ps. This lifetime is longer than that calculated by Cantatore, Granucci, and Persico, ∼0.4 ps, using rAM1/FOMO-CI with more active orbitals and multiple excitations. Thiel and coworkers have obtained a similar lifetime of ∼0.3 ps from OM2/MRCI SH simulations. Zhu and co-workers have calculated a lifetime of ∼0.8 ps using global switching surface hopping and state-averaged CASSCF In contrast, a much longer lifetime of ∼6 ps was reported by Martínez and co-workers based on FOMO-hh-TDA AIMS simulations. (We note though that the result seems to be very sensitive to the electronic temperature, as the same authors previously found a lifetime of ∼0.2 ps using nominally the same method 96 ). In any case, we will use the ∼1.3 ps to compare with, since the calculations for the tetrameric models are performed using CIS on supermolecular orbitals originating from the three orbitals of the monomer (HOMO-1, HOMO, and LUMO). We also note that the time constant for the ground state recovery, τ S 0 , is the same as the nπ * excited state lifetime (Tab. 2), since the ππ * state of the monomer is not populated during the dynamics (at the present level of theory), see Fig. , top.