Journal
ACS APPLIED POLYMER MATERIALS
Volume 3, Issue 5, Pages 2588-2597Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsapm.1c00202
Keywords
porous organic polymer; copolymerization; heterogeneous catalysis; cascade reactions; carbon dioxide fixation; cyclic carbonate
Funding
- Max Planck Society
- Alexander Von Humboldt stiftung
- Erasmus program
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Through copolymerization of acetic anhydride and L-histidine, a nitrogen-doped nanoporous polymer can be synthesized to serve as an acid-base heterogeneous catalyst, with potential for optimizing the synthesis process. Furthermore, the catalyst is capable of catalyzing CO2 cycloaddition without the need for cocatalysts.
Acetic anhydride (AA) is usually considered a stable molecule but is shown here to be able to polymerize in closed reactors to a cross-linked polyketone condensate. By using this chemistry, it was possible to copolymerize AA with L-histidine, which gives a nitrogen-doped functional nanoporous polymer that can act as an acid-base heterogeneous catalyst. The polymer acidic and basic sites were screened by running an acetal hydrolysis Knoevenagel condensation reaction cascade to optimize catalyst synthesis. Furthermore, it was possible to catalyze CO2 cycloaddition to epoxides to the corresponding cyclic carbonate with complete conversion without cocatalysts.
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