The electronic state populations are shown in Fig. . For the monomer, the S 1 state is the nπ * state, and the S 2 state is the ππ * state. In the case of trisazobenzenophane, we group the excited states as follows. For CIS, S 1 -S 3 build the nπ * manifold, and S 4 -S 6 the ππ * manifold. For CISD, S 1 -S 6 are assigned to the nπ * manifold, and S 7 -S 15 to the ππ * manifold. We note that the last group also includes the (nπ)(π * π * ) doubly excited states, but we term this group a "ππ * " manifold for simplicity (note that the (nπ)(π * π * ) states are located near the ππ * states, see Fig. ). The S 0 , nπ * , and ππ * populations were fitted using P ππ * = e -t/τ ππ * (1a)