One-Pot Multiple-Step Integration Strategy for Efficient Fixation of CO2 into Chain Carbonates by Azolide Anions Poly(ionic liquid)s

The multiple-step transformation of CO2 greatly enriches the diversity and value of products and provides more possibilities for the sustainable development of green chemistry. However, it puts forward stricter requirements for the versatility of catalysts. A series of basic porous ionic polymers incorporating azolide anions (BA-PILs) were facilely synthesized via radical polymerization followed by a successive ion-exchange strategy. A one-pot multiple-step integration strategy coupling cycloaddition and transesterification were explored to synthesize chain carbonates without the separation of intermediate products. High catalytic activity, stable recyclability, and chain carbonate compatibility were achieved in the absence of any cocatalyst. Combined with catalysts' characterization, in situ IR analysis, and density functional theory (DFT) calculation of BA-PILs rationally explained the dual roles of azolide anions in the one-pot synthesis. The construction of functional BA-PILs as a versatile platform provides an original idea for the efficient insertion of CO2 into chain carbonates.