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Near-infrared spectroscopic study of water at high temperatures and pressures

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タイトル: Near-infrared spectroscopic study of water at high temperatures and pressures
著者: Jin, Yusuke 著作を一覧する
Ikawa, Shun-ichi 著作を一覧する
発行日: 2003年
出版者: American Institute of Physics
誌名: The Journal of Chemical Physics
巻: 119
号: 23
開始ページ: 12432
終了ページ: 12438
出版社 DOI: 10.1063/1.1628667
抄録: Near-infrared absorption of the OH stretching overtone transition of water has been measured at temperatures and pressures in the ranges of 373–673 K and 20–400 bar, respectively. The absorption profile at 673 K and 400 bar retains a mark of rotational structure, indicating that an appreciable proportion of water molecules can rotate quite freely. The molar absorption intensity decreases linearly with increasing pressure in the low-pressure region. Enthalpy for dimerization has been estimated to be 15±3 kJ/mol from the temperature dependence of the slopes. Plots of the molar absorption intensity against molar concentration are observed to be located on a single curve irrespective of the temperature. This fact indicates that the ratio of hydrogen-bond formation is largely dependent on the molar density only. A good correlation between the molar absorption intensity and the first moments of the band has been found out; this will be useful in the study of aqueous mixtures.
Rights: Copyright © 2003 American Institute of Physics
Relation (URI):
資料タイプ: article
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 井川 駿一


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