Charged Metalloporphyrin Polymers for Cooperative Synthesis of Cyclic Carbonates from CO2 under Ambient Conditions. Issue 11 (17th May 2017) - Chen, Yaju
Abstract: A facile and one‐pot synthesis of metalloporphyrin‐based ionic porous organic polymers (M‐iPOPs) was performed through a typical Yamamoto–Ullmann coupling reaction for the first time. We used various characterization techniques to demonstrate that these strongly polar Al‐based materials (Al‐iPOP) possessed a relatively uniform microporosity, good swellable features, and a good CO2 capture capacity. If we consider the particular physicochemical properties, heterogeneous Al‐iPOP, which bears both a metal active center and halogen anion, acted as a bifunctional catalyst for the solvent‐ and additive‐free synthesis of cyclic carbonates from various epoxides and CO2 with an excellent activity and good recyclability under mild conditions. Interestingly, these CO2 ‐philic materials could catalyze the cycloaddition reaction smoothly by using simulated flue gas (15 % CO2 in N2, v / v ) as a raw material, which indicates that a stable local microenvironment and polymer swellability might promote the transformation. Thus, the introduction of polar ionic liquid units into metalloporphyrin‐based porous materials is regarded as a promising new strategy for the chemical conversion of CO2 . Abstract : POP goes the catalyst ! Bifunctional metalloporphyrin‐based ionic porous organic polymers can efficiently and repeatedly catalyze the cycloaddition reaction of CO2 and epoxides to afford cyclic carbonates under solvent‐/additive‐free and mild conditions.