A pillared-layer framework with high uptake and selective sorption of light hydrocarbons†
Abstract
A new pillared-layer metal–organic framework [Zn2(NH2-BTB)(2-nim)] (1) was successfully synthesized based on mixed ligands, where binuclear [Zn2(CO2)3]+ cluster-based cationic layers [Zn2(NH2-BTB)]+ (NH2-H3BTB = 1,3,5-(three-benzoic acid)aniline) are connected by 2-nitroimidazoles. Compound 1 shows high uptake and good adsorption selectivities for C3/C1 and C2/C1. Particularly, the C2H2 uptake capacity of 1 is up to 152 cm3 g−1 at 273 K and the selectivity for C3H8/CH4 is over 85 at room temperature.