Highly selective sorption of CO2 and N2O and strong gas-framework interactions in a nickel(ii) organic material

Abstract

A new robust microporous Ni-MOF with cylindrical channels based on an interesting 4₁ helix structure was fabricated by the reaction of biphenyl-3,3′,5,5′-tetracarboxylic acid and nickel (II) acetate via a solvothermal method. Activated Ni-MOF exhibits excellent CO₂ and N₂O sorption capabilities as well as high separations of CO₂ and N₂O over N₂/O₂/CH₄/H₂/Ar/He at 273 K, 298 K and 313 K. Moreover, the framework shows high isosteric heats of adsorption of three main greenhouse gases (CO₂, CH₄ and N₂O).