Mechanochemical vs Wet Approach for Directing CO 2 Capture toward Various Carbonate and Bicarbonate Networks

• Published in: ACS sustainable chemistry & engineering Vol. 10; no. 14; pp. 4374 - 4380
• Main Authors: Leszczyński, Michał K, Kornacki, Dawid, Terlecki, Michał, Justyniak, Iwona, Miletić, Goran I, Halasz, Ivan, Bernatowicz, Piotr, Szejko, Vadim, Lewiński, Janusz
• Format: Journal Article
• Language: English
• Published: United States 11.04.2022
• ISSN: 2168-0485; 2168-0485
• DOI: 10.1021/acssuschemeng.1c08402

The distinct research areas related to CO capture and mechanochemistry are both highly attractive in the context of green chemistry. However, merger of these two areas, , mechanochemical CO capture, is still in an early stage of development. Here, the application of biguanidine as an active species for CO capture is investigated using both solution-based and liquid-assisted mechanochemical approaches, which lead to a variety of biguanidinium carbonate and bicarbonate hydrogen-bonded networks. We demonstrate that in solution, the formation of the carbonate vs bicarbonate networks can be directed by the organic solvent, while, remarkably, in the liquid-assisted mechanochemical synthesis employing the same solvents as additives, the selectivity in network formation is inversed. In general, our findings support the view of mechanochemistry not only as a sustainable alternative but rather as a complementary strategy to solution-based synthesis.