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(a) The C≡N stretching vibrational bands of a tripeptide, Gly-PheCN-Gly, obtained under different solvent conditions, showing the sensitivity of this vibration to environment. (b) Effect of solvent condition on the spectral diffusion dynamics of the C≡N stretching vibration of the tripeptide, showing that TMAO can significantly increase the static component and hence the conformational rigidity of the peptide. These figures are adapted with permission from (81).
