Architecturally tailored starpolymer catalysts for efficient CO2 cycloaddition at room temperature and atmospheric pressure

초록

Efficient utilization of CO2 as a sustainable carbon feedstock is crucial for controlling climate change and producing value-added chemicals. Herein, we report starpolymer catalysts incorporating a porphyrin core and quaternary ammonium halide groups for CO2 cycloaddition under ambient conditions. By tuning the density of nucleophilic units around the porphyrin core, we achieved enhanced catalytic activity and reduced activation energy compared to conventional catalysts. The inclusion of thermoresponsive P(DEGMA) segments enables simple catalyst recovery via temperature-induced precipitation, allowing for multiple recycling cycles while maintaining their catalytic activity. Substrate scope studies revealed that steric accessibility significantly influences catalytic performance. These findings demonstrate the potential of rationally designed starpolymer catalysts for sustainable CO2 conversion and demonstrate a versatile platform for polymer-based catalysis with tunable activity and recyclability. © 2026 The Authors

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