The chemical fixation of CO2 with epoxides to cyclic carbonate is an attractive 100% atom economic reaction. It is a safe and green alternative to the route from diols and toxic phosgene. In this manuscript, we present a new zwitterionic π–conjugated nanoporous catalyst (Covalent Organic Polymer, COP-213) based on guanidinium and β-ketoenol functionality, that is synthesized from triaminoguanidinium halide (TGCl) and β-ketoenols via ampoule method at 120°C. The catalyst is characterized by NMR, FTIR-ATR, PXRD, TGA, and for surface area (BET) and CO2 uptake. It shows quantitative conversion and selectivity in chemical fixation of CO2 to epoxides under ambient conditions and without the need for co-catalysts, metals, solvent, or pressure. The catalyst can be recycled at least three times without loss of reactivity.
Keywords: carbon dioxide; cyclic carbonate; catalysis; chemical fixation; guanidinium; β-ketoenol; nanoporous
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When a peer-reviewed version of this preprint is available in the Beilstein Journals, this information will be updated in the information box above. If no peer-reviewed version is available, please cite this preprint using the following information:
Garai, M.; Rozyyev, V.; Yavuz, C. T. Beilstein Arch. 2019, 201951. doi:10.3762/bxiv.2019.51.v1
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