Effect of Coordinated Solvent Molecules on Metal Coordination Sphere and Solvent-Induced Transformations

• DOI: 10.1021/acs.cgd.6b01366
• Publication Date: 2016-12-28T17:36:35Z
• Authors: Wen-Qian Zhang; Wen-Yan Zhang; Rui-Dong Wang; Chun-Yan Ren; Quan-Quan Li; Yan-Ping Fan; Bin Liu; Ping Liu; Yao-Yu Wang
• Keywords: 01 natural sciences; 0104 chemical sciences

Four similar Mn(II) metal–organic frameworks (MOFs), {[Mn2(nbtc)(H2O)2(S)]·S·0.5H2O}n [S = DMF (1), DMA (2), NMP (3), DEF (4)] (DMF = N,N′-dimethylformamide, DMA = N,N′-dimethylacetamide, NMP = N-methyl-2-pyrrolidinone, DEF = N,N′-diethylformamide), have been assembled solvothermally from the nitro and carboxyl doubly functionalized ligand 6,6′-dinitro-2,2′,4,4′-biphenyl tetracarboxylic acid (H4nbtc) and characterized by single-crystal X-ray diffraction, elemental analyses, infrared spectroscopy, thermogravimetric analyses, and powder X-ray diffraction. All MOFs exhibit unique three-dimensional double-walled open-frameworks with one-dimensional parallelogram channels and have guest/coordinated water and carbonyl solvent molecules, reasonably providing a good example of the competitive behavior of water and carbonyl solvent molecules and an excellent candidate for studying the single crystal coordinated solvent exchange transformations. Interestingly, because of the different steric hindrance of the series...