Table 1.
Electronic absorption, emission, and ground state electrochemical potential data for all Ru complexes.
| Compound | λmax (log ε)a | λem (20 °C)b | E1/2ox (ΔE)c | E1/2red (ΔE)c |
|---|---|---|---|---|
| 1 | 244 (4.36), 288 (4.86), 451 (4.05) | non-emissive | 1.23 (81) | −1.37 (80), −1.59 (97), −1.87 (108) |
| 2 | 245 (4.09), 289 (4.57), 452 (3.80) | non-emissive | 1.25 (80) | −1.37 (74), −1.59 (98), −1.95 (124) |
| 3 | 254 (4.41), 288 (4.94), 451 (4.12) | 625 | 1.15 (78) | −1.41 (64), −1.61 (84), −1.97 (112) |
| 4 | 257 (4.25), 297 (4.79), 455 (4.02) | non-emissive | 1.18 (76) | −1.48 (69), −1.70 (74), −1.96 (99) |
| 5 | 270 (4.41), 307 (4.67), 445 (3.89) | non-emissive | 1.26 (83) | −1.57ir |
| 6 | 266 (4.48), 291 (4.90), 450 (4.13) | 599 | 0.99 (73) | −1.65 (83), −1.83 (89), −2.07 (107) |
| 7 | 246 (4.49), 286 (4.82), 444 (4.12) | non-emissive | 1.33 (76) | −1.20 (71), −1.51 (76), −1.75 (80) |
a
“Measured in CH3CN (1.0 × 10−5 M) at 20 °C; λ in nm and log ε in L·mol−1·cm−1.
b
Measured in CH3CN at 20 °C; excitation at absorption maxima; λ in nm.
c
Measured with a glassy-carbon electrode at 100 mV/s in CH3CN containing 0.1 M NBu4PF6 and E1/2 reported in volts relative to SCE; E1/2 = (Epa + Epc)/2 in volts, and ΔE = (Epa − Epc) in mV; ir = irreversible.