Table 1.
Fluorescent Properties of Aminopyridines.
| Entry | Structure (with Isolated Yield) | λA/nm 1 | λex/nm | λem/nm 2 | ϕ 3 |
|---|---|---|---|---|---|
| 1 |
 1 (71%) |
270 | 390 | 480 | 0.34 |
| 2 |
 2 (24%) |
270 | 390 | 480 | 0.31 |
| 3 |
 3 (65%) |
270 | 390 | 480 | 0.44 |
| 4 |
 4 (52%) |
270 | 390 | 485 | 0.31 |
| 5 |
 5 (60%) |
270 | 390 | 485 | 0.27 |
| 6 |
 6 (52%) |
270 | 390 | 485 | 0.32 |
| 7 |
 7 (53%) |
270 | 390 | 485 | 0.22 |
| 8 |
 8 (17%) |
258 | 345 | 455 | 0.02 |
| 9 |
 9 (67%) |
270 | 390 | 480 | 0.35 |
| 10 |
 10 (57%) |
270 | 390 | 480 | 0.30 |
1 Absorption maxima in ethanol (longest wavelength transition); 2 Maxima of the corrected emission spectra in ethanol; 3 External standard: 9,10-diphenylanthracene (ϕ = 0.95, in cyclohexane).