引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 2008次   下载 1317 本文二维码信息
码上扫一扫!
分享到: 微信 更多
Identification of Free OH and its Implication on Structural Changes of Liquid Water
Ke Lin,Xiao-guo Zhou,Shi-lin Liu*,Yi Luo*
Author NameAffiliationE-mail
Ke Lin Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Xiao-guo Zhou Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Shi-lin Liu* Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China slliu@ustc.edu.cn 
Yi Luo* Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, ChinaDepartment of Theoretical Chemistry, School of Biotechnology, Royal Institute of Technology, S-10691 Stockholm, Sweden luo@kth.se 
Abstract:
The molecular structure of liquid water has been an outstanding issue for many years. The identification of free -OH holds the key in differentiating structure models for liquid water. By analyzing the relative changes of the intensity and depolarization ratio in temperature dependent Raman spectra, the occurrence of free -OH in liquid water is unambiguously de-termined. Furthermore, upon the increase of temperature from 5 oC to 85 oC, the structure of liquid water undergoes significant change, but the relative proportion of free -OH is con-siderably small and remains almost unchanged. This implies that the breaking of hydrogen bond from the tetrahedral structure prefers to occur at the site of the hydrogen acceptor. The energetic favoring of the structural change for liquid water is thus clearly revealed from experiments.
Key words:  Water, Free -OH, Raman spectrum, Micro-structure
FundProject:
液体水中的自由OH及其结构改变
林珂,周晓国,刘世林*,罗毅*
摘要:
液体水中自由OH的确认对理解液体水的微观结构非常重要. 通过随温度变化的水的拉曼光谱分析其相对强度的变化及退偏比,发现了自由-OH存在的直接证据,结果显示虽然液体水从5 oC到85 oC结构发生明显变化,但是自由-OH的含量几乎不变,且含量非常少,约为3%. 这表明了氢键从四氢键形式断裂时更容易发生在氢键受体部位.
关键词:  水,自由OH,拉曼光谱,微观结构
DOI:10.1063/1674-0068/26/02/121-126
分类号: