All the photoelectron spectra have an intense, low eKE feature that decays exponentially with increasing eKE, characteristic of thermionic emission from the hot ground state of the molecular motor anion. For the 320–398 nm spectra, the low eKE distributions can be fit to I(eKE) = I 0 exp(–eKE/k B T) to obtain an estimate of the vibrational temperature of the ground state of the anion formed after internal conversion. We found k B T ≈ 0.2 eV. Although the value of k B T is not particularly meaningful because there are competing decay mechanisms, such as autodetachment, the observation of thermionic emission is very significant because it shows that internal conversion back to the ground state occurs, following excitation in the range 320–230 nm.