Synthesis of functional conjugated microporous polymers containing pyridine units with high BET surface area for reversible CO2 storage

Novel and functional conjugated microporous polymers (PCMPs) with pyridine units in networks were synthesized from arylethynylenes and 2,6-bis(bromomethyl) pyridine by palladium-catalyzed Sonogashira-Hagihara crosscoupling chemistry. The resulting PCMPs exhibit good chemical and thermal stability with decomposition temperature above 400 °C. The choice of ethynyl monomer has an obvious influence on the specific surface areas of the resulting CMPs. A high BET surface area of 1136 m2 g− 1 was achieved. Taking advantages of the good physicochemical stability and excellent porosity, the functional CMPs networks show superior adsorption performance for CO2 with uptake up to 109.0 mg g− 1. Given the excellent porosity and gas uptake as well as good physiochemical stability, the as-synthesized PCMPs show great potentials in CO2 uptake. Our study may provide fundamental guidance in designing new CMPs-based materials for the application in CO2 capture and storage.