Table 1. Substances and DESs (Including Molar Ratio of HBD:HBA) Used in This Study, Including Their Source, Purity, Molecular Weight (M), Density (ρ) at 298.15 K and pH Values of the Aqueous Phase after Mixing with Water.
| component | source | purity/wt % | M/g·mol–1 | ρ/kg·m–3 (298.15 K) | pH of the water phase |
|---|---|---|---|---|---|
| DecA (C10H20O2) | Sigma-Aldrich | ≥98 | 172.16 | 4.1 | |
| N8881–Cl | Sigma-Aldrich | ≥97 | 404.16 | 4.0 | |
| N8881–Br | Sigma-Aldrich | ≥97 | 448.61 | 3.9 | |
| N8888–Cl | Sigma-Aldrich | ≥97 | 502.34 | 5.3 | |
| N8888–Br | Sigma-Aldrich | ≥98 | 546.80 | 5.5 | |
| N4444–Cl | Merck | ≥95 | 277.92 | 4.5 | |
| DecA:N8881–Cl (2:1)16 | prepared by mixing | ≥98 | 249.49 | 896.4 | 1.6 |
| DecA:N8881–Br (2:1)16 | prepared by mixing | ≥98 | 264.31 | 942.2 | 1.7 |
| DecA:N4444–Cl (2:1)16 | prepared by mixing | ≥97 | 207.41 | 916.8 | 1.7 |
| DecA:N8888–Br (2:1)16 | prepared by mixing | ≥98 | 297.04 | 929.8 | 1.6 |
| DecA:N8888–Cl (1.5:1) | prepared by mixing | ≥98 | 304.23 | 888.1 | 1.7 |
| DecA:N8888–Cl (2:1)16 | prepared by mixing | ≥98 | 282.22 | 888.9 | 1.6 |
| CO2 | Linde AG | ≥99.995 | 44.01 |