Effects of the charge density of the anions of ionic liquids on the electrode kinetics of ruthenium 2,2'-bipyridine complexes

Y. Katayama; Y. Toshimitsu; T. Miura

doi:10.1149/05011.0087ecst

Effects of the charge density of the anions of ionic liquids on the electrode kinetics of ruthenium 2,2'-bipyridine complexes

Y. Katayama, Y. Toshimitsu, T. Miura

Department of Applied Chemistry

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The electrode reaction of ruthenium 2,2'-bipyridine complexes has been investigated in 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4) ionic liquid. The diffusion of the ruthenium complexes in EMIBF₄ was slower than that we have reported in EMITFSA (TFSA^- = bis(trifluoromethylsulfonyl)amide), of which the viscosity (36 mPa s) is close to that of EMIBF₄ (37 mPa s). The rate constant of the ruthenium redox couple in EMIBF₄ was also smaller than that in EMITFSA. It was suggested that the difference in these kinetic parameters in EMIBF₄ and EMITFSA is ascribed to the coulombic interaction between the positively charged species and the anions of ionic liquids.

Original language	English
Title of host publication	Molten Salts and Ionic Liquids 18
Publisher	Electrochemical Society Inc.
Pages	87-95
Number of pages	9
Edition	11
ISBN (Print)	9781607683599
DOIs	https://doi.org/10.1149/05011.0087ecst
Publication status	Published - 2013
Event	18th International Symposium on Molten Salts and Ionic Liquids - 222nd ECS Meeting - Honolulu, HI, United States Duration: 2012 Oct 7 → 2012 Oct 12

Publication series

Name	ECS Transactions
Number	11
Volume	50
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Other

Other	18th International Symposium on Molten Salts and Ionic Liquids - 222nd ECS Meeting
Country/Territory	United States
City	Honolulu, HI
Period	12/10/7 → 12/10/12

ASJC Scopus subject areas

Engineering(all)

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10.1149/05011.0087ecst

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Effects of the charge density of the anions of ionic liquids on the electrode kinetics of ruthenium 2,2'-bipyridine complexes. / Katayama, Y.; Toshimitsu, Y.; Miura, T.
Molten Salts and Ionic Liquids 18. 11. ed. Electrochemical Society Inc., 2013. p. 87-95 (ECS Transactions; Vol. 50, No. 11).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Katayama, Y, Toshimitsu, Y & Miura, T 2013, Effects of the charge density of the anions of ionic liquids on the electrode kinetics of ruthenium 2,2'-bipyridine complexes. in Molten Salts and Ionic Liquids 18. 11 edn, ECS Transactions, no. 11, vol. 50, Electrochemical Society Inc., pp. 87-95, 18th International Symposium on Molten Salts and Ionic Liquids - 222nd ECS Meeting, Honolulu, HI, United States, 12/10/7. https://doi.org/10.1149/05011.0087ecst

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abstract = "The electrode reaction of ruthenium 2,2'-bipyridine complexes has been investigated in 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4) ionic liquid. The diffusion of the ruthenium complexes in EMIBF4 was slower than that we have reported in EMITFSA (TFSA- = bis(trifluoromethylsulfonyl)amide), of which the viscosity (36 mPa s) is close to that of EMIBF4 (37 mPa s). The rate constant of the ruthenium redox couple in EMIBF4 was also smaller than that in EMITFSA. It was suggested that the difference in these kinetic parameters in EMIBF4 and EMITFSA is ascribed to the coulombic interaction between the positively charged species and the anions of ionic liquids.",

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N2 - The electrode reaction of ruthenium 2,2'-bipyridine complexes has been investigated in 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4) ionic liquid. The diffusion of the ruthenium complexes in EMIBF4 was slower than that we have reported in EMITFSA (TFSA- = bis(trifluoromethylsulfonyl)amide), of which the viscosity (36 mPa s) is close to that of EMIBF4 (37 mPa s). The rate constant of the ruthenium redox couple in EMIBF4 was also smaller than that in EMITFSA. It was suggested that the difference in these kinetic parameters in EMIBF4 and EMITFSA is ascribed to the coulombic interaction between the positively charged species and the anions of ionic liquids.

AB - The electrode reaction of ruthenium 2,2'-bipyridine complexes has been investigated in 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4) ionic liquid. The diffusion of the ruthenium complexes in EMIBF4 was slower than that we have reported in EMITFSA (TFSA- = bis(trifluoromethylsulfonyl)amide), of which the viscosity (36 mPa s) is close to that of EMIBF4 (37 mPa s). The rate constant of the ruthenium redox couple in EMIBF4 was also smaller than that in EMITFSA. It was suggested that the difference in these kinetic parameters in EMIBF4 and EMITFSA is ascribed to the coulombic interaction between the positively charged species and the anions of ionic liquids.

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Effects of the charge density of the anions of ionic liquids on the electrode kinetics of ruthenium 2,2'-bipyridine complexes

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