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A host-guest complexation based fluorescent probe for the detection of paraquat and diquat herbicides in aqueous solutions
Song G.-X.1; Tang Q.1; Huang Y.1; Wang R.3; Xi Y.-Y.1; Ni X.-L.1; Tao Z.1; Xue S.-F.1; Zhang J.-X.2
2015
Source PublicationRSC Advances
ISSN20462069
Volume5Issue:121Pages:100316-100321
AbstractThe supramolecular interactions among thioflavin T (ThT), two herbicides paraquat (PQ) and diquat (DQ), and macrocyclic cucurbit[8]uril (Q[8]), were studied using spectrofluorimetry, ultraviolet-visible absorbance spectrometry, H nuclear magnetic resonance spectroscopy, and isothermal titration calorimetry. A new method based on fluorescence quenching of the fluorescent host-guest complexes of Q[8]-ThT (the probe) upon cooperative binding with PQ or DQ to form a ternary complex, was proposed for the analytical determination of the two herbicides in aqueous solutions. Detection limits of 7.95 × 10 mol L and 8.07 × 10 mol L were obtained for PQ and DQ, respectively. Recoveries obtained by the proposed method in real-world examples such as river water and cabbage extracts were 104-108%. Interestingly, this method demonstrated high selectivity towards PQ and DQ in the presence of various metal ions and quaternary ammonium substances. Such a method provides a rapid, selective, sensitive and facile strategy for herbicides detection and quantification.
DOI10.1039/c5ra18335a
URLView the original
Language英語
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Cited Times [WOS]:2   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Guizhou University
2.Key Laboratory of Chemistry for Natural Products of Guizhou Province
3.University of Macau
Recommended Citation
GB/T 7714
Song G.-X.,Tang Q.,Huang Y.,et al. A host-guest complexation based fluorescent probe for the detection of paraquat and diquat herbicides in aqueous solutions[J]. RSC Advances,2015,5(121):100316-100321.
APA Song G.-X..,Tang Q..,Huang Y..,Wang R..,Xi Y.-Y..,...&Zhang J.-X..(2015).A host-guest complexation based fluorescent probe for the detection of paraquat and diquat herbicides in aqueous solutions.RSC Advances,5(121),100316-100321.
MLA Song G.-X.,et al."A host-guest complexation based fluorescent probe for the detection of paraquat and diquat herbicides in aqueous solutions".RSC Advances 5.121(2015):100316-100321.
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