Dynamic Zn-based metal-organic framework: stepwise adsorption, hysteretic desorption and selective carbon dioxide uptake

A new porous metal-organic framework based on paddle-wheel Zn-2 units and an unsymmetrical pyridyl dicarboxylate, contains a 3D intersecting pore system with uncommon stepwise adsorption and hysteretic desorption behavior for N-2, CO2 and H-2 gases at low temperature, and shows high selectivity for CO2 over N-2 at ambient temperature.