Abstract
In this study, the amount of free volume in ionic liquids (ILs) was calculated and found to be almost half to that of their isoelectronic neutral analogues. MD simulations revealed that the significantly compressed free volume in the ILs was dominantly attributed to the strong inter-ion electrostatic interactions, which are comparable to the application of an external pressure of ∼250 MPa to the neutral analogues. Furthermore, the change in the free volume shows an interconnection with other properties of ILs, especially viscosity. The inherent high viscosity of ILs was quantitatively correlated to a low free volume available for mass transfer, and the sharp decrease in the viscosity of ILs with the addition of organic solvents was essentially caused by the introduction of free volume.
| Original language | English |
|---|---|
| Pages (from-to) | 5389-5395 |
| Number of pages | 7 |
| Journal | Physical Chemistry Chemical Physics |
| Volume | 19 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2017 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© the Owner Societies 2017.
ASJC Scopus Subject Areas
- General Physics and Astronomy
- Physical and Theoretical Chemistry