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

doi:10.1016/j.aca.2022.340262

Cited by 11 publications

(1 citation statement)

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“…30,31) With this in mind, we note the widespread use of fluorescence sensing for the detection of various substances, where the attraction is the simplicity, operability, and sensitivity of the method. [32][33][34][35][36][37][38][39][40][41][42][43][44] Examples include Li et al, who have utilized a fluorescent probe constructed using Q [7] and PAL in order to detect ethambutol. 45) Also, Yang et al reported a fluorescent probe constructed using Q [7] and PAL for the detection of L-cystine.…”

Section: Introductionmentioning

confidence: 99%

Selective detection of paraquat by a cucurbit[7]uril-based fluorescent probe

Shan,

Pan,

et al. 2024

J. Pestic. Sci.

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A simple fluorescent "on-off" system that can be utilized for the selective identification and determination of paraquat (PQ) is presented herein. 1 H NMR spectroscopic data indicated that in aqueous solution the alkaloid palmatine can be partially encapsulated within the cucurbit[7]uril (Q[7]) cavity, whereby a stable 1 : 1 host-guest inclusion complex is formed. Other characterization techniques including mass spectrometry, UV-Vis and fluorescence spectroscopy also provided further evidence, and the host-guest inclusion complex was found to exhibit reasonable fluorescence intensity. It is noteworthy that the addition of PQ resulted in quenching the fluorescence of the host-guest inclusion complex, whereas the presence of 12 other pesticides did not significantly affect the fluorescence intensity. Given the linear relationship between the intensity of the fluorescence and the PQ concentration, the PQ concentration in aqueous solution was easily detected. Thus, a new method for identifying and determining the fluorescence quenching of PQ has been developed in this work.

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