Fig. 1. (a) G bands in the near-resonant Raman spectra in solution of [5]CPP2+ to [12]CPP2+ from the bottom to the top. Red and blue lines are the GA1g and GE2g Lorentzian deconvolutions, respectively. (b) The same for [n]CPP˙+. (c) and (d) GA1g and GE2g Raman shifts as a function of n showing a V-shape behaviour with [9]CPP at the vertex.
