Covalent Organic Frameworks for Carbon Dioxide Capture from Air.
J Am Chem Soc
; 144(28): 12989-12995, 2022 07 20.
Article
em En
| MEDLINE
| ID: mdl-35786881
ABSTRACT
We report the first covalent incorporation of reactive aliphatic amine species into covalent organic frameworks (COFs). This was achieved through the crystallization of an imine-linked COF, termed COF-609-Im, followed by conversion of its imine linkage to base-stable tetrahydroquinoline linkage through aza-Diels-Alder cycloaddition, and finally, the covalent incorporation of tris(3-aminopropyl)amine into the framework. The obtained COF-609 exhibits a 1360-fold increase in CO2 uptake capacity compared to the pristine framework and a further 29% enhancement in the presence of humidity. We confirmed the chemistry of framework conversion and corroborated the enhanced CO2 uptake phenomenon with and without humidity through isotope-labeled Fourier transform infrared spectroscopy and solid-state nuclear magnetic resonance spectroscopy. With this study, we established a new synthetic strategy to access a class of chemisorbents characterized by high affinity to CO2 in dilute sources, such as the air.
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Base de dados:
MEDLINE
Assunto principal:
Estruturas Metalorgânicas
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article