Table 2. Physical Properties of the Ionic Liquids and the VTF Parameters Used for Fitting the Dynamic Viscosity.
| cation | Tg (K) | viscosity (cP, 25 °C) | conductivity (mS/cm, 25 °C) | density (g/cm3, 22 °C) | ln(η0) (cP) | D | T0 (K) |
|---|---|---|---|---|---|---|---|
| Bmim+ | 186 | 50 | 3.3 | 1.44 | –1.93 | 4.99 | 160.8 |
| EOMmim+ | 188 | 45 | 4.6 | 1.45 | –1.95 | 4.74 | 163.7 |
| ESMmim+a | 198 | 110 | 2.0b | 1.50 | –2.21 | 5.17 | 170.6 |
| BmPyrr+ | 184 | 75 | 2.7 | 1.39c | –2.28 | 6.11 | 154.1 |
| EOMmPyrr+ | 184 | 54 | 3.9 | 1.46d | –2.06 | 5.59 | 155.1 |
| ESMmPyrr+a | 200 | 191 | 1.2b | 1.45e | –2.21 | 5.73 | 168.7 |
a
This work. For all other data, see ref (27).
b
Measured at 24 °C.
c
Measured at 23 °C.
d
Measured at 20 °C.
e
Measured at 25 °C.