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

Wilbert J. Smit | Zendy; Jan Versluis | Zendy; Ellen H. G. Backus | Zendy; Mischa Bonn | Zendy; Huib J. Bakker | Zendy

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

Author(s) -

Wilbert J. Smit,

Jan Versluis,

Ellen H. G. Backus,

Mischa Bonn,

Huib J. Bakker

Publication year - 2018

Publication title -

the journal of physical chemistry letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.563

H-Index - 203

ISSN - 1948-7185

DOI - 10.1021/acs.jpclett.7b03359

Subject(s) - delocalized electron , liquid water , molecule , spectroscopy , coupling (piping) , molecular physics , vibration , chemical physics , molecular vibration , infrared spectroscopy , chemistry , materials science , sum frequency generation spectroscopy , sum frequency generation , analytical chemistry (journal) , atomic physics , physics , optics , nonlinear optics , thermodynamics , laser , composite material , organic chemistry , quantum mechanics , chromatography

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.

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