Immobilization of purine bases on a poly-4-aminophenol matrix

Brito‐Madurro, Ana G.; Ferreira, Lucas Franco; Vieira, Sabrina Nunes; Ariza, Rafael; Goulart, Luiz Ricardo; Madurro, João M.

doi:10.1007/s10853-006-0235-0

Cited by 34 publications

(26 citation statements)

References 28 publications

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“…In this work, the electropolymerization of poly(aminophenol) film on the graphite electrode was made as described in the literature [14,15]. During the electropolymerization, an increase in current values is observed after the first cycle in the potential range of the growing polymer.…”

Section: Resultsmentioning

confidence: 99%

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Surface properties of sensors based on aminophenol-polymerized film

Coelho

Melo

Rezende

et al. 2011

J Solid State Electrochem

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In this work, carbon electrodes modified with aminophenols were developed for the production of pesticides biosensors based on acetylcholinesterase. The polymers were potentiodynamically deposited on a graphite electrode surface by the oxidation of monomers, 2-aminophenol, 3-aminophenol and 4-aminophenol. The electrochemical behaviour and surface analysis of the electrodes modified by polyaminophenols non-immobilized and immobilized on acetylcholinesterase were studied by cyclic voltammetry, electrochemical impedance spectroscopy and atomic force microscopy. Roughness values obtained for graphite electrodes modified with poly(4-aminophenol) and poly(4-aminophenol)/acetylcholinesterase were 174 and 86 nm, respectively. The acetylcholinesterase enzyme was immobilized on a graphite and a graphite modified with poly(4-aminophenol), and these electrodes were coupled in the flow system. Potentiometric response due to hydrogen ions generated by an enzymatic system in the presence of acetylcholine chloride substrate was evaluated. The results showed that the graphite/poly(4-aminhophenol) sensor presents high sensitivity to hydrogen ions when compared with other graphite/polyaminophenols sensors. The biosensor coupled in a continuous flow system was employed for the detection of dichlorvos. The detection and quantification limits were 0.8 and 2.4 μmol L −1 dichlorvos, respectively. This sensor reveals an efficient and promising material for biomolecules immobilization.

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Section: Resultsmentioning

confidence: 99%

“…The procedure of electropolymerization was carried through in accordance with that described in the literature [14,15]. The analytical response of the sensors was evaluated using acetic acid solutions (0.050-100 mmol L −1 ) containing 1.0 mmol L −1 phosphate buffer/0.1 mol L −1 KCl.…”

Section: Apparatusmentioning

confidence: 99%

Surface properties of sensors based on aminophenol-polymerized film

Coelho

Melo

Rezende

et al. 2011

J Solid State Electrochem

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“…The procedure of electropolymerization was performed as described in the literature (Brito-Madurro et al, 2007;Franco et al, 2008a). The analytical response of the sensor was evaluated using acetic acid solutions (0.05 to 100 mmol L -1 ), containing 1.0 mmol L -1 phosphate buffer in 0.1 mol L -1 KCl.…”

Section: Preparationmentioning

confidence: 99%

A Biosensor Using Poly(4-Aminophenol)/acetylcholinesterase modified graphite electrode for the detection of dichlorvos

Melo

Franco

Afonso

et al. 2011

Braz. arch. biol. technol.

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“…The fabrication, characterization and application of polymer modified electrodes (PMEs) are important themes and a core area of research in chemistry. Electrochemical methods can effectively tailor the chemical and physical properties of the resulting polymer, including mechanical I resistance, electrical conductivity, stability and high electron affinity [1]. They can also exert control over the parameters of the film thickness and homogeneity [2].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and surface characterization of poly(4-aminodiphenylamine) film modified electrode and its application for lead and cadmium determination

Al-Hinaai

Al-Harthi

Khudaish

2014

SQU Journal for Science

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Poly(4-aminodiphenylamine), Padpa, film was synthesized electrochemically on a glassy carbon electrode by potentiodynamic repetitive cycling of 4-aminodiphenylamine (4-adpa) in 1.0 M HCl. The mechanistic steps involved the oxidation of the protonated monomer to diimine species followed by its dimerization to form the mono-charged radical intermediate, which was considered as the initiation step for the progress of polymerization. The electrochemical properties and surface morphology of the film modified electrode were characterized using electrochemical and various surface scanning techniques. The XPS data demonstrated the existence of =N bonding responsible for polymer formation, while the AFM image revealed a uniform and symmetrical fiber structure with low energy dissipation. The modified electrode was primarily applied as an environmental sensor for the simultaneous and selective determination of Cd 2+

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Immobilization of purine bases on a poly-4-aminophenol matrix

Cited by 34 publications

References 28 publications

Surface properties of sensors based on aminophenol-polymerized film

Surface properties of sensors based on aminophenol-polymerized film

A Biosensor Using Poly(4-Aminophenol)/acetylcholinesterase modified graphite electrode for the detection of dichlorvos

Fabrication and surface characterization of poly(4-aminodiphenylamine) film modified electrode and its application for lead and cadmium determination

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