PARA-Ni-TETRAAMINOPHENYLPORPHYRIN/Co-COBALTITE/SnO2:F MODIFIED ELECTRODES: ELECTROCATALYTIC BEHAVIOR TOWARD THE OXIDATION OF HIDRAZINE

Bravo, Paz; Isaacs, Fabiola; Ramı́rez, Galo; Armijo, Francisco; Isaacs, Mauricio; Aguirre, Marı́a J.; Zamora, Claudia; Trollund, E.

doi:10.4067/s0717-97072005000400006

Cited by 5 publications

(4 citation statements)

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“…However, application of this material to elaborate novel electrodes to be utilized in the electrochemical field 35−39 is still necessary. In this respect fluorine-doped tin oxide (SnO 2 : F) has been employed for the obtention of poly(tetraaminophenyl)porphyrins modified electrodes that have been used in aqueous electro-catalytic applications for hydrazine 40 , nitrite 41 , and nitrate 42 . Consequently, among the many available substrates usually employed for the electrosynthesis of conductive polymers (see above ref.…”

Section: Introductionmentioning

confidence: 99%

Poly-0-Aminophenol Obtained at High Potentials by Cyclic Voltammetry on Sn0(2): F Electrodes: Application in Quantitative Determination of Ascorbic Acid

Armijo

Canales

Río

et al. 2009

J. Chil. Chem. Soc.

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In the present work the obtention of poly-o-aminophenol (POAP) at high potentials on conducting glass (SnO 2 : F) is reported. The synthesis was carried out by continuous potential cycling in a 1×10 -3 M o-aminophenol (OAP), 0.1 M hydrochloric acid, and 0.1 M potassium chloride solution between -0.2 and 1.5 V at 0.05 V·s -1 vs Ag│AgCl. The polymer growth was followed by cyclic voltammetry, UV-vis spectra, and AFM characterization. The SnO 2 : F modified electrode (SnO 2 : F/POAP) was tested in the electro-oxidation of ascorbic acid (AA) in phosphate buffer solution. This coating showed an important electrocatalytic effect because a negative anodic shift of 0.4 V with respect to a bare SnO 2 : F glass electrode was observed.

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Section: Introductionmentioning

confidence: 99%

Poly-0-Aminophenol Obtained at High Potentials by Cyclic Voltammetry on Sn0(2): F Electrodes: Application in Quantitative Determination of Ascorbic Acid

Armijo

Canales

Río

et al. 2009

J. Chil. Chem. Soc.

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“…Electrochemical techniques such as in situ FTIR spectroscopy [14][15][16], Raman resonance spectroscopy [17], and other methods, have been used to study the electropolymerization mechanism, to characterize the polymer film and to discover different applications of polyOPD [18]. Also, it is possible to polymerize porphyrins of different transition metals [19][20][21], one of them being Co(II)-tetrakis(para-aminophenyl)porphyrin [22][23][24][25][26][27][28][29] on different electrodic surfaces. This polymer shows electrocatalytic activity on several interesting redox reactions [22][23][24][25][26][27][28][29] such as sulfite oxidation.…”

Section: Introductionmentioning

confidence: 99%

Sulfite Oxidation Mediated by Ortho-Phenylenediamine / Co(ii)-Tetrakis(para-Aminophenyl)porphyrin Copolymers in Acid Medium

Arce

Márquez

Herrera

et al. 2013

J. Chil. Chem. Soc.

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The aim of this work is to study the sulfite oxidation mediated by glassy carbon electrodes modified with copolymers formed by ortho-phenylenediamine (OPD) and Co(II)-tetrakis(para-aminophenyl)porphyrin (CoTAPP). The copolymer was obtained through continuous cycling of potential of a glassy carbon electrode in acid medium containing each respective homopolymer in 1:1 feeding volume, in which the ortho-phenylenediamine concentration was 1·10 -1 M and the CoTAPP concentration was 1·10 -4 M. The film obtained is thin, stable and contains a low amount of porphyrin in comparison to the amount in orthophenylenediamine. Its electrocatalytic activity was tested toward the sulfite oxidation. In this case, this film is more electrocatalytic than the modified electrode modified with the CoTAPP electropolymer, even though ortho-phenylenediamine is inactive in this reaction. In this work the electrocatalysis process, the morphology of the film, and the difference of electrocatalytic behavior between the ortho-phenylenediamine and cobalt porphyrin homopolymers and the orthophenylenediamine-porphyrin copolymer were studied. The morphologic studies were done using Au electrodes since the electrocatalytic activity on Au and on glassy carbon are quite similar.

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“…SnO 2 has also been widely studied as electrode material because fulfils almost all the above requirements, that is why it has been used to prepare modified electrodes such as: polyaniline/ruthenium complexes for detection of dopamine 44, poly‐tetraaminophenylporphyrins for nitrate reduction and hydrazine oxidation 45, 46, poly‐ o ‐ aminophenol for ascorbic acid detection 47, Prussian blue thin film for L‐cysteine detection 48. Recently, SnO 2 has been utilized to prepare electrodes modified with different enzymes 49, 50 and conductive polymers 51.…”

Section: Introductionmentioning

confidence: 99%

Captopril Electrochemical Oxidation on Fluorine‐Doped SnO₂ Electrodes and Their Determination in Pharmaceutical Preparations

et al. 2010

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A novel application of fluorine-doped tin oxide (FTO) electrodes is reported in the present work. To this end, the captopril electrochemical oxidation mechanism on FTO electrodes at various pH and its determination in pharmaceutical preparations was investigated. Captopril oxidation on FTO proceeds at pH between 2.0 and 4.0. The study revealed that interferences for captopril determination in pharmaceutical samples was totally suppressed using these electrode materials. Voltammetric survey showed an anodic peak at about 0.375 V (Ag j AgCl) for captopril oxidation, that takes place through an EC process at pH interval 2.0-4.0. The investigation demonstrated that captopril oxidation occurs through protonated species and these electroactive species interact by adsorption on FTO electrodes, with a large heterogeneous rate constant and a mechanism involving 1H + /1e À in the global reaction. Moreover, a captopril sensor based upon FTO electrodes, with a linear range miliMolar, is proposed. These electrodes are promising candidates for the efficient electrochemical determination of captopril in pharmaceutical preparations.

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PARA-Ni-TETRAAMINOPHENYLPORPHYRIN/Co-COBALTITE/SnO2:F MODIFIED ELECTRODES: ELECTROCATALYTIC BEHAVIOR TOWARD THE OXIDATION OF HIDRAZINE

Cited by 5 publications

References 0 publications

Poly-0-Aminophenol Obtained at High Potentials by Cyclic Voltammetry on Sn0(2): F Electrodes: Application in Quantitative Determination of Ascorbic Acid

Poly-0-Aminophenol Obtained at High Potentials by Cyclic Voltammetry on Sn0(2): F Electrodes: Application in Quantitative Determination of Ascorbic Acid

Sulfite Oxidation Mediated by Ortho-Phenylenediamine / Co(ii)-Tetrakis(para-Aminophenyl)porphyrin Copolymers in Acid Medium

Captopril Electrochemical Oxidation on Fluorine‐Doped SnO₂ Electrodes and Their Determination in Pharmaceutical Preparations

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PARA-Ni-TETRAAMINOPHENYLPORPHYRIN/Co-COBALTITE/SnO2:F MODIFIED ELECTRODES: ELECTROCATALYTIC BEHAVIOR TOWARD THE OXIDATION OF HIDRAZINE

Cited by 5 publications

References 0 publications

Poly-0-Aminophenol Obtained at High Potentials by Cyclic Voltammetry on Sn0(2): F Electrodes: Application in Quantitative Determination of Ascorbic Acid

Poly-0-Aminophenol Obtained at High Potentials by Cyclic Voltammetry on Sn0(2): F Electrodes: Application in Quantitative Determination of Ascorbic Acid

Sulfite Oxidation Mediated by Ortho-Phenylenediamine / Co(ii)-Tetrakis(para-Aminophenyl)porphyrin Copolymers in Acid Medium

Captopril Electrochemical Oxidation on Fluorine‐Doped SnO2 Electrodes and Their Determination in Pharmaceutical Preparations

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Captopril Electrochemical Oxidation on Fluorine‐Doped SnO₂ Electrodes and Their Determination in Pharmaceutical Preparations