Table 5.
Lifetime of the pyrene monomer, M*, E* and CS * of CS@Py registered for the different solvents in the presence of increasing oxygen concentrations.
| Solvent | [O2] | ML* | MS* | E* | CS* | |
|---|---|---|---|---|---|---|
| mm | τ1 [ns] | τ2 [ns] | τg [ns] | τd [ns] | τCS [ns][a] | |
| Hexane | 0[b] 3.1 14.7 | 65.5±5 20.7±0.8 24.0±0.9 | 5.2±0.4 2.9±0.2 3.2±0.1 | 5.6±0.6 –[c] –[c] | 46.9±1 15.1±0.2 4.2±0.1 | 32.9±4 33.1±5 28.7±3 |
| Dichloromethane | 0[b] 2.2 10.7 | 34.3±2 25.2±0.3 –[c] | 3.7±0.3 1.8±0.1 –[c] | 4.0±3 9.7±1 –[c] | 58.8±4 30.4±0.5 11.0±0.3 | 35.1±8 29.6±3 27.4±5 |
| Ethyl acetate | 0[b] 1.9 8.89 | 73.9±2 24.5±2 23.1±1 | 13.2±1 8.2±0.7 3.3±0.1 | 9.2±0.1 6.7±1 4.1±0.2 | 49.8±0.5 18.9±0.6 5.8±0.2 | 17.6±4 16.3±3 16.1±5 |
| Tetrahydrofuran | 0[b] 2.1 10.0 | 84.9±2 23.5±1 28.1±1 | 14.3±1 11.0±2 4.8±0.2 | 19.0±2 10.5±0.4 3.1±0.1 | 58.0±1 21.2±0.5 8.1±0.2 | 30.4±5 32.6±8 31.5±9 |
| Chloroform | 0[b] 2.4 11.5 | 34.8±1 41.6±1 25.0±3 | 13.1±2 15.4±1 5.0±0.2 | 13.0±0.3 15.2±0.9 3.47±0.7 | 39.0±1 19.8±0.8 9.2±0.6 | 32.9±5 32.2±6 25.3±4 |
| Toluene | 0[b] 2.1 9.9 | 89.8±6 60.5±2 27.3±4 | 20.1±1 13.9±0.5 3.6±0.2 | 22.6±1 10.0±0.5 4.4±0.2 | 58.6±2 22.5±0.6 6.0±0.2 | 23.7±5 23.0±4 17.7±7 |
| Dioxane | 0[b] 1.3 6.3 | 81.1±2 39.9±1 26.3±3 | 21.8±1 13.2±2 11.3±1 | 24.2±3 14.7±0.6 6.3±0.5 | 63.2±4 38.4±0.8 15.5±0.8 | 38.9±4 33.3±8 27.9±7 |
[a] Average lifetime calculated as τav=ΣAiτi2/ΣAiτi. [b] Under nitrogen atmosphere. [c] The lifetime value was close to that of the detection limit of the instrument (<1 ns).