Facile fluorescent detection of o-nitrophenol by a cucurbit[8]uril-based supramolecular assembly in aqueous media

He, Jiao; Yu, Xiang Yun; Yu, Zhi Chao; Liu, Ming; Shan, Pei Hui; Redshaw, Carl; Huang, Ying; Tao, Zhu; Xiao, Xin

Abstract

The efficient and selective detection of isomers is an attractive but challenging area. In this study, a supramolecular fluorescent probe based on cucurbit[8]uril (Q[8]) and a pyrene-based derivative (G) was prepared, which effectively recognized and removed o-nitrophenol (o-NP) from a mixture of nitrophenol isomers. The newly designed probe G@Q[8] was characterized by NMR spectroscopy, fluorescence emission and UV–Vis spectroscopy, and its host-guest properties in aqueous solution were investigated. The results revealed that the system forms a stable inclusion complex with a stoichiometric ratio of 1:1, which was accompanied by a distinct fluorescence enhancement of G. Moreover, it was employed for the rapid detection of nitrophenol isomers where o-NP showed a dramatical quenching efficiency with a detection limit of 1.53 × 10−7 mol·L-1. This highly efficient supramolecular fluorescent probe offers a new strategy for the convenient detection and removal of o-NP from mixtures in aqueous medium.

Citation

He, J., Yu, X. Y., Yu, Z. C., Liu, M., Shan, P. H., Redshaw, C., Huang, Y., Tao, Z., & Xiao, X. (2022). Facile fluorescent detection of o-nitrophenol by a cucurbit[8]uril-based supramolecular assembly in aqueous media. Analytica Chimica Acta, 1226, Article 340262. https://doi.org/10.1016/j.aca.2022.340262

• Journal Article Type: Article
• Acceptance Date: Aug 12, 2022
• Online Publication Date: Aug 19, 2022
• Publication Date: Sep 15, 2022
• Deposit Date: Sep 6, 2022
• Publicly Available Date: Aug 20, 2023
• Journal: Analytica Chimica Acta
• Print ISSN: 0003-2670
• Electronic ISSN: 1873-4324
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 1226
• Article Number: 340262
• DOI: https://doi.org/10.1016/j.aca.2022.340262
• Keywords: Cucurbit[n]urils; Pyrene; Host-guest interaction; Fluorescent probe; Nitrophenol isomers
• Public URL: https://hull-repository.worktribe.com/output/4067651