Local hydrogen-bonding structure in liquid water probed by IR-multiphoton excitation
Local hydrogen-bonding structure in liquid water probed by IR-multiphoton excitation
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DOI：
10.1016/j.cplett.2005.12.055
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发表时间：
2006-03-10
影响因子：
2.8
通讯作者：
Kondow, T
中科院分区：
文献类型：
--
作者：
Toyama, N;Kohno, JY;Kondow, T
用与液态水的 OH 伸缩模式共振的红外激光照射液态水束。水合氢离子 H3O+(H2O)(n) 和氢氧根离子 OH-(H2O)(n) 被喷射到气相中。离子强度对红外激光功率和频率的依赖性表明，离子对态 (H+...OH-) 是由液态水中水分子的振动四光子激发产生的，随后被单独喷射到气相。四光子激发在特定的局部结构中进行，其中水分子与邻近的水分子相互作用较弱。 (c) 2005 Elsevier B.V. 保留所有权利。
A liquid beam of water was irradiated with an IR-laser resonant to the OH stretching mode of liquid water. Hydrated hydonium ions, H3O+(H2O)(n), and hydroxyl ions, OH-(H2O)(n), were ejected to the gas phase. Dependences of the ion intensity on the power and the frequency of the IR laser show that an ion-pair state, (H+...OH-), was produced by vibrational four-photon excitation of a water molecule in the liquid water and was subsequently separately ejected to the gas phase. The four-photon excitation proceeds in a particular local structure, where the water molecule weakly interacts with the neighboring ones. (c) 2005 Elsevier B.V. All rights reserved.