Table 2. Spectroscopic and Electrochemical Properties of {Re[TpXPC]}2, {Ru[TpXPC]}2, and {Os[TpXPC]}2: Soret and Q Band λmax (nm) and E1/2 Values (V vs SCE).
λmax (nm) |
||||||||||
---|---|---|---|---|---|---|---|---|---|---|
complex | Soret | Q | E1/2ox4 | E1/2ox3 | E1/2ox2 | E1/2ox1 | E1/2red1 | E1/2red2 | ΔE | refa |
{Re[TPC]}2 | 405 | 599 | 1.18 | 0.84 | 0.57 | –0.54 | b | 1.11 | tw | |
{Re[TpMePC]}2 | 407 | 601 | 1.12 | 0.78 | 0.51 | –0.55 | b | 1.06 | tw | |
{Re[TpOMePC]}2 | 408 | 602 | 1.09 | 0.74 | 0.49 | –0.57 | b | 1.06 | tw | |
{Ru[TpCF3PC]}2 | 328, 397 | 541 | 1.31 | 1.09 | 0.76 | –0.63 | –1.43 | 1.39 | (16) | |
{Ru[TPC]}2 | 328, 397 | 539 | 1.56 | 1.23 | 0.99 | 0.55 | –0.86 | –1.66 | 1.41 | (16) |
{Ru[TpMePC]}2 | 329, 398 | 538 | 1.44 | 1.18 | 0.98 | 0.52 | –0.85 | 1.37 | (16) | |
{Ru[TpOMePC]}2 | 329, 406 | 533 | 1.33 | 1.14 | 0.92 | 0.50 | –0.86 | 1.36 | (16) | |
{Os[TpCF3PC]}2 | 287, 407 | 583 | 1.28 | 1.01 | 0.79 | –1.13 | –1.54 | 1.92 | (17) | |
{Os[TPC]}2 | 287, 405 | 584 | 1.15 | 0.93 | 0.60 | –1.29 | –1.69 | 1.89 | (17) | |
{Os[TpMePC]}2 | 287, 407 | 584 | 1.35 | 1.09 | 0.88 | 0.55 | –1.31 | –1.72 | 1.86 | (17) |
{Os[TpOMePC]}2 | 286, 407 | 585 | 1.28 | 1.05 | 0.85 | 0.54 | –1.32 | –1.73 | 1.86 | (17) |
tw = this work.
A second reduction is partially discernible below −1.80 V, but it is not fully reversible at room temperature.