Determination of Paraquat by Cucurbit[7]uril Sensitized Fluorescence Quenching Method

Xing, Xiaoqing; Zhou, Yue; Sun, Junyong; Tang, Dongbao; Li, Tao; Wu, Kai

doi:10.1080/00032719.2012.729240

Cited by 22 publications

(11 citation statements)

References 32 publications

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“…Thus, it was concluded that the fluorescent biosensor responded to furazolidone without the interference of other pesticides. Although fluorescent biosensor owns advantages for its simple preparation, high specificity, biocompatibility, and less poisonousness, only a few methods for pesticides detection based on fluorescent analyses have been developed (Hai et al, 2013;Xing et al, 2013). Moreover, few fluorescent sensors for the detection of pesticides by biological recognition element were established.…”

Section: Specificity Of Furazolidone Detection By Fluorescent Biosensormentioning

confidence: 99%

Pyoverdine secreted by Pseudomonas aeruginosa as a biological recognition element for the fluorescent detection of furazolidone

Yin

Zhang

Chen

2014

Biosensors and Bioelectronics

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a b s t r a c tMethods for the rapid and sensitive detection of furazolidone, a pesticide used for the treatment of infections of animals and human beings, have been urgently recommended for its large residual, strong carcinogenicity and genotoxicity in the environment. In this study, a method for the detection of furazolidone based on the rapid fluorescence quenching of pyoverdine by furazolidone was developed. Pyoverdine secreted by a Pseudomonas aeruginosa strain PA1 was purified through affinity chromatography and its fluorescent property was characterized. The fluorescence of pyoverdine could be quenched by furazolidone with specificity, and based on this phenomenon a fluorescent method for furazolidone detection was established. Fluorescence of pyoverdine was quenched by furazolidone probably due to the electron transfer from pyoverdine to furazolidone. The optimal pH for the detection was 7.2 in 50 mM 3-(N-Morpholino) propanesulfonic acid solution, and the whole detection process could be completed within a few seconds. The linear range of the detection was 2-160 mM and the limit of detection (LOD) was 0.5 mM. This study developed a novel fluorescent method for furazolidone detection, and the rapid and specific fluorescent biosensor can be potentially applied for furazolidone detection in the aquatic samples.

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Section: Specificity Of Furazolidone Detection By Fluorescent Biosensormentioning

confidence: 99%

Pyoverdine secreted by Pseudomonas aeruginosa as a biological recognition element for the fluorescent detection of furazolidone

Yin

Zhang

Chen

2014

Biosensors and Bioelectronics

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“…An interesting example was seen in the detection of the pesticide paraquat (Chen et al, 2010;Vaccari et al, 2017;, which is also a well-known fluorescence quencher (Schibilla et al, 2016;Willis-Fox et al, 2016). Detection of paraquat using cucurbiturils was accomplished through first forming a complex between cucurbituril and acridine orange, resulting in enhanced fluorescence of the acridine orange dye (Xing et al, 2013). Subsequent addition of paraquat caused a displacement of the dye from the cucurbituril cavity due to the high binding affinity of paraquat for cucurbituril, and formation of a cucurbituril: paraquat supramolecular complex, resulting in overall fluorescence quenching.…”

Section: Cucurbiturilsmentioning

confidence: 99%

Fluorescence-Based Sensing of Pesticides Using Supramolecular Chemistry

Levine

2021

Front. Chem.

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The detection of pesticides in real-world environments is a high priority for a broad range of applications, including in areas of public health, environmental remediation, and agricultural sustainability. While many methods for pesticide detection currently exist, the use of supramolecular fluorescence-based methods has significant practical advantages. Herein, we will review the use of fluorescence-based pesticide detection methods, with a particular focus on supramolecular chemistry-based methods. Illustrative examples that show how such methods have achieved success in real-world environments are also included, as are areas highlighted for future research and development.

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“…Fluorescent probes have received substantial attention because of their rapid response, visual detection, and ease of functionalization and observation. − In these sensing events, covalent and noncovalent recognition mechanisms are employed to detect DNA, proteins, polysaccharides, enzymes, small biomolecules, metal ions, inorganic anions, organic contaminants, and so on. − Various luminescent materials have been used for the construction of fluorescent sensing systems, such as quantum dots, nanoparticles and clusters of noble metals, metal–organic frameworks, covalent organic frameworks, conjugated polymers, and small-molecule materials. ,− Among these, pyrenes are organic conjugated compounds with extensive applications in food safety, biomedicine, and environmental monitoring due to their high quantum yield, good stability, ratiometric signaling mode, and long fluorescent lifetime. − There are numerous pyrenyl probes designed and synthesized for chemical and biological sensors . However, the main efforts are focused on the tedious modification of pyrene structures to specifically bind analytes; − whereas few strategies have been reported for improving the sensitivity of pyrenyl probes.…”

Section: Introductionmentioning

confidence: 99%

Rapid and Visual Detection of Bipyridylium Herbicides Based on Polyelectrolyte-Induced Nanoassemblies of Pyrenyl Probes

Xiao

Zhang

et al. 2020

ACS Sustainable Chem. Eng.

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In this work, we report a novel fluorimetric sensing system for the visual and rapid detection of bipyridylium herbicides (paraquat and diquat) using a polyelectrolyte-induced nanoassembly strategy in 100% aqueous media. This approach relies on the formation of supramolecular assemblies between a pyrenyl probe (N,N,N-trimethyl-4-(pyren-1-yl)butan-1-aminium bromide, PyBTA) and a polyelectrolyte (poly(4-styrenesulfonic acid), PSS), which could promote paraquat complexation by the synergy of noncovalent forces such as electrostatic and π−π stacking interactions. Compared with the traditional direct recognition method, the proposed method shows a 500-fold higher sensitivity, and the detection limit is as low as 40 nM. This assay can be performed within 15 s and can be observed by the naked eye with a visual detection limit of 0.5 μM. Excellent selectivity for paraquat and diquat is demonstrated by a comparison with other pesticides and common ions. This method can be applied to monitor paraquat concentrations in vegetable and soil samples. This approach was validated by paraquat spiking experiments at multiple levels (recovery: 101.2%−104.1%; relative standard deviation (RSD): 2.3%−6.1%; uncertainty: 0.014−0.035). To the best of our knowledge, this is the first pyrenyl nanoassembly system constructed for detecting bipyridylium herbicides in aqueous solution. We believe the present work will not only broaden the scope of polyelectrolyte-induced nanoassembly based sensors but also provide important information for the design of novel synergistic methods for rapid detection technology.

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Determination of Paraquat by Cucurbit[7]uril Sensitized Fluorescence Quenching Method

Cited by 22 publications

References 32 publications

Pyoverdine secreted by Pseudomonas aeruginosa as a biological recognition element for the fluorescent detection of furazolidone

Pyoverdine secreted by Pseudomonas aeruginosa as a biological recognition element for the fluorescent detection of furazolidone

Fluorescence-Based Sensing of Pesticides Using Supramolecular Chemistry

Rapid and Visual Detection of Bipyridylium Herbicides Based on Polyelectrolyte-Induced Nanoassemblies of Pyrenyl Probes

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