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Absorption spectra of (dA)20 with (a) four, (b) six, and (c) eight adenines included in the QM region and their decomposition into exciton, monomer-like, excimer, and charge-transfer states at the CAM-B3LYP/def2-SV(P) level of theory. The two vertical lines indicate the excitation window chosen for the dynamics. Panel (c) is convoluted from data taken from ref (9).
