Table 2.
The 13C Nuclear magnetic resonance (NMR) chemical shifts (δ (ppm) relative to TMS) of [A2im][CH3OCH2COO] in [A2im][CH3OCH2COO]/DMSO(DMF/DMA)(R = 2) solvent and in the mixture of [A2im][CH3OCH2COO]/DMSO(DMF/DMA)(R = 2)/cellulose (8%) solution at room temperature.
| [A2im][CH3OCH2COO]/DMSO/Cellulose Solution | ||||||||
|---|---|---|---|---|---|---|---|---|
| Cellulose Concentration (%) | δ (ppm) | |||||||
| C2 | C4,4′ | C5,5′ | C6,6′ | C7,7′ | C8 | C9 | C10 | |
| 0 | 137.80 | 122.93 | 57.46 | 132.48 | 119.51 | 50.57 | 72.99 | 172.81 |
| 8 | 137.52 | 122.90 | 57.57 | 132.35 | 119.72 | 50.70 | 72.77 | 173.25 |
| Δδ | −0.28 | −0.03 | 0.11 | −0.13 | 0.21 | 0.13 | −0.22 | 0.44 |
| [A2im][CH3OCH2COO]/DMF/cellulose solution | ||||||||
| 0 | 138.98 | 123.83 | 58.19 | 133.41 | 120.24 | 51.52 | 73.93 | 173.91 |
| 8 | 138.67 | 123.78 | 58.26 | 133.27 | 120.39 | 51.62 | 73.69 | 174.29 |
| Δδ | −0.31 | −0.05 | 0.07 | −0.14 | 0.15 | 0.10 | −0.24 | 0.38 |
| [A2im][CH3OCH2COO]/DMA/cellulose solution | ||||||||
| 0 | 137.77 | 122.57 | 56.89 | 132.23 | 118.95 | 50.18 | 72.64 | 172.53 |
| 8 | 137.37 | 122.47 | 56.93 | 132.02 | 119.06 | 50.26 | 72.34 | 172.90 |
| Δδ | −0.40 | −0.10 | 0.04 | −0.21 | 0.11 | 0.08 | −0.30 | 0.37 |