Comparative study of electron transfer reactions at the ionic liquid/water and organic/water interfaces.

Comparative study of electron transfer reactions at the ionic liquid/water and organic/water interfaces. Research Abstract Details 

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Comparative study of electron transfer reactions at the ionic liquid/water and organic/water interfaces. Abstract Text:

Laforge,Takashi Kakiuchi,Fumiko Shigematsu,Michael V Mirkin,

The rates of electron transfer (ET) reactions at the water/ionic liquid (IL) interface have been measured for the first time using scanning electrochemical microscopy. The standard bimolecular rate constant of the interfacial ET between ferrocene dissolved in 1-octyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide and aqueous ferricyanide (0.4 M-1 cm s-1) was found to be approximately 30 times higher than the corresponding rate constant measured at the water/1,2-dichloroethane interface. The driving force dependence of the ET rate was investigated over a wide range of the interfacial potential drop values (>200 mV). The observed Butler-Volmer-type dependence is discussed in terms of the interfacial model. The ET was also probed at the interface between aqueous solution and the mixture of the IL and 1,2-dichloroethane. The mole fractions in this mixture were varied systematically to investigate the transition from the water/organic to the water/IL interface. The observed decrease in the rate constant with increasing mole fraction of 1,2-dichloroethane is in contrast with the previously reported direct correlation between the electrochemical rate constant and the diffusion coefficient of redox species in solution.

Comparative study of electron transfer reactions at the ionic liquid/water and organic/water interfaces. Publishing Authors By Initials

FO Laforge,T Kakiuchi,F Shigematsu,MV Mirkin,

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Comparative study of electron transfer reactions at the ionic liquid/water and organic/water interfaces. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of the American Chemical Society

VOLUME: 126

Page Numbers: 15380-1

Journal Abbreviation: J. Am. Chem. Soc.

ISSN: 0002-7863

DAY: 1

MONTH: Dec

YEAR: 2004

Comparative study of electron transfer reactions at the ionic liquid/water and organic/water interfaces. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Comparative study of electron transfer reactions at the ionic liquid/water and organic/water interfaces.

AFFILIATION: Department of Chemistry & Biochemistry, Queens College-CUNY, Flushing, New York 11367, USA.

Country: United States

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MEDLINETA: J Am Chem Soc

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