Supramolecular porphyrin-based metal–organic frameworks: Cu(ii) naphthoate–Cu(ii) tetrapyridyl porphine structures exhibiting selective CO2/N2 separation

Abstract

1 and 2 were synthesized through the complexation of 5,10,15,20-tetra-4-pyridyl-21H,23H-porphine with copper(II) acetate and copper(II) 1-naphthoate and exhibited two-dimensional open and closed form structures, respectively. X-ray diffraction identified the supramolecular interactions leading to these packing motifs. N₂ and CO₂ sorption isotherms indicate that 2 allows the separation of these gases.