Thermal, rheological, and ion-transport properties of phosphonium-based ionic liquids

Matthew D. Green, Christian Schreiner, Timothy Edward Long

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Phosphonium-based ionic liquids with varying counteranions from commercially available ionic liquid precursors enabled tunable viscosity, ionic conductivity, and thermal stability. Thermogravimetric analysis revealed a relationship between thermal stability and anion composition where anions with lower basicity remained stable to higher temperatures. Determination of glass transition temperatures and melting temperatures using differential scanning calorimetry revealed supercooling, crystallization, and dependence on anion composition. Rheological and ionic conductivity measurements determined the temperature-dependence of the viscosity and ionic conductivity of the phosphonium-based ionic liquids. Arrhenius analyses of conductivity and viscosity provided activation energies, which showed a decrease toward larger, more delocalized anions. An assessment according to the Walden plot displayed their efficacy relative to other ionic liquids.

Original languageEnglish
Pages (from-to)13829-13835
Number of pages7
JournalJournal of Physical Chemistry A
Volume115
Issue number47
DOIs
Publication statusPublished - 2011 Dec 1
Externally publishedYes

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Ionic Liquids
Transport properties
Anions
Ionic conductivity
transport properties
Ions
ion currents
anions
Viscosity
viscosity
liquids
conductivity
ions
Thermodynamic stability
thermal stability
Supercooling
supercooling
Alkalinity
Crystallization
Chemical analysis

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Thermal, rheological, and ion-transport properties of phosphonium-based ionic liquids. / Green, Matthew D.; Schreiner, Christian; Long, Timothy Edward.

In: Journal of Physical Chemistry A, Vol. 115, No. 47, 01.12.2011, p. 13829-13835.

Research output: Contribution to journalArticle

Green, Matthew D. ; Schreiner, Christian ; Long, Timothy Edward. / Thermal, rheological, and ion-transport properties of phosphonium-based ionic liquids. In: Journal of Physical Chemistry A. 2011 ; Vol. 115, No. 47. pp. 13829-13835.
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