Diffusion coefficients and conductivities of alkylimidazolium tetrafluoroborates and hexafluorophosphates

作者：Su, Wen Cheng; Chou, Cheng Huang; Wong, David Shan Hill^*; Li, Meng Hui

来源：Fluid Phase Equilibria, 2007, 252(1-2): 74-78.

DOI：10.1016/j.fluid.2006.12.001

• diffusion coefficient
• conductivity
• ionic liquid
• alkylimidazolium tetrafluoroborate
• alkylimidazolium hexafluorophosphate

In this study, diffusion coefficients of alkylimidazolium tetrafluoroborates and hexafluorophosphates ionic liquids in water at room temperature were measured by the Taylor dispersion experiment. The Wilke-Chang equation underestimated the diffusion coefficient, but a modified Wilke-Chang equation correlated diffusion coefficients well with molar volumes. The conductivities of these ion liquids were also measured. Infinite dilute conductances were calculated. The Nernst-Haskell equation accurately estimated diffusion coefficients using the infinite dilute conductance obtained.

• 出版日期2007-3-1
• 单位清华大学