Fe(III)-Anchored Porphyrin-Based Nanoporous Covalent Organic Frameworks for Green Synthesis of Cyclic Carbonates from Olefins and CO2 under Atmospheric Pressure Conditions

Aone-pot conversion of readily available olefins and CO2, a greenhouse gas, into value-added cyclic carbonates (CCs)under mild atmospheric pressure conditions by using Fe(III)-centeredporphyrin-based covalent organic framework (P-COF) as an efficientheterogeneous catalyst is demonstrated. The utilization of carbon dioxide (CO2) asa C1 sourcecoupled with olefins, readily accessible feedstocks, offers dual advantagesof mitigating atmospheric carbon dioxide and green synthesis of valuablechemicals. In this regard, herein we demonstrate the application ofFe(III)-anchored porphyrin-based covalent organic framework (P-COF)as a promising recyclable catalyst for one-step generation of cycliccarbonates (CCs), value-added commodity chemicals from olefins andCO(2), under mild atmospheric pressure conditions. Moreover,this one-pot synthesis was applied to transform various olefins (aliphaticand aromatic) into the corresponding CCs in good yield and selectivity.In addition, the Fe(III)@P-COF showed good recyclability and durabilityfor multiple reuse cycles without losing its catalytic activity. Notably,this one-step synthesis strategy presents an eco-friendly, atom-economicalternative to the conventional two-step process requiring epoxides.This work represents a rare demonstration of porphyrin COF-catalyzedone-pot CC synthesis by utilizing readily available olefins at atmosphericpressure of carbon dioxide.