Selective detection of parathion-methyl based on near-infrared CuInS2 quantum dots

Yan, Xu; Li, Hongxia; Yan, Yu; Su, Xingguang

doi:10.1016/j.foodchem.2014.09.152

Cited by 68 publications

(30 citation statements)

References 36 publications

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“…However, most of these sensors present some drawbacks that are peculiar of protein‐based systems, such as long measuring times and limitations because of pH, temperature and solvents. Important achievements have been recently reached by using advanced functional materials making use of carbon nanotubes, graphene, metal–organic frameworks, molecularly imprinted materials and both inorganic and organic quantum dots. Molecularly imprinted materials, in particular, have proved to be easy to handle, cost‐effective, portable, and with good sensitivity, reliability and reproducibility .…”

Section: Introductionmentioning

confidence: 99%

Selective detection of organophosphate through molecularly imprinted GERS‐active hybrid organic–inorganic materials

Carboni

Jiang

Malfatti

et al. 2017

J Raman Spectroscopy

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A selective sensing platform for the organophosphate paraoxon, a highly toxic organic pollutant, has been designed and tested on water samples. A porous hybrid organic-inorganic film, synthesised using tetraethoxysilane, 1,8-bis(triethoxysilyl) octane and cetyltrimethylammonium bromide, has been molecularly imprinted with a structural analogue of paraoxon, the diethyl(4-nitrobenzyl)phosphonate, to induce selective recognition. Exfoliated graphene has been incorporated into the porous matrix to provide enhancement of the Raman scattering signal. The Raman sensor has been tested on different concentrations of paraoxon in both ethanol and water/ethanol mixture. The molecular selectivity has been assessed by comparing the Raman signal enhancement of paraoxon with a similar organophosphate, the bis-(4-nitrophenyl) phosphate. The molecularly imprinted film has shown a fourfold increase of the paraoxon signal, when compared with the corresponding not-imprinted. The evaluation of the density of molecular cavities into the molecularly imprinted samples (4.50 * 10 À10 μmol μm À3) has allowed assuming that each molecular cavity is capable of providing a remarkable signal enhancement of 1.47 * 10 12 count * μmol À1 only when recognising paraoxon. The material design has allowed coupling the sensitivity of the graphene-mediated enhancement of Raman scattering with the selectivity of molecular imprinting into a single and potentially portable, analytical system.

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Section: Introductionmentioning

confidence: 99%

Selective detection of organophosphate through molecularly imprinted GERS‐active hybrid organic–inorganic materials

Carboni

Jiang

Malfatti

et al. 2017

J Raman Spectroscopy

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“…All the required substances are easily synthesized and do not harm the environment. Yan's research 39 showed that in an acid environment, the structure of CuInS 2 QDs would be destroyed, and in an alkaline environment, Cu(OH) 2 (Fig. 4(a and b)).…”

Section: Quenching Effect Of Cu(ida)$2h 2 O On Cuinsmentioning

confidence: 99%

“…37 Other studies used the specicity of organophosphorus hydrolase (OPH) to detect parathion, 38 and parathion-methyl. 39 Specic antibodies or aptamers have also been used to identify paraquat, 40 and acetamiprid. 41 These substances increase the costs and affect device stability and practicability.…”

Section: Introductionmentioning

confidence: 99%

Selective detection of glufosinate using CuInS₂ quantum dots as a fluorescence probe

Zhu

Zhang

2017

RSC Adv.

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We designed a novel method for rapid detection of glufosinate, based on quantum dots (QDs) as a fluorescence probe. To date, no studies have been published on the detection of glufosinate usingQDs. The innovation of this fluorescence system, which was constructed using CuInS 2 QDs and Cu(IDA)$ 2H 2 O, is based on the use of intermolecular hydrogen bonds between Cu(IDA)$2H 2 O and carboxyl group (-COOH) to detect glufosinate. In the fluorescence "turn-on" step, the presence of glufosinate induces the release of Cu(IDA)$2H 2 O from the surface of the QDs, resulting in fluorescence intensity recovery. This method was performed in relatively clean aqueous solutions. Under optimal conditions, the calibration curve of the method showed good linearity for glufosinate, with a correlation coefficient (R 2 ) of 0.99597. The method was employed to detect glufosinate on fresh tea-leaves, with satisfactory results.

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“…[40][41][42][43][44] However, these analytical methods usually suffer from extensive analyticalp rocessing, laborious synthetic procedures,alack of specificity,a nd expensive instrumentation.A lthoughc hemosensorsh ave also been developed for detecting methylp arathion, the main hindrance in the path of their development is the interference from other structurally similar aromatic phosphate esters. [45][46][47][48][49][50]…”

Section: Introductionmentioning

confidence: 99%

Catalytic Chemosensing Assay for Selective Detection of Methyl Parathion Organophosphate Pesticide

Zheng

Shen²,

Tang

et al. 2019

Chemistry A European J

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Herein, a catalytic chemosensing assay (CCA), based on a bimetallic complex, [RuII(bpy)2(CN)2]2(CuII)2 (bpy=2,2′‐bipyridine), is described. This complex integrates a task‐specific catalyst (CuI‐catalyst) and a signaling unit ([RuII(bpy)2(CN)2]) to specifically hydrolyze methyl parathion, a highly toxic organophosphate (OP) pesticide. The bimetallic complex catalyzed the hydrolysis of the phosphate ester to generate o,o‐dimethyl thiophosphate (DTP) anion and 4‐nitrophenolate. Intrinsically, 4‐nitrophenolate absorbed UV/Vis light at λmax=400 nm, creating the first level of the chemosensing signal. DTP interacted with the original complex to displace the chromophore, [RuII(bpy)2(CN)2], which was monitored by spectrofluorometry; this was classified as the second level of chemosensing signal. By integrating both spectroscopic and spectrofluorometric signals with a simple AND logic gate, only methyl parathion was able to provide a positive response. Other aromatic and aliphatic OP pesticides (diazinon, fenthion, meviphos, terbufos, and phosalone) and 4‐nitrophenyl acetate provided negative responses. Furthermore, owing to the metal‐catalyzed hydrolysis of methyl parathion, the CCA system led to the detoxification of the pesticide. The CCA system also demonstrated its catalytic chemosensing properties in the detection of methyl parathion in real samples, including tap water, river water, and underground water.

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Selective detection of parathion-methyl based on near-infrared CuInS2 quantum dots

Cited by 68 publications

References 36 publications

Selective detection of organophosphate through molecularly imprinted GERS‐active hybrid organic–inorganic materials

Selective detection of organophosphate through molecularly imprinted GERS‐active hybrid organic–inorganic materials

Selective detection of glufosinate using CuInS₂ quantum dots as a fluorescence probe

Catalytic Chemosensing Assay for Selective Detection of Methyl Parathion Organophosphate Pesticide

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Selective detection of parathion-methyl based on near-infrared CuInS2 quantum dots

Cited by 68 publications

References 36 publications

Selective detection of organophosphate through molecularly imprinted GERS‐active hybrid organic–inorganic materials

Selective detection of organophosphate through molecularly imprinted GERS‐active hybrid organic–inorganic materials

Selective detection of glufosinate using CuInS2 quantum dots as a fluorescence probe

Catalytic Chemosensing Assay for Selective Detection of Methyl Parathion Organophosphate Pesticide

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Product

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Selective detection of glufosinate using CuInS₂ quantum dots as a fluorescence probe