An ionic vinylene-linked three-dimensional covalent organic framework for selective and efficient trapping of ReO<sub>4</sub><sup>-</sup> or <sup>99</sup>TcO<sub>4</sub><sup></sup>.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 36494388.
- Also identified by DOI 10.1038/s41467-022-35435-7 and PMC identifier 9734744.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
The synthesis of ionic olefin linked three-dimensional covalent organic frameworks (3D COFs) is greatly challenging given the hardness of the formation of stable carbon-carbon double bonds (-C = C-). Herein, we report a general strategy for designing porous positively charged sp<sup>2</sup> carbon-linked 3D COFs through the Aldol condensation promoted by quaternization. The obtained 3D COFs, namely TFPM-PZI and TAPM-PZI, showed impressive chemical stability. Furthermore, the positively charged frameworks with regular porosity endow 3D ionic COFs with selective capture radioactive ReO<sub>4</sub><sup>-</sup>/TcO<sub>4</sub><sup>-</sup> and great removal efficiency in simulated Hanford waste. This research not only broadens the category of 3D COFs but also promotes the application of COFs as efficient functional materials.
Medical subject headings
- Metal-Organic Frameworks