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ISSN: 2333-9721
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-  2019 

Catalyst-Free Click Polymerization of CO2 and Lewis Monomers for Recyclable C1 Fixation and Release

DOI: https://doi.org/10.1021/acsmacrolett.9b00066

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Abstract:

Conversion of carbon dioxide (CO2) into valuable chemicals in gentle conditions is a great challenge in sustainable and energy chemistry. Here we report a CO2-participated polymerization using frustrated Lewis pair (FLP) as the monomer, which allows us to obtain well-defined CO2/FLP alternating copolymers with high molecular weights (~50000) and quantitative conversions (~95%), resembling a “click” polymerization of CO2 gas and FLP molecules. In comparison to other CO2-based polymerizations, this method features spontaneity, catalyst-free, and speediness, as well as can realize in ambient temperature (20 °C) and low CO2 pressure conditions (1.0 atm). Moreover, owing to the dynamic covalent bonding between CO2 and FLP unit, such a class of alternating copolymers upon heating can depolymerize into initial monomers and release CO2, which could make them as recyclable smart materials for reversible C1 fixation and release

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