A novel pyrenyl salicylic acid fluorophore for highly selective detection of paraquat in aqueous media

Yuttakovit, Suwanun; Santiwat, Thanapich; Pratumyot, Kornkanya; Srikittiwanna, Kittiwat; Sukwattanasinitt, Mongkol; Niamnont, Nakorn

doi:10.1016/j.jphotochem.2020.112570

Cited by 12 publications

(5 citation statements)

References 52 publications

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“…QAPs exhibit very weak or no fluorescence in an aqueous solution, which hinders their direct determination using fluorescence methods. Fluorescence sensors for various QAPs have been previously reported and their sensing materials range from single molecules to complex mixtures. , However, the reported fluorescence sensing methods for detecting QAPs can only detect one or two components, which further extends the analysis time for comprehensive evaluation. Supramolecular sensor arrays have the advantage of detecting analytes and removing pollutants in complex mixtures, for example, some difficult detection tasks such as explosives, metal ions and anions, and biomarkers for cancer and disease have been achieved using supramolecular sensor arrays. − Cucurbit[n]uril (Q[n]) is a macrocyclic compound with a rigid hydrophobic cavity and two polar carbonyl ports.…”

Section: Introductionmentioning

confidence: 99%

Supramolecular Fluorescence Sensor Array Based on Cucurbit[8]uril Complexes Used for the Detection of Multiplex Quaternary Ammonium Pesticides

Wei

Yang

Huang

et al. 2023

J. Agric. Food Chem.

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The simultaneous detection of multiple quaternary ammonium pesticides (QAPs) in water is a challenge due to their high solubility in water and similar structures. In this paper, we have developed a quadruple-channel supramolecular fluorescence sensor array for the simultaneous analysis of five QAPs, including paraquat (PQ), diquat (DQ), difenzoquat (DFQ), mepiquat (MQ), and chlormequat (CQ). Not only were QAP samples of different concentrations (10, 50, and 300 μM) in water distinguished with 100% accuracy but also single QAP and binary QAP mixed samples (DFQ-DQ) were sensitively quantified. Our experimental interference study confirmed that the developed array has good anti-interference ability. The array can quickly identify five QAPs in river and tap water samples. In addition, it also qualitatively detected QAP residues in Chinese cabbage and wheat seedlings extract. This array has rich output signals, low cost, easy preparation, and simple technology, demonstrating great potential in environmental analysis.

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Section: Introductionmentioning

confidence: 99%

Supramolecular Fluorescence Sensor Array Based on Cucurbit[8]uril Complexes Used for the Detection of Multiplex Quaternary Ammonium Pesticides

Wei

Yang

Huang

et al. 2023

J. Agric. Food Chem.

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“…Besides, the U.S. Environmental Protection Agency (USEPA) limit of PQ residues is 200 μg/L (7.8 × 10 −7 M) in drinking water. 7,8 At present, there are many methods to detect pesticides, such as gas chromatography−mass spectrometry, 9,10 liquid chromatography−mass spectrometry, 10,11 surface-enhanced Roman spectroscopy, 12,13 and electrochemical methods. 14,15 Although these methods are sensitive and accurate, they require expensive instruments, complex pretreatment, or highly trained technicians, making them unsuitable for low-cost and on-site analysis.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the maximum dose of PQ is approximately 0.05 mg/kg in leafy vegetables and 0.01 mg/kg in pulp fruit (GB 2763-2021). Besides, the U.S. Environmental Protection Agency (USEPA) limit of PQ residues is 200 μg/L (7.8 × 10 –7 M) in drinking water. , At present, there are many methods to detect pesticides, such as gas chromatography–mass spectrometry, , liquid chromatography–mass spectrometry, , surface-enhanced Roman spectroscopy, , and electrochemical methods. , Although these methods are sensitive and accurate, they require expensive instruments, complex pretreatment, or highly trained technicians, making them unsuitable for low-cost and on-site analysis. Thus, it is essential to develop a rapid, simple, and portable analysis method for real-time and on-site monitoring of PQ.…”

Section: Introductionmentioning

confidence: 99%

Fluorescent and Colorimetric Ionic Probe Based on Fluorescein for the Rapid and On-Site Detection of Paraquat in Vegetables and the Environment

Che

Peng

Zhuge

et al. 2022

J. Agric. Food Chem.

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Detection of pesticide paraquat (PQ) is of considerable significance to ensure food safety, and its rapid and on-site detection is still a challenge. Aimed at the ion characteristics of PQ, an “enrichment and detection” strategy was proposed to improve the sensitivity through electrostatic attractions, and the ion characteristic of probes was adopted to increase the portability through avoiding aggregation-caused quenching effects in the paper strips. Herein, a novel anion-functionalized ionic liquid (IL) probe with a large conjugated plane and rich π-electrons ([Fluo][P66614]2) was designed as a fluorescent and colorimetric dual-channel probe to sensitively and rapidly detect trace amounts of PQ in vegetables and the environment. The proposed probe exhibited good linearity with a detection limit of 64.0 nM in the PQ concentration range of 0.3–7.0 μM (fluorometry) and 0.1 μM in that of 0.1–8.0 μM (colorimetry), respectively. In addition, it displayed a rapid fluorescence quenching response from green to dark (<5 s) and excellent anti-interference (among 23 other pesticides) due to dual effects of electrostatic attraction and π–π stacking. Most importantly, the lipophilic IL probe could be applied in real vegetables and environmental samples with a satisfying recovery rate of 98–103% and assembled into a handy paper strip that achieved the visual semiquantitative detection of PQ. This ionic probe provides a feasible approach for rapidly and conveniently detecting PQ for ensuring agricultural and food safety and opens a new avenue to detect ion-responsive analytes in real complex samples by an “enrichment and detection” strategy.

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“…3 Among the available pesticides, Paraquat (PQ), (1,1-dimethyl-4,4-pyridinium dichloride), also known as methyl-viologen (MV), is one of the dipyridyl, broad-spectrum, non-selective herbicides, widely used for clearing, pasture renovation, in inter-row weed control in vegetable crops and weed control in plantation crops. [4][5][6][7][8][9] It effectively helps in weed control by inhibiting photosynthesis in plants. 9,10 The drawback associated with PQ is that it strongly binds with soil in a very short duration of time and becomes resistive towards microbial action and sunlight.…”

mentioning

confidence: 99%

“…[4][5][6][7][8][9] It effectively helps in weed control by inhibiting photosynthesis in plants. 9,10 The drawback associated with PQ is that it strongly binds with soil in a very short duration of time and becomes resistive towards microbial action and sunlight. Hence, PQ is highly persistent in the environment.…”

mentioning

confidence: 99%

Electrochemical Determination of Paraquat Using Gold Nanoparticle Incorporated Multiwalled Carbon Nanotubes

Rajaram¹,

GURUSAMY²,

Ramanujam³

et al. 2022

J. Electrochem. Soc.

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The present work focuses on electrochemical estimation of the herbicide, paraquat using Au nanoparticle incorporated multi-walled carbon nanotube (AuNP-MWCNT). The catalyst was synthesised and characterised using physical characterization techniques like HRSEM, HRTEM, Raman spectroscopy, and XRD. The techniques reveal the successful incorporation of Au nanoparticles onto MWCNT and it was utilized for the electrochemical determination of paraquat (PQ). The AuNP-MWCNT modified glassy carbon electrode (AuNP-MWCNT/GCE) was able to detect PQ reversibly using cyclic voltammetric analysis. From the electrochemical tests, it was discovered that the electrode is an efficient catalyst for the effective electrochemical sensing of PQ. Using cathodic stripping square wave voltammetric technique (CSSWV), the sensitivity and limit of detection of the matrix against PQ was evaluated. They were found to be 0.197 mA/µM and 32 nM, respectively in the concentration range of 1.0 µM to 2.0 µM with the regression coefficient value of 0.99. Further, selectivity studies clearly demonstrated that the proposed catalyst was interference-free from other possible foreign molecules. The practical applicability of the electrode was checked in the electrolyte containing real samples and the appreciable recovery was achieved.

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A novel pyrenyl salicylic acid fluorophore for highly selective detection of paraquat in aqueous media

Cited by 12 publications

References 52 publications

Supramolecular Fluorescence Sensor Array Based on Cucurbit[8]uril Complexes Used for the Detection of Multiplex Quaternary Ammonium Pesticides

Supramolecular Fluorescence Sensor Array Based on Cucurbit[8]uril Complexes Used for the Detection of Multiplex Quaternary Ammonium Pesticides

Fluorescent and Colorimetric Ionic Probe Based on Fluorescein for the Rapid and On-Site Detection of Paraquat in Vegetables and the Environment

Electrochemical Determination of Paraquat Using Gold Nanoparticle Incorporated Multiwalled Carbon Nanotubes

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