A Vinylanthracene and Vinylferrocene‐Containing Copolymer: A New Dual pH/Sulfide Sensor

Robinson, Kay L.; Lawrence, Nathan S.

doi:10.1002/elan.200503456

Cited by 12 publications

(11 citation statements)

References 47 publications

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“…The electrochemistry of these copolymers was previously studied as potential pH 33 and sulfide detection probes 34 and it was shown from their square wave voltammetry that a correlation between the VAc to VFc peak current and the monomer feed ratios was evident.…”

Section: Resultsmentioning

confidence: 99%

“…29,30 Copolymerization of the VFc with a second monomer has widened the analytical scope with further sensors being developed. [31][32][33][34] In these cases VFc was polymerized with 2-(methylthio)ethyl methacrylate, 31 2-hydroxyethyl methacrylate 32 and vinylanthracene. 33,34 In the present study the electrochemical behaviour of pVFc and various pVFc based copolymers is investigated, in order to aid in the development of long term stable, polymeric based sensors.…”

Section: Introductionmentioning

confidence: 99%

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Vinylferrocene Homopolymer and Copolymers: An Electrochemical Comparison

Robinson

Lawrence

2008

ANAL. SCI.

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Poly(vinylferrocene) (pVFc) homopolymer was synthesized by free radical polymerization, along with a series of pVFcbased copolymers containing either styrene, vinylanthracene or methylmethacrylate. This report details the electrochemical experiments conducted to examine the stability of the various pVFc based polymers, which is shown to be critically dependent on the extent of copolymerization. A trend was found that when the concentration of co-monomer was decreased, electrochemical stability was enhanced. Furthermore incorporation of a second monomer into the polymer chain produced a profound effect on the scan rate behaviour of the vinylferrocene moiety. As the concentration of co-monomer was decreased, the behaviour tended towards that of a diffusion controlled process. These results are of vital significance for the development of pVFc-based electrochemical sensors.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vinylferrocene Homopolymer and Copolymers: An Electrochemical Comparison

Robinson

Lawrence

2008

ANAL. SCI.

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“…Each of these species have been utilized as mediators in aqueous systems, particularly DMPD and ferrocene or ferrocene-based species for the mediated detection of H 2 S [31,14,15,17,18,19,32]. 4 ].…”

Section: Attempted Detection Of H 2 S In Rtils Using Severalmentioning

confidence: 99%

“…A large body of work exists examining the mediated detection of H 2 S at glassy carbon (GC) electrodes in aqueous solution using a diverse range of mediators such as catechol, dopamine, hydroquinone and N,N-dimethylphenylene-1,4-diamine (DMPD) [14,15], as well as diphenylamine derivatives in various aqueous buffer solutions [15][16][17]. The immobilization of an anthracene/ferrocene copolymer onto basal plane pyrolytic graphite (BPPG) electrode, and the use of ferrocene sulfonates at the platinum electrode were also examined for the mediated detection of H 2 S [18,19]. In some of these cases, such as for ferrocene, mediation of H 2 S detection takes place in the following manner:…”

Section: Introductionmentioning

confidence: 99%

The Mediated Detection of Hydrogen Sulfide in Room Temperature Ionic Liquids

O’Mahony

Compton

2010

Electroanalysis

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The detection of H 2 S was studied using several mediators in room temperature ionic liquids (RTILs) at a microelectrode. Each mediator was characterised voltammetrically, and H 2 S was added to observe if any mediation took place. A successful mediator was 3,5-tert-butyl-obenzoquinone. Cyclic voltammetry was carried out in [C 2 mim]- [NTf2]. A reductive wave was observed and attributed to the two-electron reduction of the mediator. No oxidative signal was observed. H 2 S was flowed through the system. Cyclic voltammograms showed a decrease in the reductive wave of the mediator and the onset of an oxidative signal due to the reaction between the mediator and H 2 S to form an adduct. This reaction is reversible and on purging the system with N 2 , the original reductive signal of the mediator was recovered.

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“…The detection of sulfide is dependent upon the pH of solution, at pH 7 the following equilibrium is established and the concentration of monoprotonated sulfide anion dominates H2S → HS − + H + (pKa = 6.88). The oxidation peak can be attributed to the direct oxidation of the mono -protonated sulfide anion to sulfur, HS − → S + 2e − + H + [22]. Figure 1A provides a comparison of the current densities for each of the chosen electrodes, with the corresponding peak potentials (maxima of the electrochemical oxidation peak): +0.35 V (SPE), +0.40 V (GCE), +0.43 V (EPPGE) and +0.84 V (BDDE) (vs. SCE).…”

Section: Resultsmentioning

confidence: 99%

The Mediatorless Electroanalytical Sensing of Sulfide Utilizing Unmodified Graphitic Electrode Materials

Thakur

Bernalte

Smith

et al. 2016

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Abstract:The mediatorless electroanalytical sensing of sulfide is explored at a range of commercially available graphitic based electrodes namely, edge and basal plane pyrolytic graphite (EPPGE and BPPGE, respectively), boron-doped diamond (BDDE), glassy carbon (GCE) and screen-printed electrodes (SPE). The electrochemical performance is evaluated in terms of current density/analytical signal and oxidation potential, where the GCE and SPE are found to possess the optimal electrochemical responses. The electroanalytical performance of the GCE is explored towards the electrochemical sensing of sulfide and it is found that it is hampered by sulfide passivation, thus requiring pretreatment in the form of electrode polishing between each measurement. We demonstrate that SPEs provide a simple analytically comparable alternative, which, due to their scales of economy, create disposable, one-shot sensors that do not require any pretreatment of the electrode surface. To the best of our knowledge, this is the first report using mediatorless SPEs (bare/unmodified) towards the sensing of sulfide. In addition, the electroanalytical efficacy of the SPEs is also explored towards the detection of sulfide within model aqueous solutions and real drinking water samples presenting good apparent recoveries, justifying the plausibility of this graphitic mediatorless screen-printed platform.

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A Vinylanthracene and Vinylferrocene‐Containing Copolymer: A New Dual pH/Sulfide Sensor

Cited by 12 publications

References 47 publications

Vinylferrocene Homopolymer and Copolymers: An Electrochemical Comparison

Vinylferrocene Homopolymer and Copolymers: An Electrochemical Comparison

The Mediated Detection of Hydrogen Sulfide in Room Temperature Ionic Liquids

The Mediatorless Electroanalytical Sensing of Sulfide Utilizing Unmodified Graphitic Electrode Materials

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