Table 1. Photophysical and electrochemical data of iridium(iii) complexes.
| Complex | λ abs a [nm] (lg ε) | λ em a [nm] | τ b [ns] | Φ PL b | E ox onset (eV) | E g c (eV) | HOMO/LUMO b (eV) |
| 2a | 244(4.0), 296(3.7), 309(3.7), 364(2.9) | 563.0 | 1115.0 | 0.49(0.41) | 1.239 | 2.94 | –6.039/–3.049 |
| 2b | 251(4.0), 300(3.8), 315(3.8), 365(3.1) | 563.0 | 746.9 | 0.59(0.37) | 1.251 | 2.95 | –6.051/–3.101 |
| 2c | 246(4.2), 303(3.9), 315(3.9), 362(3.3) | 560.0 | 794.0 | 0.62(0.16) | 1.270 | 2.95 | –6.070/–3.120 |
| 2d | 246(4.1), 304(3.9), 315(3.9), 363(3.3) | 563.0 | 760.0 | 0.79(0.82) | 1.257 | 2.96 | –6.057/–3.097 |
| 2e | 246(4.1), 304(3.8), 314(3.8), 362(3.3) | 563.0 | 774.6 | 0.72(0.63) | 1.259 | 2.97 | –6.059/–3.087 |
| Model | 247(4.0), 303(3.8), 316(3.8), 362(3.1) | 520.0 | 561.5 | 0.26(0.07) | 1.208 | 3.18 | –6.008/–2.828 |
| 3a | 244(4.1), 298(3.8), 315(3.8), 362(3.4) | 555.0 | 585.3 | 0.55(0.49) | 1.225 | 2.99 | –6.025/–3.039 |
| 3b | 246(4.1), 299(3.8), 315(3.7), 362(3.3) | 555.0 | 733.0 | 0.66(0.67) | 1.240 | 2.99 | –6.040/–3.053 |
| 3c | 266(4.0), 298(3.8), 317(3.7), 363(3.3) | 553.0 | 465.1 | 0.68(0.54) | 1.238 | 2.99 | –6.038/–3.048 |
| 3d | 243(4.2), 304(3.9), 315(3.8), 361(3.5) | 556.0 | 759.3 | 0.76(0.49) | 1.228 | 2.98 | –6.028/–3.046 |
| 3e | 244(4.1), 303(3.8), 314(3.8), 361(3.4) | 556.0 | 793.6 | 0.73(0.71) | 1.232 | 2.98 | –6.032/–3.050 |
| 4 | 249(2.4), 311(3.7), 321(3.8), 364(3.3) | 594.0 | 597.5 | 0.33(0.18) | 1.260 | 2.81 | –6.060/–3.252 |
aIn CH2Cl2.
bData in degassed CH2Cl2 at 298 K (1.0 × 10–5 M) and data measured in solid state are given in parentheses.
cHOMO (eV) = –e(Eoxonset + 4.8), E g = 1240/λ, LUMO (eV) = E g + HOMO.