Two New Complexes with the Same（3,8）-Connected tfz-d Topology Based on [Co₄（μ₃-OH）₂] Clusters and Different Aromatic Multicarboxylic Acids

【摘要】 Two new metal-organic frameworks（MOFs）, namely, [Co₂（L₁）（bix）（μ₃-OH）]·2H₂O（1） and [Co₂（L₂）（bix）（μ₃-OH）]·2.5H₂O（2）（H₃L₁ = 5-oxyacetate isophthalic acid, H₃L₂ = 3,5-bis-oxyacetate-benzoic acid, bix = 1,4-bis（imidazol-1-ylmethyl）benzene）, have been synthesized under hydrothermal conditions. Their structures were determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, IR spectra, and powder X-ray diffraction（PXRD） analysis. Both complexes 1 and 2 demonstrate identical three-dimensional（3D）（3,8）-connected tfz-d nets with（4³）₂(4⁶·6¹⁸·8⁴) topologies, where the tetranuclear [Co₄（μ₃-OH）₂] clusters act as 8-connected nodes and aromatic multicarboxylic ligands as 3-connected nodes. The results show that the ligands with different geometrical conformations can form products with the same topological structures. Their thermal and magnetic properties were also investigated.更多还原

【Abstract】 Two new metal-organic frameworks（MOFs）, namely, [Co₂（L₁）（bix）（μ₃-OH）]·2H₂O（1） and [Co₂（L₂）（bix）（μ₃-OH）]·2.5H₂O（2）（H₃L₁ = 5-oxyacetate isophthalic acid, H₃L₂ = 3,5-bis-oxyacetate-benzoic acid, bix = 1,4-bis（imidazol-1-ylmethyl）benzene）, have been synthesized under hydrothermal conditions. Their structures were determined by single-crystal X-ray diffraction analysis and further characterized by elemental analysis, IR spectra, and powder X-ray diffraction（PXRD） analysis. Both complexes 1 and 2 demonstrate identical three-dimensional（3D）（3,8）-connected tfz-d nets with（4³）₂(4⁶·6¹⁸·8⁴) topologies, where the tetranuclear [Co₄（μ₃-OH）₂] clusters act as 8-connected nodes and aromatic multicarboxylic ligands as 3-connected nodes. The results show that the ligands with different geometrical conformations can form products with the same topological structures. Their thermal and magnetic properties were also investigated.更多还原