Temperature dependence of vibrational relaxation of the OH bending excitation in liquid H2O

被引：37

作者：

Ashihara, Satoshi ^{[1
,2
]}

Fujioka, Sachi ^{[1
]}

Shibuya, Kazunori ^{[1
]}

机构：

[1] Tokyo Univ Agr & Technol, Dept Appl Phys, Koganei, Tokyo 1848588, Japan

[2] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2011年 / 502卷 / 1-3期

基金：

日本学术振兴会;

关键词：

WATER; ENERGY; MODE; DYNAMICS;

D O I：

10.1016/j.cplett.2010.12.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Mid-infrared pump-probe spectroscopy measurements of the OH bending vibration in pure liquid water were performed at different temperatures. The population lifetime increases from 170 +/- 15 fs at T = 295 K to 250 +/- 15 fs at T = 348 K. This temperature dependence can be explained by the decrease in the spectral overlap between the OH bending and the high-frequency librational modes, supporting the relaxation scenario that the bend vibrational energy is dominantly transferred to librational motions. It was also found that the temperature dependence becomes absent below room temperature, the possible origin for which is discussed. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：57 / 62

页数：6

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