We first assess whether the 2 2 Π → 1 2 Σ transition (analog of the atomic 2 P → 2 S transition) is suitable for optical cycling. Just as in the case of neutral molecules, this transition is characterized by a highly diagonal FCFs (see Table in the SI). The large excitation energy (≈ 4 eV) and a strong transition dipole moment give rise to a short radiative lifetime of the excited state. Unfortunately, these advantageous properties come together with undesired ones. First, there are intermediate states, which can drain the populations out of the OCC. Second, the excitation energy of this transition is in an undesirable UV range.