Tailoring open metal sites for selective capture of CO2 in isostructural metalloporphyrin porous organic networks

Abstract

Porphyrin-based isostructural porous organic networks have been synthesized by varying the central metal atoms to cobalt, nickel and copper. Their selectivities for CO₂ capture over N₂ and Ar are found to be enhanced as the heats of adsorption for CO₂ are increased in the order of Co, Ni and Cu, while the pore structures are well maintained.