Fluorescence Turn-Off-On Sensing Strategy for the Detection of Pb 2+ and Metalaxyl Fungicide Using Yellow Fluorescent Carbon Dots From Cordia dichotoma Fruits.

Autor: Vadia FY; Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India., Malek NI; Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India., Park TJ; Department of Chemistry, Research Institute of Chem-Bio Diagnostic Technology, Chung-Ang University, Seoul, Dongjak-gu, Republic of Korea., Kailasa SK; Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India.
Jazyk: angličtina
Zdroj: Luminescence : the journal of biological and chemical luminescence [Luminescence] 2024 Nov; Vol. 39 (11), pp. e70040.
DOI: 10.1002/bio.70040
Abstrakt: In this work, a facile and rapid fluorescence turn-off-on sensing method was developed for the detection of Pb 2+ and metalaxyl fungicide in environmental samples using yellow carbon dots (CDs) from Cordia dichotoma fruits. The prepared C. dichotoma-CDs showed the emission band (𝜆 Em ) at 535 nm under 448 nm of excitation wavelength. The fluorescence intensity of C. dichotoma-CDs quenches by Pb 2+ ion and then restores by metalaxyl fungicide, favoring to develop a fluorescence turn-off-on sensing strategy. The intensity ratios (I 0 /I and I/I 0 ) are linear against Pb 2+ (0.01-50 μM) and metalaxyl fungicide (0.025-10 μM) concentrations, offering the detection limits of 0.0054 and 0.0087 μM for Pb 2+ and metalaxyl fungicide, respectively. Additionally, the potential application of C. dichotoma-CD-based fluorescence turn-off-on sensing approach was effectively demonstrated for Pb 2+ and metalaxyl fungicide assays in real samples, which confirms that C. dichotoma-CDs act as "turn-off-on" fluorescent probe for assaying of Pb 2+ and metalaxyl fungicide, respectively.
(© 2024 John Wiley & Sons Ltd.)
Databáze: MEDLINE
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