A (3,8)-connected metal–organic framework with a unique binuclear [Ni2(μ2-OH)(COO)2] node for high H2 and CO2 adsorption capacities†
Abstract
A rare binuclear [Ni2(μ2-OH)(COO)2]-based nickel–organic framework (1) composed of close-packed irregular octahedral cages possesses a new (3,8)-connected topology with the Schläfli symbol of (3·52)2(34·42·56·611·74·8). At 1.0 bar, this activated sample (1a) exhibits a considerably high H2 uptake of 203.2 cm3 g−1 (1.81 wt%) at 77 K, and a high CO2 uptake of 108.2 cm3 g−1 (21.3 wt%) at 273 K. In addition, 1a has good adsorption selectivity for CO2 over CH4 and N2.