Table 3. Luminescence Transition Data for DyCl3 Dissolved in Choline Chloride-Based DESs With Ethylene Glycol and Urea as HBDs.
| HBD | transition | λmax./nm | integrated intensity |
|---|---|---|---|
| ethylene glycol | 4F9/2 → 6H13/2 | 573.6 | 11.35 |
| 4F9/2 → 6H11/2 | 661.9 | 0.91 | |
| urea | 4F9/2 → 6H13/2 | 574.7 | 13.94 |
| 4F9/2 → 6H11/2 | 663.8 | 1.27 |