Table 2. Relevant Absorption and Emission Data for Compounds 1a, 1b, and 1c.
| absorption | emission |
||||
|---|---|---|---|---|---|
| λ (nm), 10–4 ε (cm–1 M–1) | λem (nm) | τox (ns) | ϕoxa (%) | Stokes shift (cm–1) | |
| 1a HEX | 218 (9.94), 282 (1.81), and 315 (1.18) | 465 | 4 | 17 | 10,241 |
| 1a THF | 221 (7.45), 284 (1.27), and 318 (0.79) | 505 | 7 | 19 | 11,645 |
| 1a DCM | 220 (8.12), 283 (1.38), and 316 (0.86) | 509 | 8 | 29 | 11,999 |
| 1a ACN | 222 (13.8), 256 (3.05), and 291 (3.83) | 340, 354, and 520 | 3 | 26 | |
| 1b HEX | 224 (9.20), 282 (1.40), 294 (0.99), and 320 (0.67) | 448 | 2 | 6 | 8929 |
| 1b THF | 223 (6.93), 281 (1.05), 290 (0.79), and 321 (0.51) | 480 | 3 | 8 | 10,319 |
| 1b DCM | 225 (7.45), 280 (1.16), 294 (0.74), and 321 (0.57) | 485 | 3 | 9 | 10,534 |
| 1b ACN | 225 (11.06), 282 (1.63), 292 (1.14), and 320 (0.74) | 356 and 495 | 5 | 12 | |
| 1c HEX | 263 (7.28), 287 (1.24), 377 (0.80), and 398 (0.82) | 501 | 7 | 45 | 5166 |
| 1c THF | 262 (5.60), 285 (1.05), 378 (0.73), and 398 (0.75) | 525 | 4 | 22 | 6078 |
| 1c DCM | 264 (6.92), 281 (1.03), 379 (0.59), and 400 (0.69) | 535 | 4 | 57 | 6308 |
| 1c ACN | 259 (7.46), 282 (1.11), 376 (0.67), and 397 (0.78) | 340 and 564 | 2 | 15 | |
a
vs quinine sulfate/0.05 M H2SO4, Φ = 0.5324.