Electrochemical oxidation of catechol at poly(indole-5-carboxylic acid) electrode

Bieguñki, A.; Frydrychewicz, A.; Osial, Magdalena; Jackowska, K.

doi:10.1134/s1023193510110108

Cited by 9 publications

(8 citation statements)

References 32 publications

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“…Also, two plots of E p 0 versus pH display the following slopes: −0.115 y – 0.111 V·pH –1 , respectively. Accordingly, they concluded that possibly two protons and one electron are involved in the oxidation and reduction of the conducting polymer . This demonstrates how pH and the supporting electrolyte can have an impact when the attempt is made to obtain a stable voltammetric response from these polyindoles, which could affect their electroactive response.…”

Section: Resultsmentioning

confidence: 98%

“…Accordingly, they concluded that possibly two protons and one electron are involved in the oxidation and reduction of the conducting polymer. 29 This demonstrates how pH and the supporting electrolyte can have an impact when the attempt is made to obtain a stable voltammetric response from these polyindoles, which could affect their electroactive response. It is for this reason that after obtaining 6-PICA, all of the subsequent steps to obtain the electrochemical device were carried out in NaAC−HAC buffer (pH Figure 1C shows that the 6-PICA film is compact and displays a nanowire structure with diameters of between 38 and 114 nm, interconnected a fibrous network.…”

Section: Resultsmentioning

confidence: 98%

“…The graphs of the redox potential E 1 0 , E 2 0 , and E 3 0 versus pH are linear with slopes of −0.098, −0.085, and −0.041V·pH –1 , respectively (Figure S2B). The slopes and their relations are complicated and cannot be described with a simple Nernst equation. , For comparison, a study of the electrochemical properties of the poly-indole-5-carboxylic (5-PICA) was performed by Bieguñki et al It was shown that 5-PICA is electroactive in aqueous solutions showing two redox processes in the acidic solution and one redox process in solutions with pH > 4.0. Also, two plots of E p 0 versus pH display the following slopes: −0.115 y – 0.111 V·pH –1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

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Electrochemical Immunosensing Platform for the Determination of the 20S Proteasome Using an Aminophenylboronic/Poly-indole-6-carboxylic Acid-Modified Electrode

Martínez-Rojas

Diculescu

Armijo

2020

ACS Appl. Bio Mater.

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The first electrochemical immunosensor for the determination of the 20S proteasome (P20S) was developed, entailing the immobilization of an antibody on an aminophenylboronic/poly-indole-6carboxylic acid-modified electrode. The proposed electrochemical bioplatform is a simple and feasible analytical tool applicable for the determination of P20S in human plasma, considering its high clinical and biological relevance. Cyclic voltammetry, electrochemical impedance spectroscopy, and square wave voltammetry (SWV) were used to determine the optimal step-by-step process to obtain the electrochemical immunosensor. The interaction of P20S with the recognition layer of the immobilized antibody on the nanostructured surface took place by incubating the electrode in a P20S solution at 20 °C for 2 h. Using SWV as an electro-analytical technique, this immunosensor can quantify P20S. The current was linear with the P20S concentration within two dynamic concentration ranges from 20.0 to 80.0 and 80.0 to 200.0 ng•mL −1 (r 2 = 0.992 and 0.98, respectively) with a limit of detection and quantification of 6 and 18 ng•mL −1 , respectively. Moreover, the immunosensor showed considerable repeatability and reproducibility, when the determination was done in human serum, which confirms that it is a promising alternative for direct detection of P20S in biological fluids with minimal interference.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

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Electrochemical Immunosensing Platform for the Determination of the 20S Proteasome Using an Aminophenylboronic/Poly-indole-6-carboxylic Acid-Modified Electrode

Martínez-Rojas

Diculescu

Armijo

2020

ACS Appl. Bio Mater.

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“…Indole is ubiquitous in biological and biochemical structures and widely used in the construction of pharmaceuticals, fragrances, agrochemicals, dyes and materials due to its unique conjugate structure and photoelectric properties . In the last several years, polyindole and its derivatives with particular optical and electroactive properties have received significant attention for applications in various fields, such as electronics, electrocatalysis, anode materials in batteries, anticorrosion coatings, anti‐fouling systems etc . However, examples illustrating the polyindoles as fluorescent sensors are relatively few so far …”

Section: Introductionmentioning

confidence: 99%

High performance poly(N‐aryleneindole ether) containing pyridine units as a novel acid response fluorescent detector

Wang

Zhu

et al. 2016

Polymer International

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A novel high-performance polyindole containing a pyridine ring (P1) was successfully prepared by the catalyst-free nucleophilic substitution polycondensation of 4-hydroxyindole with 2,6-difluoropyridine via a C − N and C − O coupling reaction process. This semirigid polyindole P1 exhibits good thermal stability, and it can be dissolved well in common organic solvents. Fluorescent spectral studies indicate that the resulting polymer shows blue-light emission at 402 nm due to the effect of intramolecular charge transfer caused by the donor − acceptor interaction between its indole and pyridine units. Moreover, the fluorescence intensity of P1 could be altered by protonation and deprotonation. Such behaviour enables it to be utilized as one kind of acid response fluorescent polymer sensor.

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“…24 Electro-oxidation of aromatic compounds on metal and metal oxide surfaces has found important applications in a variety of application fields ranging from electro-synthesis, electro-analysis, wastewater treatment to sensor technology. [25][26][27][28][29][30][31][32][33][34][35] Among many kinds of electrodes, platinum (Pt) and gold (Au) bulk electrodes are most frequently used. However, significant dependence of electrochemical kinetics and mechanisms on different orientations of adsorbed molecules is one of the main disadvantages of bulk Pt electrodes.…”

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confidence: 99%

Electrochemical Behavior of Aromatic Compounds on Nanoporous Gold Electrode

Quynh¹,

Byun²,

Kim³

2018

J. Electrochem. Soc.

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This study aimed at investigating the electrochemical behavior of benzene and its substituted derivatives on nanoporous gold and assessing the possibility of utilizing this electrode as a platform for simultaneous detection of different aromatic compounds. Cyclic voltammetric studies were performed with benzene, hydroquinone, catechol, phenol, 2-aminophenol, 2-chlorophenol as well as their mixtures on the nanoporous gold prepared from dealloying of Au x Si 1-x films. The nanoporous structure was found to provide enhanced electro-oxidation of hydroquinone, catechol, phenol, 2-aminophenol and 2-chlorophenol and remarkable fouling resistance in the electro-oxidation of phenol and 2-aminophenol compared to the compact and flat gold electrode. Interestingly, oxidation potentials of these aromatics appear to be affected significantly by the attachment of functional groups to the benzene ring. Based on the onset oxidation potentials, the easiness of oxidation at nanoporous gold was found to follow the order: hydroquinone > catechol > 2-aminophenol > 2-chlorophenol, phenol > benzene. Moreover, nanoporous gold was found to be advantageous over nanoporous platinum for potential application in simultaneous analysis employing voltammetric techniques as it could offer discernable peak potential separation in the electro-oxidation of the different aromatics.

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Electrochemical oxidation of catechol at poly(indole-5-carboxylic acid) electrode

Cited by 9 publications

References 32 publications

Electrochemical Immunosensing Platform for the Determination of the 20S Proteasome Using an Aminophenylboronic/Poly-indole-6-carboxylic Acid-Modified Electrode

Electrochemical Immunosensing Platform for the Determination of the 20S Proteasome Using an Aminophenylboronic/Poly-indole-6-carboxylic Acid-Modified Electrode

High performance poly(N‐aryleneindole ether) containing pyridine units as a novel acid response fluorescent detector

Electrochemical Behavior of Aromatic Compounds on Nanoporous Gold Electrode

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