How to obtain kinetic information in thin-film voltammetry from the comparison of SCV and SWV responses

Garay, Fernando; Vettorelo, Sabrina N.

doi:10.1016/j.jelechem.2020.114647

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…This deviation might be attributed to ohmic drop, [8c] but the uncompensated resistance for the DOS‐based thin films was low (2 kΩ) and similar to that for the NPOE‐based films (1.7 kΩ). These results are in agreement with theoretical studies that indicated ohmic drop of thin films can be neglected [26] . Another reason for the difference might be the kinetics of electron transfer of the Ru‐bipod complex at the film‐electrode interface or kinetics of anion transfer at the membrane–water interface.…”

Section: Resultssupporting

confidence: 91%

“…These results are in agreement with theoretical studies that indicated ohmic drop of thin films can be neglected. [26] Another reason for the difference might be the kinetics of electron transfer of the Ru-bipod complex at the film-electrode interface or kinetics of anion transfer at the membrane-water interface. Since voltammetric and potentiometric studies of PF À 6 transfer showed Nernstian behaviour, the transfer of this ion at the water-membrane interface is fast and assumed not to be the limiting factor.…”

Section: Cyclic Voltammetry Confined In Thin Filmsmentioning

confidence: 99%

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Evaluation of a Ru‐bipod Complex as a Redox Transducer for Membrane‐Based Voltammetry of Anions**

Kalaei,

Ide,

Haga

et al. 2023

ChemElectroChem

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Molecular redox compounds show promise for the development of solid contact ion selective electrodes (SC‐ISEs) for anion determinations. In this work, a hydrophobic bis‐tridentate Ru‐bipod complex was studied as a molecular redox transducer in voltammetric SC‐ISEs. Thin film voltammetric behavior was achieved in films comprised of the Ru‐bipod complex, polyvinylchloride (PVC) and a plasticiser, nitrophenyloctylether (NPOE). Importantly, the choice of plasticiser had a significant effect on the SC‐ISE response of the Ru‐bipod complex; i. e., voltammetric responses of the Ru‐bipod complex in NPOE films were sharper and more intense than in bis(2‐ethylhexyl) sebacate (DOS) films. Moreover, addition of tetradodecylammonium tetrakis(4‐chlorophenyl)borate (ETH 500) to the membrane had an unfavorable impact on detection of anions due to oxidation of this salt in the film. Although the thin film electrode showed close‐to‐Nernstian behavior in anion responses, the detection responses in the presence of very hydrophilic anions such as sulfate ion were shifted to higher potentials (>1 V) with a subsequent loss of sensitivity. Overall, the Ru‐bipod complex operates as a simple transducer in SC‐ISEs with benefits in anion detection.

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Section: Resultssupporting

confidence: 91%

Section: Cyclic Voltammetry Confined In Thin Filmsmentioning

confidence: 99%