Transient absorption spectroscopy of the iron(II) [Fe(phen)3]2+ complex: Study of the non-radiative relaxation of an isolated iron(II) complex

► We studied optical excitation of [Fe(phen)3]2+ complex in solution. ► Upon its excitation from the 1A1 ground state, the complex is promoted towards its 1MLCT singlet excited state. ► It relaxes towards its 3MLCT and 5T2 quintet states. ► The ensemble of these processes lasts ∼9 ps. ► In ∼1.1 ns, the complex relaxes back towards its 1A1 ground state.