TY - JOUR
T1 - Thermal, rheological, and ion-transport properties of phosphonium-based ionic liquids
AU - Green, Matthew D.
AU - Schreiner, Christian
AU - Long, Timothy Edward
PY - 2011/12/1
Y1 - 2011/12/1
N2 - 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.
AB - 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.
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U2 - 10.1021/jp206138b
DO - 10.1021/jp206138b
M3 - Article
C2 - 22026727
AN - SCOPUS:81855227407
SN - 1089-5639
VL - 115
SP - 13829
EP - 13835
JO - Journal of Physical Chemistry A
JF - Journal of Physical Chemistry A
IS - 47
ER -