The computed energy diagram indicates that electronic excitation in the singlet state followed by energy transfer and intersystem crossing (ISC) steps could lead to charge separated state localized on the [Ru(tda)(py)2] complex moeity (Fig. , CTF-3 Ru E =1.27 eV; blue arrows in the diagram on the right) which could either be quenched by a SEA to generate [CTF-Ru III ] + or to generate the initial state via a competing charge recombination reaction (dashed blue line).