Poly(indole-6-carboxylic acid) and tetracyanoquinodimethane-modified electrode for selective oxidation of dopamine

Pandey, Prem C.; Chauhan, Dheeraj Singh; Singh, Vandana

doi:10.1016/j.electacta.2008.10.033

Cited by 31 publications

(10 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dense and compact film with excellent electrocatalysis toward DA was obtained when deposited in the range of −2.0∼2.0 V at 100 mV s −1 for six cycles in pH 4.5 PBS containing 0.02 mol L −1 indoleacetic acid. During the polymerization process, an obvious anodic peak was observed at about 0.70 V, which may be attributed to the formation of a radical cation and dication forms of indoleacetic acid [19], and no obvious cathodic peak appeared. The peak currents increased continuously with incessant scans and trended to be stable after six cycles.…”

Section: Resultsmentioning

confidence: 96%

A novel and simple biosensor based on poly(indoleacetic acid) film and its application for simultaneous electrochemical determination of dopamine and epinephrine in the presence of ascorbic acid

Zhou

Huang

et al. 2012

J Solid State Electrochem

View full text Add to dashboard Cite

A novel and simple biosensor based on poly (indoleacetic acid) film-modified electrode (PIAA/CPE) was fabricated by electrochemical polymerization of indoleacetic acid on a carbon paste electrode (CPE) through cyclic voltammetry. The resulting electrode was characterized by scanning electron microscopy, and the electrochemical behaviors of dopamine (DA) and epinephrine (EP) at the electrode were studied. It was illustrated that PIAA/CPE had excellent electrochemical catalytic activities toward DA and EP. The anodic peak currents (I pa ) were dramatically enhanced by about seven-fold for DA and ten times for EP at PIAA/CPE. Thus, the determinations of DA and EP were carried out using PIAA/CPE successfully. The linear responses were obtained in the range of 3.0×10 −7 ∼7.0× 10 −4 and 1.0×10 −6 ∼8.0×10 −4 mol L −1 with the detection limits (3σ) of 1×10 −7 and 4×10 −7 mol L −1 corresponding with DA and EP, respectively. Moreover, the cathodic peaks of DA and EP were well-separated with a potential difference about 325 mV in pH 5.3 phosphate-buffered saline, so simultaneous determination of DA and EP was carried out in this paper. Additionally, the interference studies showed that the PIAA/CPE exhibited excellent selectivity in the presence of ascorbic acid (AA). With good selectivity and sensitivity, the present method has been successfully applied to the determination of DA and EP in pharmaceutical samples.

show abstract

Section: Resultsmentioning

confidence: 96%

A novel and simple biosensor based on poly(indoleacetic acid) film and its application for simultaneous electrochemical determination of dopamine and epinephrine in the presence of ascorbic acid

Zhou

Huang

et al. 2012

J Solid State Electrochem

View full text Add to dashboard Cite

show abstract

“…Polyindoles substituted by carboxylic acids, such as poly(5carboxyindole) and poly(6-carboxyindole) coated on glassy carbon electrodes demonstrated significant reactivity and excellent sensitivity in the oxidation of DA and AA. The hybridization of certain redox mediators, namely tetracyanoquinodimethane (TCNQ), ferrocene (Fc), and dimethyl ferrocene (dmFc) [278][279][280] with polymer matrix could enhance the electron transfer between the polymer and target analyte. Nafion® was to solubilize these redox mediators as well as to provide permselectivity to the blend.…”

Section: Dopaminementioning

confidence: 99%

Polyindole and polypyrrole as a sustainable platform for environmental remediation and sensor applications

et al. 2022

View full text Add to dashboard Cite

show abstract

“…While the enhancement in sensitivity up to nanomolar level occurred due to the presence of Au particles (Mathiyarasu et al 2008). Some conducting polymers have been used for dopamine sensor without AA interference (Tu et al 2007;Pandey et al 2009). However, there is no report related to conducting polymer with metal nanoparticle, which not only help in the catalytic oxidation of DA, but also repel AA from the close proximity.…”

Section: Introductionmentioning

confidence: 95%

Synthesis of polyanthranilic acid-Au nanocomposites by emulsion polymerization: development of dopamine sensor

2014

View full text Add to dashboard Cite

Polyanthranilic acid (PANA) and polyanthranilic acid-gold (PANA-Au) nanocomposites have been synthesized through emulsion polymerization technique. Use of gold chloride as an oxidant for anthranilic acid not only provides a new route for chemical synthesis of PANA, but also explores a facile method for the formation of nanocomposites. Emulsion polymerization helps in slowing down kinetics of polymerization in comparison to one-phase polymerization and thereby induces formation of monodispersed, both pure and Au nanoparticles, embedded PANA sphere. Reaction progress of nanocomposite formation is studied by UV-Vis spectroscopy for 0-24 h. PANA-Au nanocomposites are characterized by SEM, equipped with EDS, TGA, FT-IR, XRD and electrochemical techniques. XRD of nanocomposites depicts the amorphous nature of polymer and crystalline nature of Au with crystallite size of ~ 24 nm. Differential pulse voltammetry has shown the electro-active nature of PANA. The nanocomposites with improved thermal properties show good dispersion in common organic solvents, and it can be explored for application in interference-free dopamine sensors with sensitivity 12⋅5 μA/mM. Acidic group (-COOH) on the polymer makes the sensor free from ascorbic acid interference.

show abstract

Poly(indole-6-carboxylic acid) and tetracyanoquinodimethane-modified electrode for selective oxidation of dopamine

Cited by 31 publications

References 32 publications

A novel and simple biosensor based on poly(indoleacetic acid) film and its application for simultaneous electrochemical determination of dopamine and epinephrine in the presence of ascorbic acid

A novel and simple biosensor based on poly(indoleacetic acid) film and its application for simultaneous electrochemical determination of dopamine and epinephrine in the presence of ascorbic acid

Polyindole and polypyrrole as a sustainable platform for environmental remediation and sensor applications

Synthesis of polyanthranilic acid-Au nanocomposites by emulsion polymerization: development of dopamine sensor

Contact Info

Product

Resources

About