Total anodic voltammetric waves of undiluted dimethylsulfoxide at Pt microelectrodes

Koncka, Marta; Stojek, Zbigniew

doi:10.1002/elan.1140071103

Cited by 16 publications

(17 citation statements)

References 9 publications

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“…[23] It is known, however, that the solvent DMSO can be oxidized by photoexcited C 60 , which in its T 1 state has a reduction potential of about + 0.8 V (vs Fc/Fc + ). [24,25] DMSO acts as a sacrificial electron donor, [26] so that a substantial concentration of the C 60 radical anion can be generated. Irradiation with visible light of axle 1 in argon-saturated DMSO indeed produced the characteristic absorption band of the radical anion at 790 nm.…”

Section: Compound First Reductionmentioning

confidence: 99%

Fluorescent Perylene Diimide Rotaxanes: Spectroscopic Signatures of Wheel–Chromophore Interactions

Baggerman

Jagesar

Vallée

et al. 2007

Chemistry A European J

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[2]- and [3]-rotaxanes with a tetraphenoxy perylene diimide core were synthesized. Hydrogen bonding between the wheel and the imide changes the optical properties of the perylene chromophore: the absorption and fluorescence spectra are red-shifted. The decay times of the rotaxanes are shorter in comparison with that of the axle. Single molecule fluorescence measurements reveal relatively narrow distributions of emission maxima and decay times. The averages are in agreement with ensemble measurements. The observed red shifts make the perylene diimide a suitable chromophore for sensing the position of the wheel on the axle.

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Section: Compound First Reductionmentioning

confidence: 99%

Fluorescent Perylene Diimide Rotaxanes: Spectroscopic Signatures of Wheel–Chromophore Interactions

Baggerman

Jagesar

Vallée

et al. 2007

Chemistry A European J

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“…The overall oxidation process includes at least three competing phenomena after the first electrochemical oxidation of DMSO [26][27][28] ͑Fig. 12͒: ͑i͒ the desired electrochemical intercalation, which proceeds in the very beginning of the electrolyte decomposition, (ii) the chemical reaction leading to DMSO 2 , and (iii) the formation of O 2 ͑bubbling is observed on the electrode as the reaction evolves as previously mentioned͒.…”

Section: Electrochemical Experimentsmentioning

confidence: 99%

Room-Temperature Electrochemical Intercalation of Oxygen or Fluorine into La[sub 2]CuO[sub 4] Using Organic Electrolytic Media: Mechanistic Approach

Delville

Barbut

Wattiaux

et al. 2004

J. Electrochem. Soc.

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The electrochemical intercalation of oxygen into La 2 CuO 4 has been studied in various anhydrous organic media. Several combinations between an organic solvent and a supporting electrolyte have been examined. The addition of an oxygen source such as KO 2 or H 2 O has been found to be unnecessary. Experiments have shown that the electrochemical oxygen insertion mainly implies the decomposition of the solvent leading to the formation of oxygen species able to oxidize the starting material. La 2 CuO 4.10 has been prepared in the DMSO associated with nBu 4 NClO 4 . A superconducting behavior is observed below 44 K and the physical characterizations of the material before and after controlled anodic polarization are reported. It has also been shown that this intercalation reaction is reversible. The mechanism of the oxygen intercalation is tentatively proposed with respect to the organic media. Fluorine has also been intercalated for the first time in such media.Oxides showing high oxidation states of metal cations are usually prepared at high temperatures under high oxygen pressures, which gives the thermodynamically stable form of the compound. Preparing such oxides at lower temperatures ͑20-300°C͒ requires reactions of ''Chimie Douce''-type, 1 often leading to metastable compounds. Besides the use of highly oxidizing reagents, 2,3 electrochemical processes have been used and many studies have shown that the use of the electric field as the driving force for redox reactions can be very beneficial in solid-state chemistry for preparing new materials at about room temperature, as for instance in the field of batteries. Initiated for the first time in 1989, the electrochemical oxidation appeared as an efficient ''Chimie Douce'' technique for intercalating oxygen into oxide host networks. 4 It is carried out in air, at room temperature, in alkaline media, and allows preparing noteworthy materials, some having never been obtained with classic synthesis routes used in solid-state chemistry.In alkaline solution, in the vicinity of the oxygen evolution, under anodic potentials, a very high oxygen activity can be obtained at the electrode surface according toOn metallic electrodes, such a reaction competes with the formation of oxide thin films ͑i.e., Al 2 O 3 , ZnO, CuO, TiO 2 ,...) 5 whereas on appropriate oxide electrodes such as A x M m O y 1 not only the surface is affected but also the bulk. When analyzed in electrochemistry, these materials present (i, E) curves which exhibit a typical plateau at potentials lower than that corresponding to oxygen evolution, which is the signature of an oxidation process according towhere A is an alkaline-earth or a lanthanide ion and M a 3d transition metal and 2␦ ϭ the number of exchanged electrons corresponding to the amount of oxidized metal cations (Cu 3ϩ for La 2 CuO 4 ). 6 Various oxides have thus been prepared and characterized, 1 some of them exhibiting quite original properties such as superconductivity for La 2 CuO 4.09 , 7 charge density ordering in La 2 NiO 4.25 , 8 ferro...

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“…For example, the presence of water in such solvents as simple alcohols [2] or DMSO [5] increases the total wave height of these solvents. They are based on the fact, that the solvent wave heights are sensitive to the presence of other electroactive and nonelectroactive components.…”

Section: Introductionmentioning

confidence: 99%

Electrooxidation and Electroreduction of Undiluted Acetonitrile at Platinum Microelectrodes. In Situ Determination of Water in Acetonitrile

2001

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Well‐defined and reproducible reduction waves of undiluted acetonitrile have been obtained at Pt microelectrodes in the presence of a minimum of 5×10−3 M tetraalkilammonium perchlorates (TAAP). At smaller TAAP concentrations, traces of alkali metal ions interfered and the wave plateau could not be obtained. Neither was it possible to obtain a total oxidation wave of acetonitrile in the presence of a small concentration of LiClO4, in this case due to the oxidation of the ClO4− counterions. An addition of water to acetonitrile led to the formation of a new cathodic wave, the height of which was proportional to concentration of water up to 0.022 mol/L. The detection limit of determination of water in pure acetonitrile was estimated as 0.0090 mol/L.

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Total anodic voltammetric waves of undiluted dimethylsulfoxide at Pt microelectrodes

Cited by 16 publications

References 9 publications

Fluorescent Perylene Diimide Rotaxanes: Spectroscopic Signatures of Wheel–Chromophore Interactions

Fluorescent Perylene Diimide Rotaxanes: Spectroscopic Signatures of Wheel–Chromophore Interactions

Room-Temperature Electrochemical Intercalation of Oxygen or Fluorine into La[sub 2]CuO[sub 4] Using Organic Electrolytic Media: Mechanistic Approach

Electrooxidation and Electroreduction of Undiluted Acetonitrile at Platinum Microelectrodes. In Situ Determination of Water in Acetonitrile

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