Fig. 5
From: A new energy transfer channel from carotenoids to chlorophylls in purple bacteria
Dependence of excitation energies of polyenes on the conjugation length N. a At the ground-state geometry. b At the S2 state potential minimum geometry. c The energy shifts of the S2 and S y states from the ground-state geometry to the S2 state potential minimum geometry. Energies of 1Bu − in b are taken from the experimental fluorescence spectra4
