Inorganic Chemistry, Vol.56, No.2, 705-708, 2017
Two Li-Zn Cluster-Based Metal-Organic Frameworks: Strong H-2/CO2 Binding and High Selectivity to CO2
Two metal-organic frameworks (MOFs) {(Me2NH2)[ZnLi(PTCA)(H2O)]}(n).n{3DMF.C4H8O2.4H(2)O} (1) and {(Me2NH2)[ZnLi(PTCA)]}(n).n{3DMF.5H(2)O} (2) have been constructed from Li-Zn clusters and pyrene-1,3,6,8-tetracarboxylic acid (H(4)PTCA) under solvothermal conditions. Gas sorption measurements have revealed that the pore of desolvated 2 (2d) can strongly interact with H-2 and CO2, with high H-2 and CO2 adsorption heats of 15.3 and 51.9 kJ/mol, respectively. Furthermore, 2d can selectively adsorb CO2 over N-2 and CH4, with high adsorption selectivity of CO2/N-2 and CO2/CH4.