INTAKE OF COPPER PARTICLES IN POLY(o-PHENYLENEDIAMINE-co-p-BENZOQUINONE) DEPOSITED ONTO PLATINUM ELECTRODE: RESPONSE TO gamma-AMINOBUTIRIC ACID

Alfonso, Geraldo; Valle, M.; Borrego, Euddy; Soto, G.; Bodini, Mario E.

doi:10.4067/s0717-97072004000200015

Cited by 4 publications

(4 citation statements)

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“…sensors, batteries, fuel cells, photocells, light emitting diodes, etc. makes these materials one of the most studied topics at present [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] . Among these polymers polyaniline, polypyrrole, polythiophene and its derivatives stand out.…”

Section: Introductionmentioning

confidence: 99%

DESIGN AND EVALUATION OF A Hg(II) SENSOR BASED ON THE RESPONSE OF A POLY(3,4-ETHYLENEDIOXYTHIOPHENE) MODIFIED ELECTRODE

Valle

Llanquileo

Díaz

et al. 2014

J. Chil. Chem. Soc.

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The electro-synthesis of poly (3,4-ethylenedioxythiophene), PEDOT, has been widely studied due to its different and important applications. Considering that one of the most important electrochemical characteristics of this polymer is its ability to undergo p-and n-doping/undoping, our research group has tested its potential usefulness for cations extraction based on the n-doping/undoping process, hitherto almost unexplored. Therefore, in a first stage, EDOT was electropolymerized on AISI 316 stainless steel, SS, and the SS|PEDOT modified electrode was then obtained. Applying the n-doping potential to these SS|PEDOT electrodes immersed in Hg(II) solution at physiological pH (PBS) it was verified that the cation was incorporated into the polymeric matrix and, depending on the area of the working electrode and removal method (n-doping/undoping), its quantitative extraction was possible. It was also found that the charge recorded during the process is proportional to Hg(II) concentration, hence the assembly is now proposed as sensor for this cation. To this end, in the current paper the amperometric response of the SS|PEDOT electrode toward Hg(II) in PBS, prepared under the optimum conditions previously established and described, was studied. First of all, it is noteworthy establishing that the response obtained with a freshly prepared SS|PEDOT electrode prior to each measurement is highly reproducible. Having this in mind, the modified electrode can be thought as a sensor that may be utilized as a disposable device. Once the electrode response was optimized, analytical parameters were established, namely linear response between 66.6 µmol·L -1 -1.0 mmol·L -1 Hg(II), 1s response time, and quantification and detection limit 10 and 15 µmol·L -1 , respectively. It is possible thus to have at our disposal a suitable and inexpensive sensor that would enable quick and economical quantification of this toxic element using electrochemical methods.

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Section: Introductionmentioning

confidence: 99%

DESIGN AND EVALUATION OF A Hg(II) SENSOR BASED ON THE RESPONSE OF A POLY(3,4-ETHYLENEDIOXYTHIOPHENE) MODIFIED ELECTRODE

Valle

Llanquileo

Díaz

et al. 2014

J. Chil. Chem. Soc.

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“…benzoquinone) can help solve this problem. In this case quinone groups were found to keep metal ions bound within the polymer in such a way that the catalytically active particles could be regenerated by reduction after each measurement [11]. A step ahead within this strategy is that the polymer chain itself is composed of monomeric units with the ability to complex copper ions.…”

Section: Introductionmentioning

confidence: 99%

“…Conducting-polymer modified electrodes are known to possess intrinsic catalytic activity for the redox transformation of a number of organic and inorganic species [4][5][6][7][8]. Also, polymer thin films can be used as an organic matrix to host active metal particles in order to develop new hybrid materials with enhanced electrocatalytic properties [4,[9][10][11][12]. In these metal-polymer composites, the conducting organic matrix allows electrons to be shuttled between the electrode surface and the dispersed active metal sites.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical synthesis and characterization of poly(2,2’-dithiodianiline) thin films loaded with copper microparticles. Application to the amperometric analysis of γ-aminobutyric acid

et al. 2005

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SummaryModified electrodes with poly(2,2'-dithiodianiline),PDTDA, were prepared from the corresponding monomer by cyclic voltammetry between 0.0 V and 1.5-1.6 V on gold or stainless steel respectively. The potentiodynamic method proved to bring about good quality and adherent thin films. The wide potential window shown by this modified electrode allowed attempting the insertion of copper in the polymeric matrix using several strategies. The response of this modified electrode copper was checked in the presence of γ-aminobutyric acid (GABA). Copper loaded on PDTDA/Au electrodes showed the highest sensitivity along with a stable and reproducible response for the detection of GABA. The surface morphology and composition analysis by SEM and XPS shows that copper is deposited in the polymeric matrix as uniformly scattered microparticles. The surface of these particles is mainly composed of Cu(I) species.

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“…Among these, the use of electrochemical methods is interesting because of its low cost, portability, high sensitivity, being these desirable characteristics for the electrochemical detection of GSH and/or GSSG. Therefore, now is in this discipline where major efforts are made in this respect and, particularly, the modified electrode with electrochemical methods for the determination of substrates have received increasing attention in recent years due to its simplicity, low cost, high detectability and easy miniaturization [12][13][14][15][16][17][18] .…”

Section: Introductionmentioning

confidence: 99%

Inclusion of Glutathione Peroxidase on Polypyrrole Modified Electrode, to Be Assayed as Glutathione Sensor

Valle

Chen

Alarcón³

et al. 2013

J. Chil. Chem. Soc.

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In this work it was obtained a modified electrode by inclusion of the enzyme glutathione peroxidase (GPx) on a conductive polymer, polypyrrole (PPy), deposited on a graphite electrode (GC|PPy,GPx) for the amperometric detection of reduced glutathione (GSH) in presence of hydrogen peroxide. Also, working conditions were optimized in order to prepare the electrode GC|PPy,GPx, which were tested for different concentrations of monomer and enzyme, electrochemical type of perturbance (by fixed potential or cyclic voltammetry) deposition potential and time (PPy film thickness, GPx), etc. by testing the response of the electrodes versus GSH in presence of hydrogen peroxide at physiological pH and temperature. At optimal experimental conditions, the achieved electrode gives a characteristic response for the analyte, which means that this modified electrode can be proposed as a selective GSH sensor, since it was shown that the enzyme maintains its activity during experimental manipulations and responds in a highly reproducible mode, so its use is proposed as an amperometric biosensor which is highly selective and stable.

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INTAKE OF COPPER PARTICLES IN POLY(o-PHENYLENEDIAMINE-co-p-BENZOQUINONE) DEPOSITED ONTO PLATINUM ELECTRODE: RESPONSE TO gamma-AMINOBUTIRIC ACID

Cited by 4 publications

References 0 publications

DESIGN AND EVALUATION OF A Hg(II) SENSOR BASED ON THE RESPONSE OF A POLY(3,4-ETHYLENEDIOXYTHIOPHENE) MODIFIED ELECTRODE

DESIGN AND EVALUATION OF A Hg(II) SENSOR BASED ON THE RESPONSE OF A POLY(3,4-ETHYLENEDIOXYTHIOPHENE) MODIFIED ELECTRODE

Electrochemical synthesis and characterization of poly(2,2’-dithiodianiline) thin films loaded with copper microparticles. Application to the amperometric analysis of γ-aminobutyric acid

Inclusion of Glutathione Peroxidase on Polypyrrole Modified Electrode, to Be Assayed as Glutathione Sensor

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