Fig. 6: Tentative energy-level scheme for the isomerization of D and O in non-polar solvents.
From: Solvent tuning of photochemistry upon excited-state symmetry breaking
Green hexagon represents the triazine electron acceptor, yellow circles are the electron donors and orange shading is the electronic excitation. The allene state is a charge-separated state. Only the difference between the activation energies EaD − EaO can be estimated, but their absolute values are unknown, as is the relative energy of the allene state of D.
