Perylene/water clusters: some different trends in hydrogen-bonded structure induced by a large aromatic template

Measurements are reported of infrared-optical double-resonance spectra (3100–3800 cm−1) for jet-cooled perylene/(H2O)n clusters ranging up to n=8. Unusual patterns of OH-stretch resonances, which are particularly evident for the n=3–6 clusters, imply that some significant structural perturbations are taking place in the presence of the large aromatic molecule.