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Reduced Near-Resonant Vibrational Coupling at the Surfaces of Liquid Water and Ice

[Image: see text] We study the resonant interaction of the OH stretch vibrations of water molecules at the surfaces of liquid water and ice using heterodyne-detected sum-frequency generation (HD-SFG) spectroscopy. By studying different isotopic mixtures of H(2)O and D(2)O, we vary the strength of th...

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Detalles Bibliográficos
Autores principales: Smit, Wilbert J., Versluis, Jan, Backus, Ellen H. G., Bonn, Mischa, Bakker, Huib J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2018
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5857927/
https://www.ncbi.nlm.nih.gov/pubmed/29481753
http://dx.doi.org/10.1021/acs.jpclett.7b03359
Descripción
Sumario:[Image: see text] We study the resonant interaction of the OH stretch vibrations of water molecules at the surfaces of liquid water and ice using heterodyne-detected sum-frequency generation (HD-SFG) spectroscopy. By studying different isotopic mixtures of H(2)O and D(2)O, we vary the strength of the interaction, and we monitor the resulting effect on the HD-SFG spectrum of the OH stretch vibrations. We observe that the near-resonant coupling effects are weaker at the surface than in the bulk, for both water and ice, indicating that for both phases of water the OH vibrations are less strongly delocalized at the surface than in the bulk.