A new coordination polymer, namely [Ca（HOABDC）], （1, H3OABDC = 5-oxyace- tateisophthalic acid）, has been synthesized through hydrothermal reactions of Ca（NO3）2 and H3OABDC. The title compound crystallizes in mon...A new coordination polymer, namely [Ca（HOABDC）], （1, H3OABDC = 5-oxyace- tateisophthalic acid）, has been synthesized through hydrothermal reactions of Ca（NO3）2 and H3OABDC. The title compound crystallizes in monoclinic, space group P21/c with a = 4.3043（2）, b = 21.4959（11）, c = 10.7450（6） A, β= 91.411（5）°, V= 993.88（9） A3, C10H6O7Ca, Mr = 278.23, Z = 4, Dc = 1.859 g/cm3, F（000） = 560,μ= 0.659 mm-1, the final R = 0.0328 and wR = 0.0670 for 1469 observed reflections （I 〉 2o（I））. Single-crystal X-ray structural analysis reveals that compound 1 features 1D Ca（II）-carboxylate chain-shaped subunits, which are further connected together via HOABDC2- ligands into a 3D （6,）-connected nia-type hybrid framework. Moreover, the luminescent property and thermal stability of 1 were also investigated展开更多
By the reaction of different aromatic dicarboxylic acid with zinc nitrate, three metal-carboxylate frameworks, [Zn3（BDC）3（EtOH）2]（1）, [Zn3（BDC）3（py）2]·2DMF（2）, and [Zn3（NH2-BDC）3（H2O）2]·5DMF...By the reaction of different aromatic dicarboxylic acid with zinc nitrate, three metal-carboxylate frameworks, [Zn3（BDC）3（EtOH）2]（1）, [Zn3（BDC）3（py）2]·2DMF（2）, and [Zn3（NH2-BDC）3（H2O）2]·5DMF（3） which are constructed on the same linear trinuclear Zn3（RCOO）6 secondary building units, have been synthesized and characterized by X-ray diffraction analyses. Structural analyses showed that there are terephthalic acids as ligand linkers to form the hxl topological layer structures for 1 and 2. The introduction of the rigid aromatic ring pyridine in 2 as the terminal co-ligand of Zn3-SBU to instead of the flexible ethanol in 1, will form the layer-pillared supramolecular systems with 2-D crisscross channels, through its π-π stacking interactions. Owing to the steric hindrance of amino groups, 3 was assembled into a three-dimensional porous structure with pcu topology derived from the 2-amino-terephthalic acid as linkers to connect the Zn3-SBUs through a head-to-tail type.展开更多
基金Supported by the Program for Talent Introduction in Guangdong Higher Education Institutions(No.201242)the Scientific Research Start-up Funds for Talent Introduction in Guangdong University of Petrochemical Technology(No.510018)
文摘A new coordination polymer, namely [Ca（HOABDC）], （1, H3OABDC = 5-oxyace- tateisophthalic acid）, has been synthesized through hydrothermal reactions of Ca（NO3）2 and H3OABDC. The title compound crystallizes in monoclinic, space group P21/c with a = 4.3043（2）, b = 21.4959（11）, c = 10.7450（6） A, β= 91.411（5）°, V= 993.88（9） A3, C10H6O7Ca, Mr = 278.23, Z = 4, Dc = 1.859 g/cm3, F（000） = 560,μ= 0.659 mm-1, the final R = 0.0328 and wR = 0.0670 for 1469 observed reflections （I 〉 2o（I））. Single-crystal X-ray structural analysis reveals that compound 1 features 1D Ca（II）-carboxylate chain-shaped subunits, which are further connected together via HOABDC2- ligands into a 3D （6,）-connected nia-type hybrid framework. Moreover, the luminescent property and thermal stability of 1 were also investigated
基金supported by the National Natural Science Foundation of China(No.11375082,11305086,11175080)Science Foundation of Hunan Province Department of Education(No.12A117)the Project Sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry(Wang X.F.)
文摘By the reaction of different aromatic dicarboxylic acid with zinc nitrate, three metal-carboxylate frameworks, [Zn3（BDC）3（EtOH）2]（1）, [Zn3（BDC）3（py）2]·2DMF（2）, and [Zn3（NH2-BDC）3（H2O）2]·5DMF（3） which are constructed on the same linear trinuclear Zn3（RCOO）6 secondary building units, have been synthesized and characterized by X-ray diffraction analyses. Structural analyses showed that there are terephthalic acids as ligand linkers to form the hxl topological layer structures for 1 and 2. The introduction of the rigid aromatic ring pyridine in 2 as the terminal co-ligand of Zn3-SBU to instead of the flexible ethanol in 1, will form the layer-pillared supramolecular systems with 2-D crisscross channels, through its π-π stacking interactions. Owing to the steric hindrance of amino groups, 3 was assembled into a three-dimensional porous structure with pcu topology derived from the 2-amino-terephthalic acid as linkers to connect the Zn3-SBUs through a head-to-tail type.
