Facile synthesis of porous porphyrin-based polymers by solvent-crosslinking method

Abstract

Excessive emissions of carbon dioxide have caused serious harm to the natural environment. Porphyrin-based microporous organic polymers play an important role in carbon capture and separation. In this study, several porphyrin-based polymers were synthesized through Friedel–Crafts alkylation. Although they have similar structures, the pore sizes and BET surface area of porous tetraphenyl porphyrins (POTPPs) are different on account of the solvent (crosslinker) adopted. The POTPPs exhibit surface areas of up to 940 m² g⁻¹. Owing to the larger surface area and N-contained structure, these POTPPs show high CO₂ adsorption ability (3.25 mmol g⁻¹) and good CO₂/CH₄ separation abilities (6.04) at 273 K/1.0 bar. Therefore, these materials appear to be candidates for CO₂ adsorption and separation.