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Effective carbon dioxide (CO 2 ) capture requires solid, porous sorbents with chemically and thermally stable frameworks. Herein, we report two new carbon-carbon bonded porous networks that were synthesized through metal-free Knoevenagel nitrile-aldol condensation, namely the covalent organic polymer, COP-156 and 157. COP-156, due to high specific surface area (650 m 2 /g) and easily interchangeable nitrile groups, was modified post-synthetically into free amine- or amidoxime-containing networks. The modified COP-156-amine showed fast and increased CO 2 uptake under simulated moist flue gas conditions compared to the starting network and usual industrial CO 2 solvents, reaching up to 7.8 wt % uptake at 40 °C.

Robust C–C bonded porous networks with chemically designed functionalities for improved CO2 capture from flue gas

Robust C–C bonded porous networks with chemically designed functionalities for improved CO₂ capture from flue gas