Details

Autor(en) / Beteiligte

• Shin, J.-W.
• Hammer, N I
• Diken, E G
• Johnson, M A
• Walters, R S
• Jaeger, T D
• Duncan, M A
• Christie, R A
• Jordan, K D

Titel

Infrared Signature of Structures Associated with the H(+) (H2O)(sub n) (n = 6 to 27) Clusters

Ist Teil von

• Science (American Association for the Advancement of Science), 2004-05, Vol.304 (5674), p.1137-1140

Erscheinungsjahr

2004

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• We report the OH stretching vibrational spectra of size-selected H super +(H sub 2O) sub n clusters through the region of the pronounced "magic number" at n = 21 in the cluster distribution. Sharp features are observed in the spectra and assigned to excitation of the dangling OH groups throughout the size range 6 < = n < = 27. A multiplet of such bands appears at small cluster sizes. This pattern simplifies to a doublet at n = 11, with the doublet persisting up to n = 20, but then collapsing to a single line in the n = 21 and n = 22 clusters and reemerging at n = 23. This spectral simplification provides direct evidence that, for the magic number cluster, all the dangling OH groups arise from water molecules in similar binding sites.