Table 3.
Ground- and Excited-State Redox Potentials for Ru(btfmb)32+ in CH2 Cl2a
entry | catalyst | ΔGES | E(Ru2+/+) | E(Ru2+*/+) |
---|---|---|---|---|
1 | 3a | 2.17 eV | −0.65 V | +1.52 V |
2 | 3c | 2.05 eV | −0.89 V | +1.16 V |
3 | 3d | 2.01 eV | −0.93 V | +1.08 V |
4 | 3e | 1.99 eV | −0.95 V | +1.04 V |
Electrochemical potentials were measured through cyclic voltammetry in a standard three-electrode set-up, scan rate = 100 mV/s. A 100 mM solution of a n-Bu4N+X– salt that matched the photocatalyst counteranion was used as a supporting electrolyte. Potentials were corrected to SCE through an external ferrocene reference.