Synthesis of propenone-linked covalent organic frameworks via Claisen-Schmidt reaction for photocatalytic removal of uranium

Cheng-Peng Niu, Cheng-Rong Zhang, Xin Liu, Ru-Ping Liang () and Jian-Ding Qiu ()
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Cheng-Peng Niu: Nanchang University
Cheng-Rong Zhang: Nanchang University
Xin Liu: Nanchang University
Ru-Ping Liang: Nanchang University
Jian-Ding Qiu: Nanchang University

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract The type of reactions and the availability of monomers for the synthesis of sp2-c linked covalent organic frameworks (COFs) are considerably limited by the irreversibility of the C=C bond. Herein, inspired by the Claisen-Schmidt condensation reaction, two propenone-linked (C=C–C=O) COFs (named Py-DAB and PyN-DAB) are developed based on the base-catalyzed nucleophilic addition reaction of ketone-activated α-H with aromatic aldehydes. The introduction of propenone structure endows COFs with high crystallinity, excellent physicochemical stability, and intriguing optoelectronic properties. Benefitting from the rational design on the COFs skeleton, Py-DAB and PyN-DAB are applied to the extraction of radionuclide uranium. In particular, PyN-DAB shows excellent removal rates (>98%) in four uranium mine wastewater samples. We highlight that such a general strategy can provide a valuable avenue toward various functional porous crystalline materials.

Date: 2023
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DOI: 10.1038/s41467-023-40169-1

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