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题名: Orientation and motion of water molecules at air/water interface
作者: Gan, W;  Wu, D;  Zhang, Z;  Guo, Y;  Wang, HF
关键词: air/water interface ;  water molecules ;  orientation and motion
刊名: CHINESE JOURNAL OF CHEMICAL PHYSICS
发表日期: 2006-02-27
DOI: 10.1360/cjcp2006.19(1).20.5
卷: 19, 期:1, 页:20-24
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Physics
英文摘要: Here we report a quantitative study of the orientational structure and motion of water molecule at the air/water interface. Analysis of Sum Frequency Generation (SFG) vibrational peak of the free O-H stretching band at 3700 cm(-1) in four experimental configurations showed that orientational motion of water molecule at air/water interface is libratory within a limited angular range. The free OH bond of the interfacial water molecule is tilted around 33 degrees from the interface normal and the orientational distribution or motion width is less than 15 degrees. This picture is significantly different from the previous conclusion that the interfacial water molecule orientation varies over a broad range within the ultrafast vibrational relaxation time, the only direct experimental study concluded for ultrafast and broad orientational motion of a liquid interface by Wei et al. (Phys. Rev. Lett. 86, 4799, (2001)) using single SFG experimental configuration.
关键词[WOS]: SUM-FREQUENCY GENERATION ;  HYDROGEN-BOND DYNAMICS ;  SURFACE-ADSORPTION LAYERS ;  LIQUID-VAPOR INTERFACE ;  X-RAY REFLECTIVITY ;  VIBRATIONAL SPECTROSCOPY ;  THEORETICAL-ANALYSIS ;  SPECTRUM ;  SIMULATIONS ;  ENERGETICS
语种: 英语
WOS记录号: WOS:000236175100006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140168
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing 100080, Peoples R China

Recommended Citation:
Gan, W,Wu, D,Zhang, Z,et al. Orientation and motion of water molecules at air/water interface[J]. CHINESE JOURNAL OF CHEMICAL PHYSICS,2006,19(1):20-24.
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