Table 3. Chemical Shift (C2–H of the Cation Imidazolium Ring in 1H NMR and O=C–O of the Anion in 13C NMR) of DMSO/IL Mixtures Before and After the Addition of 5 wt % Cellulose at 25 °C for 2 h.
| DMSO/IL |
DMSO/IL-MCC |
|||||
|---|---|---|---|---|---|---|
| samples | δC2-H | δO=C–O | δC2–H | δO=C–O | ΔδC2–H | ΔδO=C–O |
| DMSO/[C4mim][CH3COO]-10:1 | 10.36 | 174.07 | 9.99 | 174.72 | –0.37 | 0.65 |
| DMSO/[C4mim][CH3COO]-5:1 | 10.46 | 174.39 | 10.15 | 174.84 | –0.31 | 0.45 |
| DMSO/[C4mim][CH3COO]-2:1 | 10.52 | 174.69 | 10.32 | 175.06 | –0.20 | 0.37 |
| DMSO/[C4mim][CH3COO]-1:1 | 10.57 | 174.98 | 10.40 | 175.23 | –0.17 | 0.25 |
| DMSO/[C3mim][CH3COO]-10:1 | 10.33 | 174.05 | 9.98 | 174.64 | –0.35 | 0.64 |
| DMSO/[C3mim][CH3COO]-5:1 | 10.43 | 174.28 | 10.15 | 174.68 | –0.28 | 0.40 |
| DMSO/[C3mim][CH3COO]-2:1 | 10.48 | 174.64 | 10.31 | 174.92 | –0.17 | 0.28 |
| DMSO/[C3mim][CH3COO]-1:1 | 10.55 | 174.84 | 10.38 | 175.09 | –0.17 | 0.25 |
| DMSO/[C2mim][CH3COO]-10:1 | 10.27 | 174.04 | 9.94 | 174.67 | –0.33 | 0.63 |
| DMSO/[C2mim][CH3COO]-5:1 | 10.35 | 174.27 | 10.10 | 174.65 | –0.25 | 0.38 |
| DMSO/[C2mim][CH3COO]-2:1 | 10.42 | 174.62 | 10.26 | 174.90 | –0.16 | 0.28 |
| DMSO/[C2mim][CH3COO]-1:1 | 10.44 | 174.81 | 10.28 | 175.06 | –0.16 | 0.25 |