Highly fluorescent Cucurbit[7]uril covalent organic frameworks for fluorescence sensor array.

Authors

Nurimangul Muntiza, Qun Wang, Yanan Liu, Jiayi Wang, Xuejia Chang, Meifang Xiao, Boyu Yuan, Qinran Li, Haijie Li, Yanjun Yu, Qiliang Deng

Published in

Analytica chimica acta. Volume 1424. Pages 346207. Nov 22, 2026. Epub Aug 31, 2026.

Abstract

Developing highly fluorescent COFs represents a challenging task due to their aggregation-caused quenching effect. In this research, highly fluorescent COFs were successfully constructed by introducing Q[7] as a macrocyclic framework unit into their backbone via a mechanical interlocking strategy. These Q[7]-based polycyclic COFs exhibited fluorescence quantum yields that were 10 times higher than those of their Q[7]-free counterparts, owing to the weakened interlayer aggregation and the cavity confinement effect of Q[7]. The recognition sites from Q[7] and also endowed these Q[7]-based polycyclic COFs with a prominent fluorescence response to various targets. These prominent properties enable COFs as a sensor array for highly sensitive identification and detection of 13 sulfonamide antibiotics (SAs) with detection limits down to the nanomolar range, with recovery rates of 90.3%-104.7% in real samples. The supramolecular isolation strategy and cavity confinement effect caused by Q[7] will drive increased interest in fabricating COFs using macrocyclic molecules.

PMID:
42887963
Bibliographic data and abstract were imported from PubMed on 17 Oct 2026.

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