstate anion (W6O19...A new three-dimensional (3D) lanthanide-aromatic monocarboxylate dimer supramolecular network [La2(DNBA)4(DMF)8][W6O19] (DNBA=3,5-dinitrobenzoate, DMF=dimethylfomamide) was synthesized using hexatungstate anion (W6O192-) as template. The crystal structure of the title compound has been determined by single-crystal X-ray diffraction. It crystallizes in triclinic, space group P1 with a=1.334 54(18) nm, b=1.387 52(19) nm, c=1.426 06(19) nm, α=102.189(2)°, β=101.023(2)°, γ=116.349(2)°, V=2.187 2(5) nm3, Dc=2.364 g·cm-3, Z=1, F(000)=1 453.40. The single crystal structure reveals that two La髥 ions are bridged by four 3,5-dinitrobenzoate anions as asymmetrically bridging ligands, leading to dimeric cores, [La2(DNBA)4(DMF)8]2+; [La2(DNBA)4(DMF)8]2+ groups are joined together by π-π stacking interaction between the aromatic groups to form a two-dimensional grid-like network; the 2D supramolecular layers are further extended into 3D supramolecular network with a 1D box-like channels by hydrogen bonding interactions, in which hexatungstate polyanions reside. CCDC: 284694.展开更多
以氯化钴、对叔丁基磺酰杯[4]芳烃(H4TC4A-SO2)和非对称性3-(1H-四唑-5-基)苯甲酸(H2L)为原料,通过溶剂热法合成了一个具有四面体配位笼结构的16核化合物[Co16(TC4A-SO2)4(OH)4(L)8]·[(C8H20N)(C4H12N)2(C2H8N)]·solvent(Co16...以氯化钴、对叔丁基磺酰杯[4]芳烃(H4TC4A-SO2)和非对称性3-(1H-四唑-5-基)苯甲酸(H2L)为原料,通过溶剂热法合成了一个具有四面体配位笼结构的16核化合物[Co16(TC4A-SO2)4(OH)4(L)8]·[(C8H20N)(C4H12N)2(C2H8N)]·solvent(Co16-TC4A-SO2).采用X射线单晶衍射、X射线粉末衍射、热重分析、红外光谱方法对配合物进行了表征.将Co16-TC4A-SO2笼簇直接负载到碳纸上(Co16-TC4A-SO2/CP)用作工作电极,其对析氧反应(OER)展现出较好的催化性能.在1 mol/L KOH中,Co16-TC4A-SO2/CP在343.8 m V的过电位下达到10.0 m A/cm^2电流密度,Tafel斜率为79.31 m V/dec,并且在20.0 m A/cm2电流密度下表现出长达48 h的催化稳定性.展开更多
A unique metal-organic framework（MOF） [Eu_2（L）_3（phen）_2]_n（1, H_2L = 4,6-dibenzoylisophthalic acid, phen = 1,10-phenanthroline） has been synthesized under hydrothermal conditions and characterized by single-c...A unique metal-organic framework（MOF） [Eu_2（L）_3（phen）_2]_n（1, H_2L = 4,6-dibenzoylisophthalic acid, phen = 1,10-phenanthroline） has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray analysis, elemental analyses, powder X-ray diffraction, TGA measurement as well as IR spectra. The crystal is of triclinic system, space group P1, C_（90）H_（52）Eu_2N_4O_（18）, M_r = 1781.32, a = 9.8697（4）, b = 16.7466（6）, c = 22.2556（10） A, α = 87.113（3）, β = 77.575（5）, γ = 89.458（3）°, V = 3587.8（3） A^3, Z = 2, D_c = 1.649 g/cm^3, F（000） = 1780, μ（MoKα） = 1.813 mm^（-1）, Rint = 0.0181, R = 0.0260 and wR = 0.0592 for 14000 observed reflections with I 〉 2σ（I）. X-ray analysis shows that the title compound exhibits a 2D layer structure linked by L ligands with two coordination modes and two distinguished conformations, and further linked into a 3D supramolecular architecture through C-H···O weak interactions between hydrogen of phen phenyl ring and the carboxylate oxygen atom of adjacent sheets. In addition, the luminescence property of 1 was investigated.展开更多
文摘A new three-dimensional (3D) lanthanide-aromatic monocarboxylate dimer supramolecular network [La2(DNBA)4(DMF)8][W6O19] (DNBA=3,5-dinitrobenzoate, DMF=dimethylfomamide) was synthesized using hexatungstate anion (W6O192-) as template. The crystal structure of the title compound has been determined by single-crystal X-ray diffraction. It crystallizes in triclinic, space group P1 with a=1.334 54(18) nm, b=1.387 52(19) nm, c=1.426 06(19) nm, α=102.189(2)°, β=101.023(2)°, γ=116.349(2)°, V=2.187 2(5) nm3, Dc=2.364 g·cm-3, Z=1, F(000)=1 453.40. The single crystal structure reveals that two La髥 ions are bridged by four 3,5-dinitrobenzoate anions as asymmetrically bridging ligands, leading to dimeric cores, [La2(DNBA)4(DMF)8]2+; [La2(DNBA)4(DMF)8]2+ groups are joined together by π-π stacking interaction between the aromatic groups to form a two-dimensional grid-like network; the 2D supramolecular layers are further extended into 3D supramolecular network with a 1D box-like channels by hydrogen bonding interactions, in which hexatungstate polyanions reside. CCDC: 284694.
文摘以氯化钴、对叔丁基磺酰杯[4]芳烃(H4TC4A-SO2)和非对称性3-(1H-四唑-5-基)苯甲酸(H2L)为原料,通过溶剂热法合成了一个具有四面体配位笼结构的16核化合物[Co16(TC4A-SO2)4(OH)4(L)8]·[(C8H20N)(C4H12N)2(C2H8N)]·solvent(Co16-TC4A-SO2).采用X射线单晶衍射、X射线粉末衍射、热重分析、红外光谱方法对配合物进行了表征.将Co16-TC4A-SO2笼簇直接负载到碳纸上(Co16-TC4A-SO2/CP)用作工作电极,其对析氧反应(OER)展现出较好的催化性能.在1 mol/L KOH中,Co16-TC4A-SO2/CP在343.8 m V的过电位下达到10.0 m A/cm^2电流密度,Tafel斜率为79.31 m V/dec,并且在20.0 m A/cm2电流密度下表现出长达48 h的催化稳定性.
基金supported by the NNSFC(No.21301170)Xiaonei Foundation of Changchun University of Technology
文摘A unique metal-organic framework（MOF） [Eu_2（L）_3（phen）_2]_n（1, H_2L = 4,6-dibenzoylisophthalic acid, phen = 1,10-phenanthroline） has been synthesized under hydrothermal conditions and characterized by single-crystal X-ray analysis, elemental analyses, powder X-ray diffraction, TGA measurement as well as IR spectra. The crystal is of triclinic system, space group P1, C_（90）H_（52）Eu_2N_4O_（18）, M_r = 1781.32, a = 9.8697（4）, b = 16.7466（6）, c = 22.2556（10） A, α = 87.113（3）, β = 77.575（5）, γ = 89.458（3）°, V = 3587.8（3） A^3, Z = 2, D_c = 1.649 g/cm^3, F（000） = 1780, μ（MoKα） = 1.813 mm^（-1）, Rint = 0.0181, R = 0.0260 and wR = 0.0592 for 14000 observed reflections with I 〉 2σ（I）. X-ray analysis shows that the title compound exhibits a 2D layer structure linked by L ligands with two coordination modes and two distinguished conformations, and further linked into a 3D supramolecular architecture through C-H···O weak interactions between hydrogen of phen phenyl ring and the carboxylate oxygen atom of adjacent sheets. In addition, the luminescence property of 1 was investigated.
