Figure 3.

The molecule to metal and the metal to molecule charge transfer are illustrated in panels (a,b), respectively. $|I\rangle$, $|K\rangle$, and $|F\rangle$ represent the molecular ground state, the molecular excited state(s), and the Fermi state of the metal, respectively. ${\mu }_{KI}$, ${\mu }_{IF}$, and ${\mu }_{FK}$ are the transition dipole moments. $h_{FK}$ and $h_{IF}$ are the Herzberg–Teller coupling parameters. Reprinted (adapted) with permission from Lombardi et al. [9]. Copyright (2008) American Chemical Society.