Near-infrared spectra of H2O under high pressure and high temperature: Implications for a transition from proton tunneling to hopping states

Naoki Noguchi, Kazuki Komatsu, Ayako Shinozaki, Keiji Shinoda, Hiroyuki Kagi

研究成果査読

2 被引用数 (Scopus)

抄録

The nature of protons in ice VII up to 368 °C and 16 GPa was investigated with synchrotron near-infrared spectroscopy. The absorption band of the first OH stretching overtone mode divided into doublet peaks above 5 GPa at room temperature, suggesting that proton tunneling occurs at the overtone level. As the temperature increased, the doublet peaks gradually reduced to a singlet. This result implies that thermally activated protons hop between the two potential minima along the oxygen-oxygen axis. A pressure-temperature diagram for the proton state was constructed from the changing band shape of the overtone mode.

本文言語English
ページ(範囲)509-513
ページ数5
ジャーナルSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
133
DOI
出版ステータスPublished - 12月 10 2014
外部発表はい

ASJC Scopus subject areas

  • 分析化学
  • 原子分子物理学および光学
  • 器械工学
  • 分光学

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