Conjugated microporous polymer networks with adjustable microstructures for high CO2 uptake capacity and selectivity

Abstract

A series of phenylene-based conjugated microporous polymers (CMPs) of the A₆ + M_x (x = 2, 3, 4, 6) type were synthesized. By tuning the monomer length and geometry, the BET surface area of CMPs can be tuned from 571 to 1115 m² g⁻¹. Amongst the synthesized CMPs, A₆CMP-1 exhibits the highest CO₂ adsorption capacity of 1218 mg g⁻¹ at 318 K and 60 bar pressure. In addition, A₆CMP-4 shows a high selectivity ratio of 47 for CO₂/N₂.