Viologen(2+/1+) and viologen(1+/0) electron-self-exchange reactions in a redox polymer

Dalton, E. F.; Murray, Royce W.

doi:10.1021/j100169a056

Cited by 63 publications

(72 citation statements)

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“…These systems comprise mixed-valence films. Studies have considered measurement of electron transfer rates, the state of solvation of the film [76,96,104] and have been performed under conditions that allow [13,104,105] or preclude [13,49,96] the development of concentration gradients of reduced (electron donor) and oxidized (electron acceptor) sites in the film bulk. For example, the current-potential curves of electrochemically doped poly(benzimidazobenzophenanthroline) [44] can, depending on the choice of environment, satisfy criteria commonly associated either with redox conductivity or electronic conductivity.…”

Section: Examples Of Systems Studiedmentioning

confidence: 99%

Solid-State Voltammetry — Analytical Prospects

Kulesza¹,

Cox

1998

Electroanalysis

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The present review discusses some current issues related to the principles and analytical aspects of electrochemical studies (typically done at room temperature) of solid, rigid or semirigid (nonfluid) systems in the absence of a liquid solution phase. Representative examples include redox and conducting organic polymers, melts and solid solutions of redox centers in solid ionic conductors, mixed-valence polynuclear inorganic materials, transition metal salts, oxides, and zeolites. The emphasis is on the elements of dynamics for the efficient delivery of charge and on reactivity of the 'redox conducting' materials. The effective (apparent) diffusional mechanism is critical to the success of most analytical measurements in solidstate. Also described are typical electrochemical cells and experimental tactics to overcome the relatively slow dynamics of transport in solid (nonfluid) systems. Application of microdimensional electrodes leads to an improvement in the quality of solid-state electrochemical data and provides new diagnostic and analytical possibilities. Results of mechanistic studies, which are relevant to the development of novel analytical methods, together with trends towards possible future applications also are discussed.

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Section: Examples Of Systems Studiedmentioning

confidence: 99%

Solid-State Voltammetry — Analytical Prospects

Kulesza¹,

Cox

1998

Electroanalysis

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“…Two redox peaks have been observed for the methyl viologen (mv) corresponding to the two electron transfer processes in accordance with the previous reports. 20 This corresponds to the two oneelectron transfer reactions, that is…”

Section: Mediummentioning

confidence: 99%

“…The redox reactions of different probes were studied in the lyotropic liquid crystalline phases by several groups. 4,[14][15][16][17][18][19][20][21][22][23] The diffusion coefficient of all these redox probes was found to decrease in the LLC media as compared to the solvent media. The extent of decrease was shown to depend on the nature of the redox probe as well as the nature of the medium.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical studies of redox probes in self-organized lyotropic liquid crystalline systems

Kumar

Lakshminarayanan

2009

J Chem Sci

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Lyotropic liquid crystalline phases formed by surfactants are of special importance due to their close resemblance to biological systems. The redox reactions in such ordered media are of fundamental interest in understanding several complex processes occurring in the biological media, where the former can act as model systems. In this work, we have carried out the redox reactions of benzo-quinone|hydroquinone, methyl viologen and ferrocenemethanol probes in a lyotropic hexagonal columnar phase (H1 phase) using cyclic voltammetry and electrochemical impedance spectroscopic studies. The liquid crystalline phase we have studied is made up of the non-ionic surfactant, Triton X-100 and water. Polarizing optical microscopic examination confirmed that the columnar hexagonal phase is retained even after the addition of redox probe as well as the supporting electrolyte. Our studies show a significant shift in the half-peak potentials of the redox probes in the H1 phase as compared to the solvent phase. The diffusion coefficient values for different redox probes in the H1 phase were also found to be significantly reduced when compared to the corresponding solvent media.

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“…When the well hydrated chloride anion is replaced by the hydrophobic perchlorate anion, [39,40] the redox hydrogel is dehydrated and the transport of electrons becomes sluggish. [40][41][42][43]. Thus, the exceptionally high D app of polymer I results not only from its long and flexible tethers, but also from the hydration of its redox centers and the maintenance of a high local dielectric constant in all volume elements.…”

Section: Dependence Of the Electron Diffusion On The Nature Of The Anionmentioning

confidence: 99%

On the parameters affecting the characteristics of the “wired” glucose oxidase anode

Mano

Mao

Heller

2005

Journal of Electroanalytical Chemistry

116

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Viologen(2+/1+) and viologen(1+/0) electron-self-exchange reactions in a redox polymer

Cited by 63 publications

References 0 publications

Solid-State Voltammetry — Analytical Prospects

Solid-State Voltammetry — Analytical Prospects

Electrochemical studies of redox probes in self-organized lyotropic liquid crystalline systems

On the parameters affecting the characteristics of the “wired” glucose oxidase anode

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