Table 1.

Anodic and cathodic half-wave potentials (E_1/2) values measured by CV for 1-3 in acetonitrile (0.1 M TBAPF₆) at a Pt electrode (ν = 0.1 V.s^-1), E vs. Fc/Fc⁺. Fundamental gaps and optical gaps for 1-3.

Compound	$E_{1/2}^{\mathit{\text{red}}}$ (V)	$E_{1/2}^{ox1}$ (V)	Fund. gap (eV)[b]	Opt. gap (eV)[c]
1	−0.12	2.14[a]	2.26	2.15
2	−0.45	1.93[a]	2.38	2.11
3	−0.72	1.40	2.12	1.95

^[a]The anodic process is partially irreversible for 2 and fully irreversible for 1 and therefore the reported value corresponds to the oxidation peak potential $E_p^{ox}$ for these compounds.

^[b]Fundamental (Fund.) $\text{gap}=E_{1/2}^{ox1}\text{-}{E}_{1/2}^{\mathit{\text{red}}}$. For the compounds characterized by irreversible oxidation, the value of $E_{1/2}^{ox1}$ is replaced by the peak potential $E_p^{ox}$ in a first approximation.

^[c]Optical (Opt.) gap = 0-0 energy.