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A cucurbit[8]uril-based fluorescent probe for the selective detection of pymetrozine

Shan, Pei Hui; Pan, Ding Wu; Chen, Li Xia; Prior, Timothy J.; Redshaw, Carl; Tao, Zhu; Xiao, Xin

Authors

Pei Hui Shan

Ding Wu Pan

Li Xia Chen

Profile image of Tim Prior

Dr Tim Prior T.Prior@hull.ac.uk
Senior Lecturer in Inorganic Chemistry

Carl Redshaw

Zhu Tao

Xin Xiao



Abstract

Herein, we report a simple fluorescence-enhanced system for the selective recognition and determination of the insecticide pymetrozine. 1H NMR spectroscopic data indicate that 1,2-bis(4-pyridyl)ethylene (BPE) is partially encapsulated in the cavity of the cucurbit[8]uril (Q[8]) in aqueous solution, forming a stable 1:2 host-guest inclusion complex. Good evidence is also provided by other characterization techniques including single crystal X-ray diffraction, UV–Vis and fluorescence spectroscopies. This host-guest inclusion complex shows weak fluorescence in aqueous solution. Interestingly, the addition of pymetrozine greatly enhanced the fluorescence of the host-guest inclusion complex. In contrast, no significant fluorescence enhancement was observed on addition of 10 other pesticides. The concentration of pymetrozine in aqueous solution was easily detected based on the linear relationship between fluorescence intensity and pymetrozine concentration. Therefore, this paper reports a new method to identify and determine pymetrozine by fluorescence enhancement.

Citation

Shan, P. H., Pan, D. W., Chen, L. X., Prior, T. J., Redshaw, C., Tao, Z., & Xiao, X. (2023). A cucurbit[8]uril-based fluorescent probe for the selective detection of pymetrozine. Journal of molecular structure, 1294(2), Article 136418. https://doi.org/10.1016/j.molstruc.2023.136418

Journal Article Type Article
Acceptance Date Aug 12, 2023
Online Publication Date Aug 14, 2023
Publication Date Dec 15, 2023
Deposit Date Aug 17, 2023
Publicly Available Date Aug 21, 2023
Journal Journal of Molecular Structure
Print ISSN 0022-2860
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 1294
Issue 2
Article Number 136418
DOI https://doi.org/10.1016/j.molstruc.2023.136418
Keywords Cucurbit[n]uril; Supramolecular assembly; Selective recognition; Fluorescent probe; Host−guest chemistry
Public URL https://hull-repository.worktribe.com/output/4361976
Additional Information This article is maintained by: Elsevier; Article Title: A cucurbit[8]uril-based fluorescent probe for the selective detection of pymetrozine; Journal Title: Journal of Molecular Structure; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.molstruc.2023.136418; Content Type: article; Copyright: © 2023 The Author(s). Published by Elsevier B.V.

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