Twistedly hydrophobic basis with suitable aromatic metrics in covalent organic networks govern micropollutant decontamination

Chencheng Qin, Yi Yang, Xiaodong Wu, Long Chen, Zhaoli Liu, Lin Tang, Lai Lyu, Danlian Huang, Dongbo Wang, Chang Zhang, Xingzhong Yuan, Wen Liu () and Hou Wang ()
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Chencheng Qin: Hunan University
Yi Yang: Hunan University
Xiaodong Wu: Nanjing Tech University
Long Chen: Peking University
Zhaoli Liu: Peking University
Lin Tang: Hunan University
Lai Lyu: Guangzhou University
Danlian Huang: Hunan University
Dongbo Wang: Hunan University
Chang Zhang: Hunan University
Xingzhong Yuan: Hunan University
Wen Liu: Peking University
Hou Wang: Hunan University

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract The pre-designable structure and unique architectures of covalent organic frameworks (COFs) render them attractive as active and porous medium for water crisis. However, the effect of functional basis with different metrics on the regulation of interfacial behavior in advanced oxidation decontamination remains a significant challenge. In this study, we pre-design and fabricate different molecular interfaces by creating ordered π skeletons, incorporating different pore sizes, and engineering hydrophilic or hydrophobic channels. These synergically break through the adsorption energy barrier and promote inner-surface renewal, achieving a high removal rate for typical antibiotic contaminants (like levofloxacin) by BTT-DATP-COF, compared with BTT-DADP-COF and BTT-DAB-COF. The experimental and theoretical calculations reveal that such functional basis engineering enable the hole-driven levofloxacin oxidation at the interface of BTT fragments to occur, accompanying with electron-mediated oxygen reduction on terphenyl motif to active radicals, endowing it facilitate the balanced extraction of holes and electrons.

Date: 2023
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DOI: 10.1038/s41467-023-42513-x

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