Square wave voltammetry at disc microelectrodes for characterization of two electron redox processes

Novel ECPs (electronic conducting polymers) based on amino β-styryl-substituted terthiophene (AST) were synthetized by direct electropolymerization. The ECPs were characterized by cyclic voltammetry, square-wave voltammetry, Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The poly(amino β-styryl terthiophene) displayed cyclic and square-wave voltammograms with redox peaks that can be assigned to the aminophenyl moiety and the polyterthiophene backbone. The presence of free primary amine groups on the ECP film permitted further biological functionalization (i.e., covalent bonding of various bioreceptors on its surface). The electrochemical performance of Biotin grafted at the AST modified glassy carbon electrode was investigated to detect the Avidin protein in solution by cyclic voltammetry and square-wave voltammetry.Key words: electronic conducting polymer, electrode surface modification, biosensor, β-styryl-substitued terthiophene, functionalization, cyclic, square-wave voltammetry.

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Conditioning of renewable silver amalgam film electrode for the characterization of clothianidin and its determination in selected samples by adsorptive square-wave voltammetry

Talanta ◽

10.1016/j.talanta.2013.08.048 ◽

2013 ◽

Vol 117 ◽

pp. 242-249 ◽

Cited By ~ 28

Author(s):

Mariola Brycht ◽

Sławomira Skrzypek ◽

Valéria Guzsvány ◽

Janoš Berenji

Keyword(s):

Square Wave Voltammetry ◽

Film Electrode ◽

Square Wave ◽

Wave Voltammetry ◽

Silver Amalgam

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Determination of hydroquinone in a square wave voltammetry procedure using a graphite-polyurethane composite electrode

Eclética Química ◽

10.1590/s0100-46702006000400009 ◽

2006 ◽

Vol 31 (4) ◽

pp. 59-62 ◽

Cited By ~ 3

Author(s):

P. Cervini ◽

E.T.G. Cavalheiro

Keyword(s):

Confidence Level ◽

Square Wave Voltammetry ◽

Composite Electrode ◽

Limit Of Detection ◽

Voltammetric Sensor ◽

Square Wave ◽

Polyurethane Composite ◽

Wave Voltammetry

In order to a better characterization of a graphite-polyurethane composite intended to be used as a voltammetric sensor, the performance in a square wave voltammetric procedure was investigated. Using hydroquinone (HQ) as a probe, the electrode showed to be useful in square wave voltammetry with limit of detection of 0.28 µmol L-1, with recoveries between 99.1 and 101.5%. The results of the proposed method agreed with HPLC ones within 95% confidence level.

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Synthesis, electrochemical and spectroelectrochemical studies of octaphenylthio-substituted phthalocyanines

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424605000605 ◽

2005 ◽

Vol 09 (07) ◽

pp. 484-490 ◽

Cited By ~ 29

Author(s):

Fungisai Matemadombo ◽

M. David Maree ◽

Kenneth I. Ozoemena ◽

Philippe Westbroek ◽

Tebello Nyokong

Keyword(s):

Cyclic Voltammetry ◽

Square Wave Voltammetry ◽

Redox Processes ◽

Tetrabutylammonium Perchlorate ◽

Square Wave ◽

Wave Voltammetry

Cobalt (4) and iron (5) phenylthio-substituted phthalocyanines ( MPc ( SR )8) have been synthesized and characterized. Cyclic square wave voltammetry in dimethylformamide containing tetrabutylammonium perchlorate revealed five and six redox processes, respectively, for complexes 4 and 5. The complexes are easier to reduce compared to the corresponding unsubstituted MPc and to butylthio substituted derivatives. The first oxidation and reduction occurs on the metal for both complexes. Spectroelectrochemistry (in dimethylformamide containing tetrabutylammonium perchlorate) was employed to assign the cyclic voltammetry peaks, and gave spectra characteristic of Fe I Pc for reduction of 5 and Co I Pc for the reduction of 4. The spectrum of the former is particularly of importance since such species have not received much attention in the literature.

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