Photophysical properties of 3i, 22, 23 and 24 in THF solutions (10−5 M).
| Comp. | λ max abs. (nm) | λ max em. (nm) | Φ (%)a | τ (ns) |
|---|---|---|---|---|
| 3i | 400 | 486 | 43 | 1.85 |
| 22 | 358 | 475 | 0.8 | 7.47 |
| 23 | 298 | 464 | 81.7 | 3.93 |
| 24 | 260 | 528 | 88.4 | 7.74 |
Fluorescence quantum yields with anthracene in ethanol (Φ = 27%) as standard.