Preparation and characterization of electrochemically modified electrodes containing the metal complexing moiety quinolin-8-ol anchored to the polymeric film

Pontólio, José O.; Ferranti, Nara; Campos, M. L. A. M.; Romero, Juan

doi:10.1016/j.jelechem.2005.07.002

Cited by 5 publications

(8 citation statements)

References 28 publications

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“…6,23 This type of film has the advantage of having a large potential window available where metal complexes can be reduced.…”

Section: Introductionmentioning

confidence: 99%

“…The modification of an electrode surface by an organic polymeric film functionalized either by a metal complex or a metal ligand has been broadly studied due to its applications on light absorption involving electron and energy transfer [1][2][3][4][5] and electrocatalysis, [6][7][8][9] as well as for its use as a sensor for trace analysis in a variety of media. [10][11][12][13] Phenyl allyl ethers derived from aromatic phenols can be easily electrochemically polymerized on carbon electrodes to produce a modified electrode with good mechanical and chemical stability.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12][13] Phenyl allyl ethers derived from aromatic phenols can be easily electrochemically polymerized on carbon electrodes to produce a modified electrode with good mechanical and chemical stability. 6,[14][15][16][17][18][19] The electropolymerization of the monomer to form this type of film can be performed by doing scans within a potential interval less positive than the oxidation potential of the functional group to preserve the key moiety.Modified electrodes (ME) can also be prepared using phenol compounds functionalized with azo groups as the key structure to anchor a variety of ligands which can be used Steter et al 661 Vol. 19, No.…”

mentioning

confidence: 99%

“…The type of azo bond employed in this work has been previously used to anchor a quinolin moiety to complex transition metals. 6 The synthesis of the BAP-Ru complex was performed by 663 Vol. 19, No.…”

mentioning

confidence: 99%

“…These substrates were chosen because of their structural variety and because most of them have been previously studied in homogeneous catalysis using similar ruthenium complexes. 6,12,[14][15][16][17][18][19] Based on the known extinction coefficient for each organic substrate it was possible to calculate the variation …”

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confidence: 99%

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Modified electrodes prepared with polyphenolic film containing ruthenium complex and metal ligand anchored by azo covalent bond

Steter¹,

Pontólio²,

Campos³

et al. 2008

J. Braz. Chem. Soc.

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Este trabalho apresenta dois novos eletrodos de grafite modificados que foram preparados via polimerização da função fenólica, previamente funcionalizada por grupos azo (bipiridina e 2-metoxipiridina), que atuam como estruturas chaves para a ancoragem de ligantes de interesse. As sínteses dos monômeros BAP (4-([2,2']bipiridinil-4-ilazo)-fenol) e PAPmetóxi (5-(4-hidroxifenilazo)piridin-2-metóxi) foram simples, deram bons rendimentos e os monômeros foram facilmente eletropolimerizados, levando à formação de eletrodos modificados (EM) química e mecanicamente estáveis. Em solução aquosa e em circuito aberto, o EM PAP-metóxi formou complexos estáveis com Cd, Cu e Pb, produzindo picos redox bem definidos, demonstrando o grande potencial deste eletrodo para futuras aplicações analíticas. O monômero BAP foi utilizado para produzir um complexo de rutênio (BAP-Ru) que foi eletropolimerizado entre +0.50 e +0.75V (vs. Ag/AgCl), permitindo que o rutênio permanecesse disponível para atuar como catalisador. O EM BAP-Ru oxidou seletivamente uma variedade de substratos orgânicos dando produtos com rendimentos próximos ou melhores que aqueles obtidos por catálise homogênea com complexos de rutênio similares, ou quando este tipo de catalisador é impregnado em pasta de carbono.This work presents two new modified carbon electrodes which were prepared via the polymerization of a phenolic moiety previously functionalized with azo groups (bipyridine and 2-methoxypyridine) as key structures to anchor the desired ligands. The syntheses of BAP (4-([2,2']-bipyridinyl-4-ylazo)-phenol) and PAPmethoxy (5-(4-hidroxyphenylazo) pyridin-2-methoxy) were simple to perform, gave good yields and the monomers were easily electropolymerized resulting in chemically and mechanically stable modified electrodes. The PAPmethoxy ME formed stable complexes with Cd, Cu and Pb in aqueous media at open circuit and produced well defined redox peaks, showing good potential for future analytical applications. The BAP monomer was used to produce a ruthenium complex (BAP-Ru) which was electropolymerized from +0.50 to +0.75V (vs. Ag/AgCl) to leave the ruthenium available to act as a catalyst. The BAP-Ru ME was able to oxidize a variety of organic substrates with good selectivity. The yields obtained were either similar to, or better than, those obtained by homogeneous catalysis using a similar ruthenium catalyst or when this type of catalyst is supported in a carbon paste electrode. Keywords: metal complexation, polyphenolic film, ruthenium IntroductionThe modification of an electrode surface by an organic polymeric film functionalized either by a metal complex or a metal ligand has been broadly studied due to its applications on light absorption involving electron and energy transfer 1-5 and electrocatalysis, 6-9 as well as for its use as a sensor for trace analysis in a variety of media. [10][11][12][13] Phenyl allyl ethers derived from aromatic phenols can be easily electrochemically polymerized on carbon electrodes to produce a modified electrode with good mechani...

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“…6,23 This type of film has the advantage of having a large potential window available where metal complexes can be reduced.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Modified electrodes prepared with polyphenolic film containing ruthenium complex and metal ligand anchored by azo covalent bond

Steter¹,

Pontólio²,

Campos³

et al. 2008

J. Braz. Chem. Soc.

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A metal-responsive interdigitated bilayer for selective quantification of mercury(ii) traces by surface plasmon resonance

Ermakova

Raitman

Shokurov

et al. 2016

Analyst

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Reusable surface plasmon resonance chips allowing the quantitative and selective detection of mercury(ii) ions in water at the 0.01 nM level are reported. The surface-modified gold sensor consists of a rarefied self-assembled monolayer of octanethiol topped with a Langmuir-Blodgett monolayer of an amphiphilic and highly-specific chelator. The interdigitated architecture confers to the bilayer a high packing density, surface coverage, and binding-group accessibility.

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Development of a portable sensor to evaluate copper speciation in natural waters

2018

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Preparation and characterization of electrochemically modified electrodes containing the metal complexing moiety quinolin-8-ol anchored to the polymeric film

Cited by 5 publications

References 28 publications

Modified electrodes prepared with polyphenolic film containing ruthenium complex and metal ligand anchored by azo covalent bond

Modified electrodes prepared with polyphenolic film containing ruthenium complex and metal ligand anchored by azo covalent bond

A metal-responsive interdigitated bilayer for selective quantification of mercury(ii) traces by surface plasmon resonance

Development of a portable sensor to evaluate copper speciation in natural waters

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