Zwitterion π–conjugated nanoporous polymer based on guanidinium and β-ketoenol as a heterogeneous organo-catalyst for chemical fixation of CO2 into cyclic carbonates

  1. Mousumi Garai ORCID Logo,
  2. Vepa RozyyevORCID Logo and
  3. Cafer T Yavuz ORCID Logo

Submitting author affiliation: Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea, Republic of

Beilstein Arch. 2019, 201951. doi:10.3762/bxiv.2019.51.v1

Published 28 Jun 2019

  • Preprint


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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Garai, M.; Rozyyev, V.; Yavuz, C. T. Beilstein Arch. 2019, 201951. doi:10.3762/bxiv.2019.51.v1

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