PVP-gold-copper nanocluster based NIR fluorescence probe for sensitive detection of malachite green

Malachite green (MG) is considered an environmental contaminant because of its antifungal, carcinogenic and teratogenic properties. The existing detection methods of MG are complex, costly and laborious. In this study, a simple and cost-effective method of MG detection has been developed and success...

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Bibliographic Details
Published in:New journal of chemistry 2022-01, Vol.46 (4), p.1658-1664
Main Authors: Li, Zhiying, Shen, Tian, Gu, Jianxia, Chattha, Sadaqat Ali
Format: Article
Language:English
Subjects:
Carcinogens
Contaminants
Copper
Electron transfer
Energy transfer
Fluorescent indicators
Fungicides
Gold
Malachite green
Mercaptobenzothiazole
Nanoclusters
Polyethylenes
Room temperature
Selectivity
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Summary:Malachite green (MG) is considered an environmental contaminant because of its antifungal, carcinogenic and teratogenic properties. The existing detection methods of MG are complex, costly and laborious. In this study, a simple and cost-effective method of MG detection has been developed and successfully applied to aquatic products through constructing a fluorescent sensor based on stable polyethylene pyrrolidone-gold-copper nanoclusters (PVP-Au/CuNCs). PVP-Au/CuNCs were synthesized with 2-mercaptobenzothiazole (MBT) as a protective agent at room temperature. The prepared PVP-Au/CuNCs demonstrated bright red fluorescence and excitation/emission peaks at 390/605 nm, and the fluorescence intensity of the PVP-Au/CuNCs can change when mixed with MG. The quenching effect of MG towards the PVP-Au/CuNCs can be attributed to the electron transfer between MG and MBT, causing the PVP-Au/CuNCs to lose protection from MBT, further resulting in fluorescence resonance energy transfer (FRET) between MG and the PVP-Au/CuNCs. The proposed sensor exhibited good selectivity with a wide linear range from 0.05 to 25 μM for the determination of MG, and the corresponding detection limit is found to be 16 nM (S/N = 3), so it could be a good alternative to existing MG detection methods. A novel NIR fluorescent probe based on PVP-Au/CuNCs has been developed, exhibiting good selectivity and stability for detecting malachite green (MG).
ISSN:1144-0546
1369-9261
DOI:10.1039/d1nj04943g