论文部分内容阅读
Two new metal-organic frameworks(MOFs), namely, [Co_2(L_1)(bix)(μ_3-OH)]·2H_2O(1) and [Co_2(L_2)(bix)(μ_3-OH)]·2.5H_2O(2)(H_3L_1 = 5-oxyacetate isophthalic acid, H_3L_2 = 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(4~3)_2(4~6·6~(18)·8~4) topologies, where the tetranuclear [Co_4(μ_3-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.
Two new metal-organic frameworks (MOFs), namely, [Co_2 (L_1) (bix) (μ_3-OH)] · 2H_2O and [Co_2 (L_2) (bix) 2) (H_3L_1 = 5-oxyacetate isophthalic acid, H_3L_2 = 3,5-bis-oxyacetate-benzoic acid, bix = 1, 4- bis (imidazol- 1-ylmethyl) benzene), have been synthesized under hydrothermal conditions. Both determined 1 and 2 demonstrate identical three-dimensional (3D) (3, 8) topologies, where the tetranuclear [Co_4 (μ_3-OH) _2] clusters act as 8-connected nodes and (4~6) ~ 8 ~ 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.