A sensitive and selective fluorescent sensor for flumioxazin was designed based on the formation of
strong fluorescence compound (1,2,3-triazole compounds) via the reaction of the alkynyl group in
flumioxazin with 3-azido-7-hydroxycoumarin, a weak-fluorescent compound, through the Cu+-catalysed
azide–alkyne cycloaddition (CuAAC) reaction. The fluorescence increase factor (represented by F/F0) of
the system exhibited a good linear relationship with the concentrations of flumioxazin in the range of
0.25–6.0 lg/L with a detection limit of 0.18 lg/L (S/N = 3). Also, the proposed fluorescent sensor
demonstrated good selectivity for flumioxazin assay even in the presence of high concentration of other
pesticides. Based on such high sensitivity and selectivity, the proposed fluorescent sensor has been
applied to test the flumioxazin residue in some vegetable and water samples with satisfied results.
2014 Elsevier Ltd. All rights reserved.
A sensitive and selective fluorescent sensor for flumioxazin was designed based on the formation of
strong fluorescence compound (1,2,3-triazole compounds) via the reaction of the alkynyl group in
flumioxazin with 3-azido-7-hydroxycoumarin, a weak-fluorescent compound, through the Cu+-catalysed
azide–alkyne cycloaddition (CuAAC) reaction. The fluorescence increase factor (represented by F/F0) of
the system exhibited a good linear relationship with the concentrations of flumioxazin in the range of
0.25–6.0 lg/L with a detection limit of 0.18 lg/L (S/N = 3). Also, the proposed fluorescent sensor
demonstrated good selectivity for flumioxazin assay even in the presence of high concentration of other
pesticides. Based on such high sensitivity and selectivity, the proposed fluorescent sensor has been
applied to test the flumioxazin residue in some vegetable and water samples with satisfied results.
2014 Elsevier Ltd. All rights reserved.
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