NDLI: "Off-on" fluorescence probe based on green emissive carbon dots for the determination of Cu<sup>2+</sup> ions and glyphosate and development of a smart sensing film for vegetable packaging.

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"Off-on" fluorescence probe based on green emissive carbon dots for the determination of Cu²⁺ ions and glyphosate and development of a smart sensing film for vegetable packaging.

Content Provider	Europe PMC
Author	Wu, Jiajie Chen, Xiaoyong Zhang, Zeyu Zhang, Jiamin
Abstract	An ultra-sensitive glyphosate nanosensor, based on carbon dots (CDs), was successfully developed with excellent long-wavelength emission (530 nm), a high quantum yield (41.3%), and an impressive detection limit (0.8 ng·mL−1). This is the lowest value for glyphosate detection achieved by CD-based fluorescence analysis. The sensor was derived from a separate precursor, 1,4-dihydroxyanthraquinone, and was based on the “off-on” fluorescence analysis, where Cu2+ acts as a dynamic quencher and glyphosate as a fluorescence restorer (excitation wavelength 460 nm). Trace detection of glyphosate is possible with a wide detection range of 50–1300 ng·mL−1 and spiked recoveries between 93.3 and 110.0%. Exploration in depth confirmed that (1) the fluorescence of CDs was derived from the carbon core, (2) the large sp2 conjugated domain consisting of graphitic carbon and nitrogen contributed to the long-wavelength emission, and (3) CDs had an impressive binding interaction with Cu2+, which endow high sensitivity to glyphosate detection. The nanosensor has also be used as a dual-mode visual sensor and a smart sensing membrane that can identify glyphosate on the surface of vegetables, thus showing good practical applicability.Graphical abstractSynthetic methods of G-CDs and its detection mechanisms for glyphosate.Supplementary InformationThe online version contains supplementary material available at 10.1007/s00604-022-05241-5.
Related Links	https://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC8893061&blobtype=pdf
ISSN	00263672
Journal	Mikrochimica Acta [Mikrochim Acta]
Volume Number	189
DOI	10.1007/s00604-022-05241-5
PubMed Central reference number	PMC8893061
Issue Number	3
PubMed reference number	35239060
e-ISSN	14365073
Language	English
Publisher	Springer Vienna
Publisher Date	2022-03-03
Publisher Place	Vienna
Access Restriction	Open
Rights License	This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic. © The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature 2022
Subject Keyword	Fluorescent Carbon dots Nanosensor Cu2+ and glyphosate detection Smart packaging
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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"Off-on" fluorescence probe based on green emissive carbon dots for the determination of Cu2+ ions and glyphosate and development of a smart sensing film for vegetable packaging.

"Off-on" fluorescence probe based on green emissive carbon dots for the determination of Cu²⁺ ions and glyphosate and development of a smart sensing film for vegetable packaging.