Electrochemical and physicochemical properties of cyclic amine-based Brønsted acidic ionic liquids

Tzi Yi Wu, Shyh-Gang Su, Yuan Chung Lin, Hong-Paul Wang, Ming Wei Lin, Shr Tusen Gung, I-Wen Sun

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Several low-cost ionic liquids (ILs) containing pyrrolidinium, piperidinium, or azepanium units as cations, and formate, trifluoroacetate, or hydrogen sulfate groups as anions, are synthesized. The electrochemical and physicochemical properties, such as viscosity, density, conductivity, electrochemical window of the ILs, and the diffusion coefficient of ferrocene in the ILs are studied. All ILs studied here are liquid at room temperature with a high ionic conductivity (up to 30.7 mS cm-1) at room temperature. Hydrogen sulfate-based ILs exhibits a larger electrochemical window (3.98-3.99 V) than formate- and trifluoroacetate-based ILs (3.22-3.29 V). The results of this study can be used to choose the proper combination of cations and anions for the desired applications.

Original languageEnglish
Pages (from-to)853-862
Number of pages10
JournalElectrochimica Acta
Volume56
Issue number2
DOIs
Publication statusPublished - 2010 Dec 30

Fingerprint

Ionic Liquids
Ionic liquids
Amines
formic acid
Trifluoroacetic Acid
Sulfates
Anions
Cations
Hydrogen
Negative ions
Positive ions
Ionic conductivity
Viscosity
Temperature
Liquids
Costs

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

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abstract = "Several low-cost ionic liquids (ILs) containing pyrrolidinium, piperidinium, or azepanium units as cations, and formate, trifluoroacetate, or hydrogen sulfate groups as anions, are synthesized. The electrochemical and physicochemical properties, such as viscosity, density, conductivity, electrochemical window of the ILs, and the diffusion coefficient of ferrocene in the ILs are studied. All ILs studied here are liquid at room temperature with a high ionic conductivity (up to 30.7 mS cm-1) at room temperature. Hydrogen sulfate-based ILs exhibits a larger electrochemical window (3.98-3.99 V) than formate- and trifluoroacetate-based ILs (3.22-3.29 V). The results of this study can be used to choose the proper combination of cations and anions for the desired applications.",
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Electrochemical and physicochemical properties of cyclic amine-based Brønsted acidic ionic liquids. / Wu, Tzi Yi; Su, Shyh-Gang; Lin, Yuan Chung; Wang, Hong-Paul; Lin, Ming Wei; Gung, Shr Tusen; Sun, I-Wen.

In: Electrochimica Acta, Vol. 56, No. 2, 30.12.2010, p. 853-862.

Research output: Contribution to journalArticle

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AU - Sun, I-Wen

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