Ying Liang, Jiawen Yang, Wang Chen, Peibo Chen, Ping Fang, Ying-Ming Pan
Silver metalized organic porous polymer (Ag@POP-HCO3) was prepared by copolymerizing the HCO3- modified N -heterocyclic carbene monomer loading silver with divinylbenzene. The in-situ conversion of low concentration CO2 from coal-fired flue gas or air into oxazolidinone compounds was achieved through carboxylation cyclization reaction catalyzed by Ag@POP-HCO3 under ambient conditions, without the addition of any cocatalyst. Additionally, both SO2 and NO2 did not interfere with the reaction at normal concentration presented in flue gas. The Ag@POP-HCO3 can effectively catalyze the gram reaction, and its catalytic activity is not significantly reduced after being recycled. The introduction of HCO3- increased the specific surface area and microporous volumes of the catalyst, enhancing its ability to adsorb CO2. Furthermore, N -heterocyclic carbene and HCO3- collaborated to expedite the activation of CO2, while the coordination of silver serves to activate the substrate. The proposed approach avoids cost issues of traditional carbon capture, utilization and storage technology and promotes green chemical process development.