Electrochemistry of osmium (III) and -(IV) chloride complexes in the basic aluminum chloride-1 -Methyl-3-ethylimidazolium chloride ionic liquid

I. Wen Sun; Edmund H. Ward; Charles L. Hussey

doi:10.1149/1.2095483

Electrochemistry of osmium (III) and -(IV) chloride complexes in the basic aluminum chloride-1 -Methyl-3-ethylimidazolium chloride ionic liquid

I. Wen Sun, Edmund H. Ward, Charles L. Hussey

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

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Abstract

The electrolytic reduction of [OsCl₆]^2- in the basic aluminum chloride-1-methyl-3-ethylimidazolium chloride (AlCl₃-MeEtimCl) room temperature ionic liquid produces [OsCl₆]^3-. The [OsCl₆]^2- + e- ⇌[OsCl₆]^3- electrode reaction exhibits reversible behavior at a glassy carbon electrode in this solvent and appears reversible at this electrode in pure molten MeEtimCl at 103°C as well. The formal electrode potential for this redox system in the 49.0/51.0 mole percent (m/o) AlCl₃-MeEtimCl melt is approximately -0.31V vs. Al in the 66.7/33.3 m/o ionic liquid. The average Stokes-Einstein products for the [OsCl₆]^2- and [OsCl₆]^3- ions are 6.6 x 10^-8 and 4.7 x 10^–8 g cm s^-2, respectively, at 40°C and are slightly larger than those previously found for the corresponding iridium complexes. Absorption spectra for [OsCl₆]^2- and [OsCl₆]^3- in basic AlCl₃-MeEtimCl are similar to the spectra of these complexes in aqueous HC1 solution, but seem to be less distorted. Molar absorptivities for the [OsCl₆]^3- ion are reported for the first time.

Original language	English
Pages (from-to)	3035-3038
Number of pages	4
Journal	Journal of the Electrochemical Society
Volume	135
Issue number	12
DOIs	https://doi.org/10.1149/1.2095483
Publication status	Published - 1988 Dec

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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title = "Electrochemistry of osmium (III) and -(IV) chloride complexes in the basic aluminum chloride-1 -Methyl-3-ethylimidazolium chloride ionic liquid",

abstract = "The electrolytic reduction of [OsCl6]2- in the basic aluminum chloride-1-methyl-3-ethylimidazolium chloride (AlCl3-MeEtimCl) room temperature ionic liquid produces [OsCl6]3-. The [OsCl6]2- + e- ⇌[OsCl6]3- electrode reaction exhibits reversible behavior at a glassy carbon electrode in this solvent and appears reversible at this electrode in pure molten MeEtimCl at 103°C as well. The formal electrode potential for this redox system in the 49.0/51.0 mole percent (m/o) AlCl3-MeEtimCl melt is approximately -0.31V vs. Al in the 66.7/33.3 m/o ionic liquid. The average Stokes-Einstein products for the [OsCl6]2- and [OsCl6]3- ions are 6.6 x 10-8 and 4.7 x 10–8 g cm s-2, respectively, at 40°C and are slightly larger than those previously found for the corresponding iridium complexes. Absorption spectra for [OsCl6]2- and [OsCl6]3- in basic AlCl3-MeEtimCl are similar to the spectra of these complexes in aqueous HC1 solution, but seem to be less distorted. Molar absorptivities for the [OsCl6]3- ion are reported for the first time.",

author = "Sun, {I. Wen} and Ward, {Edmund H.} and Hussey, {Charles L.}",

year = "1988",

month = dec,

doi = "10.1149/1.2095483",

language = "English",

volume = "135",

pages = "3035--3038",

journal = "Journal of the Electrochemical Society",

issn = "0013-4651",

publisher = "Electrochemical Society, Inc.",

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T1 - Electrochemistry of osmium (III) and -(IV) chloride complexes in the basic aluminum chloride-1 -Methyl-3-ethylimidazolium chloride ionic liquid

AU - Sun, I. Wen

AU - Ward, Edmund H.

AU - Hussey, Charles L.

PY - 1988/12

Y1 - 1988/12

N2 - The electrolytic reduction of [OsCl6]2- in the basic aluminum chloride-1-methyl-3-ethylimidazolium chloride (AlCl3-MeEtimCl) room temperature ionic liquid produces [OsCl6]3-. The [OsCl6]2- + e- ⇌[OsCl6]3- electrode reaction exhibits reversible behavior at a glassy carbon electrode in this solvent and appears reversible at this electrode in pure molten MeEtimCl at 103°C as well. The formal electrode potential for this redox system in the 49.0/51.0 mole percent (m/o) AlCl3-MeEtimCl melt is approximately -0.31V vs. Al in the 66.7/33.3 m/o ionic liquid. The average Stokes-Einstein products for the [OsCl6]2- and [OsCl6]3- ions are 6.6 x 10-8 and 4.7 x 10–8 g cm s-2, respectively, at 40°C and are slightly larger than those previously found for the corresponding iridium complexes. Absorption spectra for [OsCl6]2- and [OsCl6]3- in basic AlCl3-MeEtimCl are similar to the spectra of these complexes in aqueous HC1 solution, but seem to be less distorted. Molar absorptivities for the [OsCl6]3- ion are reported for the first time.

AB - The electrolytic reduction of [OsCl6]2- in the basic aluminum chloride-1-methyl-3-ethylimidazolium chloride (AlCl3-MeEtimCl) room temperature ionic liquid produces [OsCl6]3-. The [OsCl6]2- + e- ⇌[OsCl6]3- electrode reaction exhibits reversible behavior at a glassy carbon electrode in this solvent and appears reversible at this electrode in pure molten MeEtimCl at 103°C as well. The formal electrode potential for this redox system in the 49.0/51.0 mole percent (m/o) AlCl3-MeEtimCl melt is approximately -0.31V vs. Al in the 66.7/33.3 m/o ionic liquid. The average Stokes-Einstein products for the [OsCl6]2- and [OsCl6]3- ions are 6.6 x 10-8 and 4.7 x 10–8 g cm s-2, respectively, at 40°C and are slightly larger than those previously found for the corresponding iridium complexes. Absorption spectra for [OsCl6]2- and [OsCl6]3- in basic AlCl3-MeEtimCl are similar to the spectra of these complexes in aqueous HC1 solution, but seem to be less distorted. Molar absorptivities for the [OsCl6]3- ion are reported for the first time.

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Electrochemistry of osmium (III) and -(IV) chloride complexes in the basic aluminum chloride-1 -Methyl-3-ethylimidazolium chloride ionic liquid

Abstract

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