Picric Acid Removal from Water Using an Anion-Coordination-Based Supramolecular Organic Framework.

Authors

Huiqi Wei, Gen Liu, Yicheng Fang, Tianlong Huang, Yingcong Wu, Yajie Xu, Baoyu Yang, Xinyun Zhao, Zhengxi Huang, Hua Zhang, Lamei Wu, Jonathan L Sessler, Zhan Zhang

Published in

Journal of the American Chemical Society. Sep 08, 2025. Epub Sep 08, 2025.

Abstract

In contrast to metal ions that have been routinely used to construct metal-organic frameworks (MOFs), anions have rarely been used as essential coordination centers in supramolecular organic frameworks (SOFs). In this work, we present a SOF, chloride-SOF, based on the coordination of chloride anions and a flexible oligopyrrole. Owing to the multiple interactions between individual oligopyrrole molecules and an A-B-C-style stacking of the 2D honeycomb layers, crystalline chloride-SOF exhibits reasonable thermal stability and retains its structure upon desolvation. Treating contaminated water containing 100 mg L^-1 picric acid (PA) with the desolvated form of chloride-SOF reduced the PA concentration to the low ng L^-1 (ppt) level. Supporting studies provide evidence for the conclusion that the material captures PA through anion exchange and adaptive structural transformation, rather than pore-selectivity. Chloride-SOF thus showcases the potential of SOFs as structurally transformable materials useful for hazardous waste removal.

PMID:
40921039
Bibliographic data and abstract were imported from PubMed on 09 Sep 2025.

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