Table 1. Literature (lit), measured (mes) and computed (comp) values for reduction potentials of dyes 4a–d a .
| Entry | Catalyst | Solvent | E 1/2(P/P–) | E 1/2(P+/P) | E 0–0 | E 1/2(P*/P–) | E 1/2(P+/P*) |
| 1 | 4a(lit) | CH3CN | –1.21 | +1.52 | 2.56 | +1.35 | –1.04 |
| 2 | 4a(mes) | CH3CN | –1.05 | +1.68 | 2.64 | +1.59 | –0.96 |
| 3 | 4c(mes) | CH3CN | –0.97 | +2.05 | 2.68 | +1.71 | –0.63 |
| 4 | 4a(comp) | CH3CN | –1.29 | +1.56 | 2.64 b | +1.35 | –1.08 |
| 5 | 4b(comp) | CH3CN | –1.18 | +1.67 | — | — | — |
| 6 | 4c(comp) | CH3CN | –1.10 | +1.76 | 2.68 b | +1.58 | –0.92 |
| 7 | 4d(comp) | CH3CN | –0.83 | +1.89 | 2.65 b | +1.82 | –0.76 |
| 8 | 4a(comp) | CH2Cl2 | –1.29 | +1.67 | 2.59 b | +1.30 | –0.92 |
| 9 | 4b(comp) | CH2Cl2 | –1.18 | +1.79 | 2.60 b | +1.42 | –0.81 |
| 10 | 4c(comp) | CH2Cl2 | –1.10 | +1.87 | 2.59 b | +1.49 | –0.72 |
| 11 | 4d(comp) | CH2Cl2 | –0.85 | +1.98 | 2.58 b | +1.73 | –0.60 |
aPotentials in V vs. SCE. The excitation energy E0–0 was estimated by the point of intersection of the normalized absorbance and emission signals. E1/2(P+/P*) = E1/2(P+/P) – E0–0 and E1/2(P*/P–) = E0–0 + E1/2(P/P–). See ESI for details.
bExperimental values of E0–0 were used.