Different two-dimensional metal-organic frameworks through ligand modification

作者：Zhang, Jian; Wang, Bin; Li, Ming; Zhao, Min-Jian; Xie, Ya-Bo^*; Li, Jian-Rong

来源：Journal of Coordination Chemistry, 2016, 69(14): 2193-2199.

DOI：10.1080/00958972.2016.1196291

• Metal-organic frameworks
• ligand modification
• crystal structure
• topology

Through ligand modification, we have replaced the central benzene ring of H2TDBA ([1,1': 3', 1.-terphenyl]-4,4.-dicarboxylicacid) with the pyridine structurally related ligand H2PDDA (4,4'-(pyridine-2,6-diyl) dibenzoic acid), which makes the central pyridine ring of H2PDDA more coplanar with two benzene rings on both sides of the ligand. The modification results in a dramatically different linkage configuration, thereby allowing structural changes to the metal-organic frameworks (MOFs). Two 2-D MOFs, [Cu(TDBA)(DMA)2].H2O (BUT-221, DMA = N,N-dimethylacetamide), and [Cu 3 (PDDA) 3 (DMA) 2 (H2O)].5H2O (BUT-223) have been synthesized through reactions of two ditopic carboxylate ligands with Cu(NO3)2.3H2O under solvothermal conditions, and characterized by single-crystal X-ray diffraction, powder X-ray diffraction, thermogravimetric analysis and infrared spectroscopy. Topological analysis shows that BUT-221 is a twofold parallel interpenetrating 44 2-D network with a skl topology, while BUT-223 is a 2-D network with a kgm topology.

• 出版日期2016
• 单位北京工业大学; 青岛科技大学