中国科学院大连化学物理研究所机构知识库
Advanced  
DICP OpenIR  > 中国科学院大连化学物理研究所  > 期刊论文
题名: Specific Na+ and K+ cation effects on the interfacial water molecules at the air/aqueous salt solution interfaces probed with nonresonant second harmonic generation
作者: Bian, Hong-tao1;  Feng, Ran-ran1;  Guo, Yuan1;  Wang, Hong-fei1
关键词: association ;  electrolytes ;  optical harmonic generation ;  photochemistry ;  positive ions ;  potassium ;  sodium ;  water
刊名: JOURNAL OF CHEMICAL PHYSICS
发表日期: 2009-04-07
DOI: 10.1063/1.3104609
卷: 130, 期:13
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 on the polarization dependent nonresonant second harmonic generation (SHG) measurement of the interfacial water molecules at the aqueous solution of the following salts: NaF, NaCl, NaBr, KF, KCl, and KBr. Through quantitative polarization analysis of the SHG data, the orientational parameter D (D=< cos theta >/< cos(3) theta >) value and the relative surface density of the interfacial water molecules at these aqueous solution surfaces were determined. From these results, we found that addition of each of the six salts caused an increase in the thickness of the interfacial water layer at the surfaces to a certain extent. Noticeably, both the cations and the anions contributed to the changes, and the abilities to increase the thickness of the interfacial water layer were in the following order: KBr>NaBr>KCl>NaCl similar to NaF>KF. Since these changes cannot be factorized into individual anion and cation contributions, there are possible ion pairing or association effects, especially for the NaF case. We also found that the orientational parameter D values of the interfacial water molecules changed to opposite directions for the aqueous solutions of the three sodium salts versus the aqueous solutions of the three potassium salts. These findings clearly indicated unexpected specific Na+ and K+ cation effects at the aqueous solution surface. These effects were not anticipated from the recent molecular dynamics simulation results, which concluded that the Na+ and K+ cations can be treated as small nonpolarizable hard ions and they are repelled from the aqueous interfaces. These results suggest that the electrolyte aqueous solution surfaces are more complex than the currently prevalent theoretical and experimental understandings.
关键词[WOS]: SUM-FREQUENCY GENERATION ;  LIQUID-VAPOR INTERFACE ;  SPECTROSCOPY SFG-VS ;  VIBRATIONAL SPECTROSCOPY ;  AIR/WATER INTERFACE ;  AQUEOUS-SOLUTIONS ;  ORIENTED THIOCYANATE ;  DYNAMICS SIMULATIONS ;  ORIENTATIONAL ORDER ;  GLYCEROL SOLUTIONS
语种: 英语
WOS记录号: WOS:000265053200057
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141431
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

Files in This Item:

There are no files associated with this item.


作者单位: 1.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100190, Peoples R China

Recommended Citation:
Bian, Hong-tao,Feng, Ran-ran,Guo, Yuan,et al. Specific Na+ and K+ cation effects on the interfacial water molecules at the air/aqueous salt solution interfaces probed with nonresonant second harmonic generation[J]. JOURNAL OF CHEMICAL PHYSICS,2009,130(13).
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Bian, Hong-tao]'s Articles
 [Feng, Ran-ran]'s Articles
 [Guo, Yuan]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Bian, Hong-tao]‘s Articles
 [Feng, Ran-ran]‘s Articles
 [Guo, Yuan]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace