A new mfj-type metal-organic framework constructed from a methoxyl derived V-shaped ligand and its H2, CO2 and CH4 adsorption properties

Abstract

Based on a new V-shaped tetracarboxylic ligand with a methoxyl group, a new mfj-type microporous metal-organic framework [Cu6(MBDPB)3(H2O)6]·12DMF·10H2O (NJFU-3, NJFU for Nanjing Forestry University; H4MBDPB for 5-methoxyl-1,3-bis(3,5-dicarboxylphenyl)-benzene) was successfully synthesized and structurally characterized. With moderately high porosity, appropriate pore aperture and unsaturated metal sites, the activated NJFU-3a exhibits high H2 (2.56 wt% at 77 K and 1 bar) and CO2 uptakes (15.8 wt% at 298 K and 1 bar), and a moderately high CH4 storage capacity of 155 cm3 cm−3 at 35 bar and 298 K. Meanwhile, it shows a comparably high delivery amount of 135 cm3 cm−3 when taking 5 bar as a specific lower pressure limit and 65 bar as the upper limit.