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Novel carbon quantum dot fluorescence nanosensor for selective detection of flumioxazin in real samples

Abstract

Carbon quantum dot based highly selective luminescent probe has been designed for the detection of pesticide flumioxazin via alkyne azide click reaction. Azide (N3) functionalized QD has been synthesized by conjugating 4-azidoaniline on the surface of CQD through carbodiimide coupling. The turn-on fluorescence of the probe on addition of flumioxazin is attributed to the formation of triazole functionalized CQD in presence of Cu(II) and ascorbic acid. The sensing protocol was also sucessfully validated in a number of compounds containing alkynyl group. The fluorescence increase factor for flumioxazin (F/F0) works linearly in the concentration range 0-35.4µg/L and the limit of detection is found to be 0.027µg/L. The specific recognition of alkynyl groups towards azide in presence of Cu (II) makes our probe specific and selective towards flumioxazin even in presence of other pesticides. The utility of the developed sensor has also been explored in real agricultural samples.

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Publication details

The article was received on 10 Nov 2017, accepted on 26 Dec 2017 and first published on 27 Dec 2017


Article type: Paper
DOI: 10.1039/C7NJ04358A
Citation: New J. Chem., 2017, Accepted Manuscript
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    Novel carbon quantum dot fluorescence nanosensor for selective detection of flumioxazin in real samples

    S. Panda, A. Jadav, N. Panda and S. Mohapatra, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ04358A

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