Fluorescence Turn-Off-On Sensing Strategy for the Detection of Pb2+ and Metalaxyl Fungicide Using Yellow Fluorescent Carbon Dots From Cordia dichotoma Fruits

IF 3.2 4区化学 Q2 CHEMISTRY, ANALYTICAL Luminescence Pub Date : 2024-11-25 DOI:10.1002/bio.70040

Foziya Yusuf Vadia, Naved I. Malek, Tae Jung Park, Suresh Kumar Kailasa

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Abstract

In this work, a facile and rapid fluorescence turn-off-on sensing method was developed for the detection of Pb²⁺ 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 Pb²⁺ ion and then restores by metalaxyl fungicide, favoring to develop a fluorescence turn-off-on sensing strategy. The intensity ratios (I₀/I and I/I₀) are linear against Pb²⁺ (0.01–50 μM) and metalaxyl fungicide (0.025–10 μM) concentrations, offering the detection limits of 0.0054 and 0.0087 μM for Pb²⁺ and metalaxyl fungicide, respectively. Additionally, the potential application of C. dichotoma-CD-based fluorescence turn-off-on sensing approach was effectively demonstrated for Pb²⁺ and metalaxyl fungicide assays in real samples, which confirms that C. dichotoma-CDs act as “turn-off-on” fluorescent probe for assaying of Pb²⁺ and metalaxyl fungicide, respectively.

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利用帘子草果实中的黄色荧光碳点检测 Pb2+ 和 Metalaxyl 杀菌剂的荧光开关传感策略

本研究利用堇菜果实中的黄色碳点（CDs）开发了一种简便快速的荧光开关传感方法，用于检测环境样品中的 Pb2+ 和 metalaxyl 杀菌剂。在 448 nm 的激发波长下，制备的 C. dichotoma-CDs 在 535 nm 处显示出发射带（𝜆Em）。C. dichotoma-CDs 的荧光强度先被 Pb2+ 离子淬灭，然后在杀菌剂 metalaxyl 的作用下恢复。荧光强度比（I0/I 和 I/I0）与 Pb2+（0.01-50 μM）和 metalaxyl 杀菌剂（0.025-10 μM）浓度呈线性关系，Pb2+ 和 metalaxyl 杀菌剂的检测限分别为 0.0054 和 0.0087 μM。此外，基于 C. dichotoma-CD 的荧光关断-开启传感方法在实际样品的 Pb2+和杀菌剂检测中得到了有效应用，证实了 C. dichotoma-CD 可分别作为 Pb2+和杀菌剂检测的 "关断-开启 "荧光探针。

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来源期刊

Luminescence 生物-生化与分子生物学

CiteScore

5.10

自引率

13.80%

发文量

248

审稿时长

3.5 months

期刊介绍： Luminescence provides a forum for the publication of original scientific papers, short communications, technical notes and reviews on fundamental and applied aspects of all forms of luminescence, including bioluminescence, chemiluminescence, electrochemiluminescence, sonoluminescence, triboluminescence, fluorescence, time-resolved fluorescence and phosphorescence. Luminescence publishes papers on assays and analytical methods, instrumentation, mechanistic and synthetic studies, basic biology and chemistry. Luminescence also publishes details of forthcoming meetings, information on new products, and book reviews. A special feature of the Journal is surveys of the recent literature on selected topics in luminescence.