Table 1.
Photophysical properties of compounds 1, 4, 5 and 6 in deoxygenated THF.
| λabsmax (nm) |
λemmax (nm) |
Φem (%)a |
τ (ns)b | kr (s−1) | knr (s−1) | |
|---|---|---|---|---|---|---|
| 1 | 286, 340, 375 | 475 | 4.2 | 5.17 | 8.1×106 | 1.9×108 |
| 4 | 313, 361, 420 | 551 | 40 | 5.26 | 7.6×107 | 1.1×108 |
| 5 | 305, 363, 420 | 555 | 9.7 | 5.41 | 1.8×107 | 1.7×108 |
| 6 | 328, 502 | - | - | - | - | - |
a
Emission quantum yield measured via an integrating light sphere (see the Supporting Information for details)
b
Excited-state lifetime measured by time-correlated single photon counting (see the Supporting Information for details)