Table 2. Photophysical Properties of the Extended and Nitro Compounds 5a–5d (See Chart 4) in THF (Top) and Acetonitrile (MeCN, Bottom).
| λab (nm) | εmax (104 M–1 cm–1) | λfl (nm) | ϕ | τ (ns) | |
|---|---|---|---|---|---|
| 5a | 537.0 | 3.8 | 565.0 | 0.16 | 1.46 (59%)–4.19 (41%) |
| 5b | 538.5 | 4.6 | 568.0 | 0.07 | 1.17 (80%)–3.45 (20%) |
| 5c | 535.5 | 4.1 | 564.0 | 0.16 | 1.32 (55%)–4.16 (45%) |
| 5d | 538.5 | 6.8 | 569.0 | 0.04 | 0.30 (98%)–1.25 (2%) |
| 5a | 530.5 | 3.8 | 561.0 | 0.07 | 0.44 (97%)–2.35 (3%) |
| 5b | 533.0 | 3.8 | 562.0 | 0.04 | 0.31 (98%)–1.34 (2%) |
| 5c | 530.0 | 4.3 | 559.0 | 0.09 | 0.70 (99%)–2.22 (1%) |
| 5d | 533.5 | 6.9 | 564.0 | 0.02 | 0.20 (99%)–1.08 (1%) |