Mixed-linker approach in designing porous zirconium-based metal–organic frameworks with high hydrogen storage capacity

Abstract

New zirconium based metal–organic framework (UBMOF-31) synthesised using mixed-linker strategy showing permanent porosity, excellent hydrogen uptake, and high selectivity for adsorption of CO ₂ over N ₂.

Abstract

Three highly porous Zr( iv)-based metal–organic frameworks, UBMOF-8, UBMOF-9, and UBMOF-31, were synthesized by using 2,2′-diamino-4,4′-stilbenedicarboxylic acid, 4,4′-stilbenedicarboxylic acid, and combination of both linkers, respectively. The mixed-linker UBMOF-31 showed excellent hydrogen uptake of 4.9 wt% and high selectivity for adsorption of CO ₂ over N ₂ with high thermal stability and moderate water stability with permanent porosity and surface area of 2552 m ² g ⁻¹.