Six Three-Dimensional Metal−Organic Frameworks with (3,4)-, (4,5)-, and (3,4,5)-Connected Nets Based on Mixed Ligands: Synthesis, Structures, and Adsorption Properties
Ming, X; Guangshan, Z; Hong, D; Lei, W; Xiaojun, Z; Zhao, J; Shilun, Q
Six new 3D metal−organic frameworks (MOFs) Cd2(3,4-PDC)2(μ2-hmt)(H2O)2·(DMF)2(H2O)2(JUC-65), Zn4(3,4-PDC)4(μ2-hmt)(H2O)6·(DMA)4(H2O)5(JUC-66), Cd2(3,4-PDC)2(bipy)2(H2O)2·(DMA)3(H2O)4(JUC-67), Cd2(3,4-PDC)2(bipy)(DMF)(H2O)·(H2O)2(JUC-68), Mn2(3,4-PDC)2(μ2-hmt)(H2O)2(JUC-69), and Zn8(3,4-PDC)8(bipy)3(DMA)2·(DMA)8(H2O)8(JUC-70) (3,4-H2PDC = pyridine-3,4-dicarboxylic acid, hmt = hexamethylenetramine, bipy = 4,4′-bipyridine, DMF = N,N′-dimethylformamide, DMA = N,N′-dimethylacetamide, and JUC = Jilin University China) have been synthesized via heterocoordination of unsymmetrical 3,4-H2PDC and transition metal ions (Cd2, Zn2, or Mn2) to construct corrugated layers pillared by hmt or bipy ligands, which form various sizes and shapes of channels. Remarkably, from the topological point of view, JUC-65−68 exhibit three undocumented types of (3,4)-connected networks, JUC-69 exhibits a rare (4,5)-connected network, and JUC-70 possesses an unprecedented (3,4,5)-connected network. In addition, methanol adsorption isotherms of the activated JUC-65 and JUC-67 reveal type I behavior with approximately 87.7 mg/g and 124.8 mg/g at room temperature, respectively. [ABSTRACT FROM AUTHOR] Copyright of Crystal Growth & Design is the property of American Chemical Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts)