Electrochemical sensor based on molecularly imprinted poly(ortho-phenylenediamine) for determination of hexahydrofarnesol in aviation biokerosene

Buffon, Edervaldo; Stradiotto, Nelson Ramos

doi:10.1016/j.snb.2019.02.059

Cited by 40 publications

(23 citation statements)

References 32 publications

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“…Figure 1 (Curve a) shows the electrooxidation of o-PD in ABS (at pH 5.0) by CV; one can observe the presence of two irreversible anodic peaks at 0.45 and 0.70 V (vs. Ag j AgCl), attributed to the dimer state of o-PD, which is a univalent cationic radical, and the oxidation of dimer into a divalent cationic radical, which is responsible for the initiation of the electropolymerization process, as reported in the literature [32]. The successive cycles showed a decrease in peak currents, suggesting the formation of a non-electroactive film on the GCE surface; this film was attributed to NIP (also see Figure S1).…”

Section: Molecular Imprinted Polymer (Mip) Films On Gcesupporting

confidence: 73%

“…Many studies related to MIP electropolymerization [32,[36][37][38][39][40] show that the template molecule does not interfere in this process; this means that the interference of 1-Nph needs to be investigated in terms of its proportion relative to the functional molecules. The interference of 1-Nph affects the formation of cavities because of the presence of oxidized and non-oxidized 1-Nph during the imprinting process.…”

Section: Molecular Imprinted Polymer (Mip) Films On Gcementioning

confidence: 99%

“…The coating of the electrode with polymeric film has become more widely used in the field compared to chemical techniques; the film thickness can be controlled by electropolymerization using voltammetric or amperometric techniques [28]. Specifically, the use of o-phenylenediamine (o-PD) for the construction of compact (rigid), continuous and thin polymer film on GCE has become well established in the literature [29][30][31][32]. This polymer also offers hydrophilic sites on the electrode surface, which may improve the detection of analytes, such as 1-Nph, in complex matrices.…”

Section: Introductionmentioning

confidence: 99%

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Using an Electrochemical MIP Sensor for Selective Determination of 1‐Naphthol in Oilfield Produced Water

2021

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A molecularly imprinted polymer (MIP) sensor was successfully constructed on glassy carbon electrode for the determination of 1‐naphthol (1‐Nph). The sensor was constructed by electropolymerization on bare GCE in the presence of the target molecule. The recognition of 1‐Nph was conducted indirectly using [Fe(CN)6]3−/4− as redox probe. The MIP sensor presented wide linear working range and limit of detection of 1.5×10−9 mol L−1. The MIP sensor was applied for the determination of 1‐Nph in oilfield produced water. The results obtained showed good selectivity and sensitivity of the proposed sensor in terms of 1‐Nph quantification.

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Section: Molecular Imprinted Polymer (Mip) Films On Gcesupporting

confidence: 73%

Section: Molecular Imprinted Polymer (Mip) Films On Gcementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Using an Electrochemical MIP Sensor for Selective Determination of 1‐Naphthol in Oilfield Produced Water

2021

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“…The above variations are close to the previously reported values. 29,42,43 Additionally, the proposed sensors were successfully and directly used in rat whole blood, which did not require dilution prior to analysis, but negligible pH change upon global cerebral ischemia for 60 min by the present developed sensor (Figure S25, Supporting Information). Further work on changing intracellular dynamic pH changes is in progress in our lab.…”

Section: ■ Experimental Sectionmentioning

confidence: 94%

Novel Self-Calibrating Amperometric and Ratiometric Electrochemical Nanotip Microsensor for pH Measurement in Rat Brain

et al. 2021

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Brain pH has been proven to be a key factor in maintaining normal brain function. The relationship between local pH fluctuation and brain disease has not been extensively studied due to lack of the accurate in situ analysis technology. Herein, we have for the first time proposed a voltammetric pH sensor by measuring the ratio of current signals instead of the previously reported potential based on the Nernst equation. Single-walled carbon nanotubes (CNT) were first self-assembled on the electrode surface of a carbon-fiber nanotip electrode (CFNE). Then, poly-o-phenylenediamine (PoPD) molecules were deposited as pH-responsive molecules through in situ electrochemical polymerization. The compact CFNE/CNT/PoPD exhibited a good redox process with the on−off−on ratiometric electrochemical response to pH ranging from 4.5 to 8.2, providing self-correction for in situ pH detection. Thus, the proposed sensor enabled the accurate measurement of pH with excellent selectivity even in the presence of proteins or electroactive species. In addition, the sensor showed high repeatability, reproducibility, and reversibility in measuring pH and even demonstrated good stability when it was exposed to air for 5 months. Finally, we successfully detected the fluctuation of pH in rat brains with cerebral ischemia and rat whole blood. Overall, this research not only provides a good tool for the detection of rat brain pH but also provides a new strategy for further designing nanosensors for intracellular or subcellular pH.

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“…53 A Figura Os dados do Quadro 1 indicam uma diversidade de materiais modificantes como modificantes orgânicos (polímeros, enzimas, etc. ), 65,69 inorgânicos (óxidos, metálicos, íons complexos, etc. ), 49,52 organometálicos 16,54 e nanomateriais.…”

Section: Eletrodos Quimicamente Modificados (Eqm)unclassified

Electrochemistry: Modified Electrodes and their Potentialities

Monteiro¹,

Júnior²,

Sussuchi³

2020

Rev. Virtual Quim.

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Electrochemical sensors are analytical tools that offer great portability, ease automation, miniaturization capability, and low cost compared to other analytical techniques and methods. For those reasons, there is a growing search for these electrodes to obtain better analysis conditions. This advance is reflected in new patents and articles, which were intensified mainly with the arising of chemically modified electrodes and self-sufficient equipment. Besides, this study brings together and discusses the main aspects of electrochemical methods, the development of electrodes and their modifiers, as well as the perspectives for these electroanalytical tools. Os sensores eletroquímicos são ferramentas de análise que oferecem maior portabilidade, facilidade de automação, capacidade de miniaturização e baixo custo em relação a outras técnicas e métodos analíticos. Por essas razões, existe uma crescente busca pelo desenvolvimento desses eletrodos a fim de se obter melhores condições de análise. Esse avanço reflete em novas patentes e artigos que se intensificaram, principalmente com o surgimento dos eletrodos quimicamente modificados e equipamentos autossuficientes. Em suma, esse estudo reúne e discute aspectos fundamentais concernentes aos métodos eletroquímicos, o avanço no desenvolvimento dos eletrodos e seus modificantes, além das perspectivas para essas ferramentas eletroanalíticas.

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Electrochemical sensor based on molecularly imprinted poly(ortho-phenylenediamine) for determination of hexahydrofarnesol in aviation biokerosene

Cited by 40 publications

References 32 publications

Using an Electrochemical MIP Sensor for Selective Determination of 1‐Naphthol in Oilfield Produced Water

Using an Electrochemical MIP Sensor for Selective Determination of 1‐Naphthol in Oilfield Produced Water

Novel Self-Calibrating Amperometric and Ratiometric Electrochemical Nanotip Microsensor for pH Measurement in Rat Brain

Electrochemistry: Modified Electrodes and their Potentialities

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