Showing papers on "Supporting electrolyte published in 1986"
TL;DR: In this article, analytical solutions for diffusion-migration impedances of four systems that can serve as a basis for analysis of redox membrane-coated electrode and electrolyte-bathed membrane cells are presented.
108 citations
TL;DR: In this article, the standard rate constants k°1 and k°2 of the electron transfer between p-benzoquinone and its radical anion and the hydroquinone dianion were measured by means of cyclic voltammetry at a plane gold electrode in different aprotic solvents.
85 citations
TL;DR: Polymerisation anodique de l'aniline sur une electrode de Pt dans les electrolytes de base H 2 SO 4, HCl and HClO 4 as discussed by the authors.
71 citations
TL;DR: In this article, the effect of the nature and the concentration of counter ions on the cyclic voltammetric and chronoamperometric behavior of poly(vinylferrocene) (PVF) polymer film electrodes has been studied in different aqueous and acetonitrile electrolytes.
67 citations
TL;DR: In this article, carbon submicroelectrodes of radius 4 μm were used in highly resistive water and chlorobenzene (BCl) solutions, and the wave heights were practically independent of the concentration of supporting electrolyte and linearly dependent on substrate concentration.
57 citations
54 citations
TL;DR: It has been demonstrated recently that by reducing the electrode dimensions to very small values, however, the quantity of supporting electrolyte necessary to develop the electrical double layer can be reduced to low levels.
Abstract: : The accessible potential region in a conventional electrochemical experiment is limited by the oxidation or reduction of the solvent or supporting electrolyte. It is impossible to study the redox reactions of species with very low electron affinities or high ionization potentials by ordinary electrochemical methods. It has been demonstrated recently, however, that by reducing the electrode dimensions to very small values, however, the quantity of supporting electrolyte necessary to develop the electrical double layer can be reduced to low levels. It has thus been possible to study electrode reactions in highly resistive media; these include the oxidation of ferrocene in acetonitrile without purposely added supporting electrolyte, oxidation of chromium hexacarbonyl in pure dichloromethane, oxidation of aromatic hydrocarbons in pure benzene, oxidation ferrocene in pure acetone down to 95 C.
45 citations
TL;DR: In this article, it was found that when the working electrode potential was scanned to higher than +1 V versus SCE, the oxidized polypyrrole (PPy) film underwent an irreversible oxidation leading to chemical structure change and possibly some degradation of the film.
43 citations
TL;DR: Etude par voltammetrie cyclique de l'oxydation de cette tetraamine, et de ses proprietes de donneur d'electrons as mentioned in this paper.
Abstract: Etude par voltammetrie cyclique de l'oxydation de cette tetraamine, et de ses proprietes de donneur d'electrons
39 citations
TL;DR: In this article, a monomeric metal complex, tris(5,5′-dicarbo(3-acrylatoprop-1-oxy)-2,2′-bipyridine)ruthenium(II) as its p-toluene sulfonate salt, can be spin coated onto optically transparent SnO2 and thermally polymerized to yield a polymer modified electrode with multicolor (7 color) electrochromic properties.
36 citations
TL;DR: The reduction of TCNQ and TCNE to anion radicals and dianions at platinum and carbon electrodes in acetonitrile solution have been studied by cyclic voltammetry, using a variety of supporting electrolytes as discussed by the authors.
TL;DR: In this article, the effect of the counter ion concentration on the cyclic voltammetric behavior of TCNQ polymer film electrodes has been studied in different aqueous electrolytes.
TL;DR: Etudes de loxydation electrochimique des complexes donnes, processus qui peut etre rendu chimiquement reversible dans du dichloromethane a basse temperature ou en utilisant de lhexafluorophosphate de tetrabutylammonium, comme electrolyte de base as discussed by the authors.
TL;DR: In this article, the authors measured the reflectance spectra of p-nitroaniline adsorbed on a smooth Pt electrode with light polarized parallel with respect to the plane of incidence.
TL;DR: In this article, the authors present a survey of the electrosorption de l'uracile et de certains de ses derives fondees sur des mesures de la capacite de la double couche.
TL;DR: In this article, the potential dependence of the adsorption of Cl− ions at rhodized electrodes was studied by a radiotracer method in 1 mol dm−3 H2SO4 as supporting electrolyte.
TL;DR: In this article, the titration Eredox against the mean state of oxidation of the solution and the absorption spectra of solutions with different mean states of oxidation were determined as E'12 = - 0.935, E'13 = -0.931 and E'14 = −0.8 2-.
Abstract: Spectrophotometric, titrimetric, electron spin resonance and 77Se nuclear magnetic resonance studies made on the alkaline selenide, selenium electrolyte showed that soluble selenium species existed in four oxidation states, none of the species was a radical, and the mean state of oxidation of the Se-saturated solution was equivalent to Se3.8 2-. It was concluded that the species were Sen 2- with n = 1, 2, 3 and 4, or their protonated forms. On the basis of the Nernst equation, we analysed independently (a) the titration Eredox against the mean state of oxidation of the solution and (b) the absorption spectra of solutions with different mean states of oxidation. Thus formal redox potentials E' were determined as E'12 = -0.935, E'13 = -0.931 and E'14 = -0.914 V against s.c.e. for the couples Se2-, Se2 2-, Se2-, Se3 2- and Se2-, Se4 2- respectively in 1 mol dm-3 KOH supporting electrolyte at 304 K. It followed that E'23 = -0.919 for Se2-, Se32- and E' = -0.778 for Se3 2-, Se4 2- The concentration of each species at each redox potential and the absorption spectrum of each distinct oxidation state were found. Excellent fits and agreement between the two analyses were observed. Ultraviolet absorption spectra showed that the reduced ion was approximately 50% protonated in 1 mol dm-3 KOH supporting electrolyte.
TL;DR: In this article, the authors showed that the α-helix was induced by the addition of five transition metal chlorides in the following order: CuCl2\gtrsimCdCl2>ZnCl2>, NiCl2, and CoCl2.
Abstract: In the solution of fully neutralized poly(L-glutamic acid) in the absence of supporting electrolytes, the α-helix was induced by the addition of five transition metal chlorides in the following order: CuCl2\gtrsimCdCl2>ZnCl2>NiCl2>CoCl2. The induction did not occur by the addition of BaCl2, CaCl2, or MgCl2. The induction by transition metal cations was inhibited in the presence of a supporting electrolyte (NaCl). Distortion of circular dichroism (CD) spectra occurred as the induction of the α-helix proceeded, which was shown to be recognizable when apparent aggregation number m exceeded about 100. Conformation of the polypeptide in these aggregates was expected to be the α-helix based on the conformation in the precipitates obtained at these mixing ratios which gave distorted CD spectra, which was determined by infrared absorption spectra.
TL;DR: In this article, the authors show that an increase of the heterogeneous rate constant, a shift of the formal potentials of the V(III)/V(II) system towards more negative values, and a decrease of the diffusion coefficients are due to the resolvation of both V (III and V (II) ions when the DMF concentration in the mixture increases, as is also evident from spectrophotometric measurements.
TL;DR: In this paper, a sensitive determination method of tin by differential pulse polarography (DPP) is described, where the addition of tropolone to acetate supporting electrolyte at about pH 4.7 provides a 30-fold signal enhancement, giving a sensitivity comparable to that obtained in anodic stripping voltammetry, but without the need for enrichment by pre-electrolysis.
TL;DR: The potential dependence of the adsorption of sulphuric acid at rhodium electrodes was studied in 5 × 10−2 mol dm−3 HCIO4 supporting electrolyte as mentioned in this paper.
TL;DR: Caracterisation par les proprietes spectroscopiques. Etude electrochimique dans divers solvants contenant de l'hexafluorophosphate de tetrabutylammonium 0,1 M comme electrolyte support
Abstract: Caracterisation par les proprietes spectroscopiques. Etude electrochimique dans divers solvants contenant de l'hexafluorophosphate de tetrabutylammonium 0,1 M comme electrolyte support
TL;DR: In this paper, the formation of Ag2S monolayer has been studied in 0.1 mol dm−3 NaOH supporting electrolyte by a radiotracer method in the potential range from −400 to +200 mV (on rhe scale) using 35S labelled Na2S.
TL;DR: In this article, a detailed electrochemical study of Fe(III) chelate complexes with salicylaldehyde thiosemicarbazone (H2L1) and its S-methyl derivative H2L2 was carried out at a glassy carbon electrode in a DMF + LiCl system.
TL;DR: In this article, the reduction of Cr(III) at a dropping mercury electrode is studied in the presence of highly concentrated NaCl, NaI and Na2SO4 solutions and the results can be rationalized better fi the relative surface excesses are corrected for the amount of adsorbed water and if the discharge plane is situated outside the OHP.
TL;DR: Copper(II) alkoxides, Cu(OR)2 (R = methyl, ethyl, propyl, butyl, amyl, phenyl and quinoline groups), have been synthesised by electrolysis of alcohols or alcohols in N,N-dimethylformamide using a copper anode and Bu4N+Cl− as supporting electrolyte as discussed by the authors.
Abstract: Copper(II) alkoxides, Cu(OR)2 (R = methyl, ethyl, propyl, butyl, amyl, phenyl and quinoline groups), have been synthesised by electrolysis of alcohols or alcohols in N,N-dimethylformamide using a copper anode and Bu4N+Cl− as supporting electrolyte.
TL;DR: The physicochemical properties of the medium, its water content, and the nature of the anion of the supporting electrolyte are the main physicochemical parameters affecting whether homogeneous, adherent, and conductive poly(p-phenylene) films are obtained from electrochemical oxidation of benzene or biphenyl as discussed by the authors.
Abstract: The acidic-basic properties of the medium, its water content, and the nature of the anion of the supporting electrolyte are the main physicochemical parameters affecting whether homogeneous, adherent, and conductive poly(p-phenylene) films are obtained from electrochemical oxidation of benzene or biphenyl; use of a strictly anhydrous solvent such as CH2Cl2 or MeNO2 without a catalyst leads to conductive (σ < 1 S cm–1) and electrochromic films with BF4–, PF6–, or SbF6– anions, while insulating films are formed with ClO4– anions
TL;DR: In this paper, the potential dependence of 35 S labelled H 2 S was studied at a platinized platinum electrode in 1 mol dm −3 HClO 4 supporting electrolyte.
TL;DR: In this article, the presence of ferrous species close to Fe depend on local pH changes and hydrodynamic conditions, and the resulting oxides and hydroxides are not easily removable on stationary electrodes either at passivation potentials or during a slow reduction at −0.9 V vs. SCE.
TL;DR: In this article, the Gibbs energies of activation ΔG*2 of the second reduction step were much higher than those of the first reduction step (�G*1), but they are linearly related to each other.