Fig. 8. Comparison between simulated and experimental absorption spectra of the three investigated complexes. The spectrum of HL–LH2 is the same reported in Fig. 3 while the spectra of LL–LH2 and HM–PucD have been recalculated by correcting the site energies of αBChl and βBChl by the additional blue-shift induced by the different out-of-plane distorsion as predicted by crystal data (for HM–PucD we have assumed the same distorsion as LL–LH2). The spectra computed with the inclusion of CT states are drawn as dashed lines.