Development of an eco-friendly fluorescence nanosensor based on molecularly imprinted polymer on silica-carbon quantum dot for the rapid indoxacarb detection

Shirani, Marziyeh Poshteh; Rezaei, Behzad; Ensafi, Ali A.; Ramezani, Mohammad

doi:10.1016/j.foodchem.2020.127920

Cited by 64 publications

(16 citation statements)

References 32 publications

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“…The characteristic peak of the Si–O–Si [ 27 ] stretching vibration is a wide peak of 1000~1100 cm −1 , the asymmetric tensile vibration peaks of Si-O are 467.85 cm −1 and 792.01 cm −1 and the stretching vibration peaks of the amino group are 3424.23 cm −1 and 1654.68 cm −1 [ 27 ], indicating that CAP has successfully been grafted on the surface of SiO 2 @QDs. In the infrared spectrum of CAP ( Figure 3 d), the characteristic absorption peaks at 1458.73 and 1508.96 cm −1 which are attributed to the stretching vibration of aromatic ring in CAP molecule [ 41 ] can be observed. However, as shown in Figure 3 b,c, the absorption peaks at 1458.73 cm −1 and 1508.96 cm −1 [ 32 ] are significantly different from those in Figure 3 a, suggesting that CAP was effectively eluted.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the fluorescence emission spectrum greatly demonstrates that CAP has participated in SiO 2 @QDs. As shown in Figure 4 , the fluorescence emission spectrum of MIP@SiO 2 @QDs showed a slightly red shift compared to CdTe QDs, which was based on the fact that the porous nature of the silica layer provided a sufficiently open pathway for diffusion and interaction with the core of small molecules, and thus small molecules in the solution diffused into the silica layer and interacted with the core of QDs, resulting in the passivation of the surface of the QDs and the red-shifting of the fluorescence emission peak [ 41 ]. In addition, compared with MIP@SiO 2 @CAP, the fluorescence emission intensity of the MIP@SiO 2 @QDs was obviously higher.…”

Section: Resultsmentioning

confidence: 99%

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Molecularly Imprinted Silica-Coated CdTe Quantum Dots for Fluorometric Determination of Trace Chloramphenicol

Chen

Liu

et al. 2021

Molecules

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A dual recognition system with a fluorescence quenching of quantum dots (QDs) and specific recognition of molecularly imprinted polymer (MIP) for the detection of chloramphenicol (CAP) was constructed. MIP@SiO2@QDs was prepared by reverse microemulsion method with 3-aminopropyltriethoxysilane (APTS), tetraethyl orthosilicate (TEOS) and QDs being used as the functional monomer, cross-linker and signal sources, respectively. MIP can specifically recognize CAP, and the fluorescence of QDs can be quenched by CAP due to the photo-induced electron transfer reaction between CAP and QDs. Thus, a method for the trace detection of CAP based on MIP@SiO2@QDs fluorescence quenching was established. The fluorescence quenching efficiency of MIP@SiO2@QDs displayed a desirable linear response to the concentration of CAP in the range of 1.00~4.00 × 102 μmol × L−1, and the limit of detection was 0.35 μmol × L−1 (3σ, n = 9). Importantly, MIP@SiO2@QDs presented good detection selectivity owing to specific recognition for CAP, and was successfully applied to quantify CAP in lake water with the recovery ranging 102.0~104.0%, suggesting this method has the promising potential for the on-site detection of CAP in environmental waters.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Molecularly Imprinted Silica-Coated CdTe Quantum Dots for Fluorometric Determination of Trace Chloramphenicol

Chen

Liu

et al. 2021

Molecules

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“…The QDs used in the protocols should be modified before the imprinting process. Examples include TGA-capped CdTe@CdS [ 20 ], MPTS-Capped Mn-Doped ZnS QDs [ 23 , 30 ], CdTe@SiO 2 QDs [ 31 ], TGA-capped CdTe QDs [ 25 , 26 ], SiCQDs [ 32 ], and APTS-modified GQDs [ 21 ]. In general, the polymerization protocol described for Stöber method includes a polymerization mixture formed by (3-aminopropyl)triethoxysilane (APTES) as functional monomer, TEOS as cross-linker, NH 3 ·H 2 O as a catalyst and the chosen template.…”

Section: Strategies For the Preparation Of Mip-qds Optical Sensorsmentioning

confidence: 99%

“…As a control material, non-imprinted polymers (NIPs) are synthesized in the same way except for the addition of the template. Silica-based MIP-QDs sensors prepared in this manner have been successfully applied for the optosensing determination of perfluorooctanoic acid [ 20 ], pentachlorophenol [ 23 ], amoxicillin [ 26 ], patulin [ 30 ], p-aminophenol [ 31 ], indoxacarb [ 32 ], metronidazole [ 21 ] and sinapic acid [ 33 ] in different matrices being water, food and biological samples the most common. The reported imprinting factors (IFs) ranged from 2.0 to 4.4 with the exception of the MIP-QDs sensor for the detection of amoxicillin in egg, milk and honey samples which reached the value of 43 [ 26 ].…”

Section: Strategies For the Preparation Of Mip-qds Optical Sensorsmentioning

confidence: 99%

“…Thus, the utility of the proposed sensor for the measurement of IXC in real samples was demonstrated. Besides the advantages of this approach, such as low cost and facile preparation, the sensor could be reused without any appreciable loss of fluorescence quenching at least ten times following an adequate washing procedure [ 32 ].…”

Section: Selected Applicationsmentioning

confidence: 99%

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Molecularly Imprinted Polymer-Quantum Dot Materials in Optical Sensors: An Overview of Their Synthesis and Applications

Díaz‐Álvarez

Martín‐Esteban

2021

Biosensors

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In the last decades analytical methods have focused on the determination of target analytes at very low concentration levels. This has been accomplished through the use of traditional analytical methods that usually require high reagent consumption, expensive equipment and long pretreatment steps. Thus, there is a demand for simple, rapid, highly selective and user-friendly detection procedures. Quantum dots (QDs) are semiconductor fluorescent nanomaterials with unique optoelectronic properties that have shown great potential for the development of fluorescence probes. Besides, the combination of QDs with molecularly imprinted polymer (MIPs), synthetic materials with selective recognition, have been proposed as useful materials in the development of optical sensors. The resulting MIP-QDs optical sensors integrate the advantages of both techniques: the high sensitivity of QDs-based fluorescence sensors and the high selectivity of MIPs. This review gives a brief overview of the strategies for the synthesis of MIPs-QDs based optical sensors, highlighting the modifications in the synthesis procedure that improve the sensor performance. Finally, a revision of recent applications in sensing and bioimaging is presented.

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Perfluoro octanoic acid–modified magnetic hyperbranched polyamideamine as a sorbent for the extraction of fluorine‐containing pesticides from water samples

Meng

Liu

Fan

et al. 2021

J of Separation Science

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Perfluoro octanoic acid was modified on the surface of magnetic hyperbranched polyamideamine by acid amine condensation. The morphology and chemical composition of perfluoro octanoic acid-modified magnetic hyperbranched polyamideamine was characterized by transmission electron microscopy, Fourier transform infrared spectroscopy, zeta potential, particle size analysis, Brunauer-Emmett-Teller measurement, and X-ray photoelectron spectroscopy. Perfluoro octanoic acid-modified magnetic hyperbranched polyamideamine was applied in magnetic solid phase extraction for the separation and enrichment of four fluorine-containing pesticides (indoxacarb, metaflumizone, cyflumetofen, and cyhalothrin). The magnetic solid phase extraction method based on perfluoro octanoic acid-modified magnetic hyperbranched polyamideamine has low method detection limits (0.30-0.49 μg/L), a satisfactory coefficient of determination (0.9995-0.9999), wide linear ranges (2.5-250 μg/L), and good repeatability (intraday: 2.6-4.7%; interday: 1.1-7.9%). The enrichment factors and extraction efficiences varied from 55 to 76 and 69 to 96%, respectively. The sorbent-to-sorbent reproducibility was in the range of 3.2-7.6%, indicating that the synthesis of the sorbent was reliable. For the detection of actual water samples, the relative recoveries were in the range from 80.1 to 114.4% with relative standard deviations less than 9.6%. The calculation results of quantum chemistry calculations showed that after the modification of perfluoro octanoic acid, the interaction between the sorbent and four fluorine-containing pesticides was stronger.

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Development of an eco-friendly fluorescence nanosensor based on molecularly imprinted polymer on silica-carbon quantum dot for the rapid indoxacarb detection

Cited by 64 publications

References 32 publications

Molecularly Imprinted Silica-Coated CdTe Quantum Dots for Fluorometric Determination of Trace Chloramphenicol

Molecularly Imprinted Silica-Coated CdTe Quantum Dots for Fluorometric Determination of Trace Chloramphenicol

Molecularly Imprinted Polymer-Quantum Dot Materials in Optical Sensors: An Overview of Their Synthesis and Applications

Perfluoro octanoic acid–modified magnetic hyperbranched polyamideamine as a sorbent for the extraction of fluorine‐containing pesticides from water samples

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