Effects of lithium salts on shear relaxation spectra of pyrrolidinium-based ionic liquids

Tsuyoshi Yamaguchi, Ken Ichi Mikawa, Shinobu Koda, Nobuyuki Serizawa, Shiro Seki, Kenta Fujii, Yasuhiro Umebayashi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The shear relaxation spectra of the solutions of lithium salts in ionic liquids composed of N-methyl-N-propylpyrrolidinium cation paired with bis(trifluoromethanesulfonyl)amide (TFSA-) or bis(fluorosulfonyl) amide (FSA-) anions are determined from 5 to 205 MHz at various concentrations of lithium salts. The addition of lithium salt retards the shear relaxation, together with the increase in the shear viscosity. The normalized spectra reduce to a single curve when plotted against the product of the frequency and zero-frequency shear viscosity, which indicates that the increase in the shear viscosity by lithium salts is ascribed to the increase in the relaxation time. The difference in the shear viscosity of TFSA- and FSA-based ionic liquids is also elucidated in terms of the shear relaxation time. The relationship with previous studies on ionic mobility and liquid structure is also discussed.

Original languageEnglish
Pages (from-to)7322-7327
Number of pages6
JournalJournal of Physical Chemistry B
Volume116
Issue number24
DOIs
Publication statusPublished - 2012 Jun 21
Externally publishedYes

Fingerprint

Ionic Liquids
Shear viscosity
Lithium
Ionic liquids
Viscosity
Salts
lithium
shear
salts
liquids
Amides
Relaxation time
viscosity
amides
Anions
Cations
relaxation time
Negative ions
ionic mobility
Positive ions

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Surfaces, Coatings and Films

Cite this

Effects of lithium salts on shear relaxation spectra of pyrrolidinium-based ionic liquids. / Yamaguchi, Tsuyoshi; Mikawa, Ken Ichi; Koda, Shinobu; Serizawa, Nobuyuki; Seki, Shiro; Fujii, Kenta; Umebayashi, Yasuhiro.

In: Journal of Physical Chemistry B, Vol. 116, No. 24, 21.06.2012, p. 7322-7327.

Research output: Contribution to journalArticle

Yamaguchi, T, Mikawa, KI, Koda, S, Serizawa, N, Seki, S, Fujii, K & Umebayashi, Y 2012, 'Effects of lithium salts on shear relaxation spectra of pyrrolidinium-based ionic liquids', Journal of Physical Chemistry B, vol. 116, no. 24, pp. 7322-7327. https://doi.org/10.1021/jp3032308
Yamaguchi, Tsuyoshi ; Mikawa, Ken Ichi ; Koda, Shinobu ; Serizawa, Nobuyuki ; Seki, Shiro ; Fujii, Kenta ; Umebayashi, Yasuhiro. / Effects of lithium salts on shear relaxation spectra of pyrrolidinium-based ionic liquids. In: Journal of Physical Chemistry B. 2012 ; Vol. 116, No. 24. pp. 7322-7327.
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