Cyclic voltammetry experiment

Benschoten, James J. Van; Lewis, Jane Y.; Heineman, William R.; Roston, Daryl A.; Kissinger, Peter T.

doi:10.1021/ed060p772

Cited by 216 publications

(116 citation statements)

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“…Potassium ferro-/ferricyanide is a reversible, 1-electron electrochemical system, which is easily identified using the standard criteria/requirements of a reversible electrochemical reaction, and therefore often used as a model system for demonstrating electrochemical principles. 37 All measurements were done by pipetting the ferro-/ferricyanide solutions and the control solution (pure PBS buffer) to the inlet resevoirs on the disc. The microfluidic system was then used to adding the chemicals sequentially to the electrode arrays.…”

Section: Electrochemical Probe and Applied Techniquesmentioning

confidence: 99%

Integrating electrochemical detection with centrifugal microfluidics for real-time and fully automated sample testing

et al. 2015

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Abstract. Here we present a robust, stable and low-noise experimental set-up for performing electrochemical detection on a centrifugal microfluidic platform. By using a low-noise electronic component (electrical slipring) it is possible to achieve continuous, on-line monitoring of electrochemical experiments, even when the microfluidic disc is spinning at high velocities. Automated sample handling is achieved by designing a microfluidic system to release analyte sequentially, utilizing on-disc passive valving. In addition, the microfluidic system is designed to trap and keep the liquid sample stationary during analysis. In this way it is possible to perform cyclic voltammetry (CV) measurements at varying spin speeds, without altering the electrochemical response. This greatly simplifies the interpretation and quantification of data. Finally, real-time and continuous monitoring of an entire electrochemical experiment, including all intermediate sample handling steps, is demonstrated by amperometric detection of on-disc mixing of analytes (PBS and ferricyanide).

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Section: Electrochemical Probe and Applied Techniquesmentioning

confidence: 99%

Integrating electrochemical detection with centrifugal microfluidics for real-time and fully automated sample testing

et al. 2015

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“…Cyclic voltammetry (CV) is one of the most versatile electroanalytical techniques to study electroactive species [18][19][20]. The oxidation and reduction potentials of a species can be measured with relative ease over a wide potential range.…”

mentioning

confidence: 99%

Electrochemical behaviour and structure of novel phosphine- and phosphite-substituted tungsten(0) Fischer carbene complexes

Landman

Pretorius

Fraser

et al. 2014

Electrochimica Acta

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Dedicated to the memory of Professor Robert Vleggaar is investigated by means of cyclic voltammetry. The complexes all exhibit a twoelectron oxidation process that is W-based and a one-electron reduction that is mainly localized on the carbene ligand. Complexes 1-4 and 9-12 are considerably more difficult to oxidize than 5-8 due to the better π-acceptor ability of the (CO) 4 (PR' 3 ) (R' = Ph or OPh) ligand combination than that of (CO) 3 (dppe). Density functional theory calculations on the neutral, reduced and oxidized complexes confirmed the role of the frontier orbitals in the oxidation and reduction processes and enabled formulation of mathematical relationships that can be used to predict experimental measured potentials. X-ray crystal structures of 2cis, 3 and 5 are discussed.

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“…The potentials of the first oxidation and first reduction of a complex can thus be correlated to the energies of its highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO), respectively. These two relationships for a series of 36 Fischer carbene complexes of tungsten over a large potential range (0.91V for the oxidation and 1.6 V for the reduction), are presented in Figure 12 (see supporting information (1) -(36) (see the supporting information Scheme S1 for the structures of (13) - (36)) of E HOMO and the oxidation potential E pa of the first oxidation process (left) and E LUMO and the reduction potential E pc of the first reduction process (right). Table 2 and from reference [5] and [9].…”

Section: Relationships Involving 36 Structurally Modified Fischer Carmentioning

confidence: 98%

Fischer mono- and biscarbene complexes of tungsten with mono- and dimeric heteroaromatic substituents

Landman

Buitendach

Conradie

et al. 2015

Journal of Electroanalytical Chemistry

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An electrochemical study of a series of mono and biscarbene complexes of tungsten pentacarbonyl with mono-and dimeric heteroarene substituents are reported and compared in CH 3 CN and DCM.Results revealed that the order of oxidation (reduction) depends largely on the aryl substituent attached to the carbene carbon (2-thienyl, 2-furyl or 2-(N-methylpyrrolyl)). The order of oxidation (reduction) for monocarbene complexes containing a monomeric heteroarene substituent ((1) -(3)), a dimeric heteroarene substituent ((4) -(6)) or biscarbene complexes connected with a heteroarene substituent ( (7) - (9)) is the same, namely 2-thienyl > 2-furyl > 2-(N-methylpyrrolyl). Carbene complexes containing a larger conjugated heteroarene substituent attached to the carbene carbon reduce more easily than the monomeric analogues. Tungsten biscarbene complexes exhibit two separate oxidation potentials for the two metal centres or one large oxidation peak, consistent with the simultaneous oxidation of the two W metal centres.

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Cyclic voltammetry experiment

Abstract: Cyclic voltammetry (CV) is a very useful modern electroanalytical technique; its principles and theories have been discussed by Kissinger and Heineman (f). Despite the ad-

Cited by 216 publications

References 0 publications

Integrating electrochemical detection with centrifugal microfluidics for real-time and fully automated sample testing

Integrating electrochemical detection with centrifugal microfluidics for real-time and fully automated sample testing

Electrochemical behaviour and structure of novel phosphine- and phosphite-substituted tungsten(0) Fischer carbene complexes

Fischer mono- and biscarbene complexes of tungsten with mono- and dimeric heteroaromatic substituents

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