We report a synthetic strategy for constructing a novel flexible MOF from a rigid parent structure by ligand exchange. This is the first reported study on introducing flexible heterogeneity into a rigid structure via substantial structural rearrangement. The daughter material exhibits enhanced gas separation selectivity compared with the parent.
He, Y., Shang, J., Gu, Q., Li, G., Li, J., Singh, R. K., Xiao, P. Y., & Webley, P. A. (2015). Converting 3D rigid metal-organic frameworks (MOFs) to 2D flexible networks via ligand exchange for enhanced CO2/N2 and CH4/N2 separation. Chemical Communications, 51(79), 14716-14719. https://doi.org/10.1039/c5cc05867h