HCO₃^- modified N-heterocyclic carbene silver organic porous polymer catalyzes the conversion of low concentration CO₂ into oxazolidinone compounds

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.