Electrochemical relaxation study of polythiophene as conducting polymer (I)

Abou‐Elenien, G. M.; El‐Maghraby, A. A.; El-Abdallah, G.M.

doi:10.1016/j.synthmet.2004.04.020

Cited by 33 publications

(32 citation statements)

References 26 publications

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“…Electropolymerisation of EDOT from a solution containing 0.01 M monomer was carried out in three different ways -potential cycling, potentiostatically and galvanostatically -in two plays an important role in both electron transfer rate and in diffusion processes, having a significant effect on the electropolymerisation process and on the properties of the polymer films obtained [27]. Before using the carbon film electrodes, they were subjected to electrochemical pre-treatment by cycling the potential as described in the experimental section.…”

Section: Electrode Modification By Edot Polymerisationmentioning

confidence: 99%

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Preparation and characterisation of poly(3,4-ethylenedioxythiophene) and poly(3,4-ethylenedioxythiophene)/poly(neutral red) modified carbon film electrodes, and application as sensors for hydrogen peroxide

Gonçalves

Ghica

Brett

2011

Electrochimica Acta

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Please cite this article as: A.R. Gonçalves, M.E. Ghica, C.M.A. Brett, Preparation and characterisation of poly (3,4-ethylenedioxythiophene) and poly(3,4-ethylenedioxythiophene)/poly(neutral red) modified carbon film electrodes; and application as sensors for hydrogen peroxide, Electrochimica Acta (2010Acta ( ), doi:10.1016Acta ( /j.electacta.2010 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. carbon-film electrodes (CFE) in aqueous solution using electropolymerisation by potential cycling, potentiostatically and galavanostatically. Characterisation of the modified electrodes was done by cyclic voltammetry and electrochemical impedance spectroscopy and the stability of the polymer films was probed. The coated electrodes were tested for application as hydrogen peroxide sensors, by oxidation and reduction. A novel polymer film was also formed by modification of CFE by co-electropolymerisation of EDOT and the phenazine dye neutral red (NR) -(PEDOT/PNR) with a view to enhancing the properties for sensor applications. It was found that hydrogen peroxide reduction at the PEDOT/PNR coated electrodes could be carried out at a less negative potential, the sensor performance comparing very favourably with that of other polymer-modified electrodes reported in the literature.

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Section: Electrode Modification By Edot Polymerisationmentioning

confidence: 99%

“…Different curve profiles can be related to different polymerisation mechanisms, where a nucleation and growth mechanism are identified by an initial current spike, a falling current to a steady value and a final increase to a plateau characteristic of application of a constant potential [27].…”

Section: Electrode Modification By Edot Polymerisationmentioning

confidence: 99%

Preparation and characterisation of poly(3,4-ethylenedioxythiophene) and poly(3,4-ethylenedioxythiophene)/poly(neutral red) modified carbon film electrodes, and application as sensors for hydrogen peroxide

Gonçalves

Ghica

Brett

2011

Electrochimica Acta

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“…15,16,20 The electrochemical properties of polythiophene films largely depend on the supporting electrolyte, especially on the type of anion. [22][23][24][25] According to Wu and Pawliszyn, 26 the use of different electrolytes enables manipulation of the functionality of the resulting polymers. Therefore, two electrolyte solutions (namely TBATFB and NaClO 4 ) in acetonitrile were evaluated for the electrodeposition of polythiophene in order to increase the selectivity and efficiency of the extraction phase.…”

Section: Electropolymerization Processmentioning

confidence: 99%

Evaluation of solid-phase microextraction using a polythiophene film and liquid chromatography with spectrophotometric detection for the determination of antidepressants in plasma samples

Caris¹,

Chaves²,

Queiroz³

2012

J. Braz. Chem. Soc.

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A fase extratora de politiofeno (PTh), desenvolvida por eletropolimerização em haste de aço inox, foi avaliada para microextração em fase sólida (SPME) e análise por cromatografia líquida com detecção espectrofotométrica (LC-UV) de antidepressivos inibidores seletivos da recaptação de serotonina (citalopram, paroxetina, fluoxetina e sertralina) em amostras de plasma. A influência das variáveis da eletropolimerização (velocidade de varredura de potencial, potencial e ciclos de varredura) foi avaliada no desempenho SPME. As variáveis SPME (tempo de extração, temperatura, pH da matriz, força iônica e procedimento de dessorção), assim como a influência das proteínas do plasma no mecanismo de sorção, foram também avaliadas. O método SPME-PTh/LC-UV desenvolvido para a determinação de antidepressivos em amostras de plasma apresentou faixa linear de resposta do limite de quantificação (LOQ, 200-250 ng mL -1 ) a 4000 ng mL -1 e precisão interensaio com coeficiente de variação no intervalo de 11 a 15%. O método proposto poderá ser utilizado para a determinação de antidepressivos em amostras de plasma humano para análises toxicológicas de urgência, após a ingestão acidental ou suicida de doses altas de medicamentos.Polythiophene (PTh) phase electropolymerized on the stainless steel wire was evaluated as solidphase microextraction (SPME), and analysis by liquid chromatography with spectrophotometric detection (LC-UV) for determination of new-generation antidepressants, selective serotonin reuptake inhibitors (SSRIs) (citalopram, paroxetine, fluoxetine and sertraline), in plasma samples. The influence of electropolymerization variables (scan rate, potential range and scan cycles) was evaluated on SPME performance. The SPME variables (extraction time, temperature, matrix pH, ionic strength and desorption procedure), as well as the influence of plasma proteins on sorption mechanisms were also evaluated. The SPME/LC-UV method developed for determination of antidepressants in plasma sample presented a linear range between the limit of quantification (LOQ, 200-250 ng mL -1 ) to 4000 ng mL -1 , and interday precision with coefficient of variation (CV) ranged from 11 to 15%. The proposed method can be a useful tool for the determination of antidepressants in human plasma samples in urgent toxicological analysis after the accidental or suicidal intake of higher doses of medications.

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“…The discovery of electrical conductivity of organic conjugated polymers has opened a novel and very important field of modern functional material science. The heterocyclic polymers, such as polypyrrole and polythiophene, have also received a great deal of interest due to their high conductivity in the doped state accompanied by a much higher stability in air [9][10][11][12][13]. However, polyfuran has attracted relatively less attention because the polyfuran with a regular structure and high conductivity was synthesized with difficulty.…”

Section: Introductionmentioning

confidence: 99%

“…UV spectra were obtained by an OPTIZEN 2120 UV-Vis spectrometer using the dichloromethane solution of polymers with a concentration of 0, 00125 mg/mL. 1 H-nuclear magnetic resonance (NMR), 13 C NMR measurements were carried out on a 300 MHz Bruker NMR Spectrometer equipped with a probe BB05 mm, in CDCl 3 . Tetramethylsilane (TMS) was used as the internal standard in these cases.…”

Section: Introductionmentioning

confidence: 99%

A Novel Poly{(2,5-diyl furan) (benzylidene)}: A New Synthetic Approach and Electronic Properties

Belmokhtar

Yahiaoui

Hachemaoui

et al. 2012

ISRN Physical Chemistry

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A new conjugated aromatic poly[(furan-2, 5-diyl)-co-(benzylidene)] has been prepared by polycondensation of benzaldehyde and furan catalyzed by Maghnite-H + . Maghnite-H + is a montmorillonite sheet silicate clay, which exchanged with protons. These polymers can be dissolved in high polar solvents such as DMSO, DMF, THF, or CHCl 3 A kind of band-gap conjugated poly[(furan-2, 5-diyl)-co-(benzylidene)] has been synthesized by a simple method and characterized by 1 HNMR, 13 CNMR, FT-IR, and UV-Vis. The result reveals that the band-gap of the PFB conjugated polymer has an optical band gap of 2.2 eV.

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Electrochemical relaxation study of polythiophene as conducting polymer (I)

Cited by 33 publications

References 26 publications

Preparation and characterisation of poly(3,4-ethylenedioxythiophene) and poly(3,4-ethylenedioxythiophene)/poly(neutral red) modified carbon film electrodes, and application as sensors for hydrogen peroxide

Preparation and characterisation of poly(3,4-ethylenedioxythiophene) and poly(3,4-ethylenedioxythiophene)/poly(neutral red) modified carbon film electrodes, and application as sensors for hydrogen peroxide

Evaluation of solid-phase microextraction using a polythiophene film and liquid chromatography with spectrophotometric detection for the determination of antidepressants in plasma samples

A Novel Poly{(2,5-diyl furan) (benzylidene)}: A New Synthetic Approach and Electronic Properties

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