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学科主题: 物理化学
题名: Ion Segregation in Aqueous Solutions
作者: Bian, Hongtao2;  Li, Jiebo2;  Zhang, Qiang1;  Chen, Hailong2;  Zhuang, Wei1;  Gao, Yi Qin3;  Zheng, Junrong2
通讯作者: 庄巍 ;  高毅勤 ;  郑俊荣
刊名: JOURNAL OF PHYSICAL CHEMISTRY B
发表日期: 2012-12-13
DOI: 10.1021/jp310153n
卷: 116, 期:49, 页:14426-14432
收录类别: SCI
文章类型: Article
部门归属: 11
项目归属: 1107
产权排名: 2,3
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Microscopic structures and dynamics of aqueous salt solutions were investigated with the ultrafast vibrational energy exchange method and anisotropy measurements. In KSCN aqueous solutions of various concentrations, the rotational time constants of SCN- anions are proportional to the viscosities of the solutions. However, the reorientation dynamics of the water molecules are only slightly affected by the solution viscosity. With the addition of strongly hydrated F- anions, the rotations of both SCN- anions and water molecules slow down. With the addition of weakly hydrated I- anions, only the rotation of SCN- anions slows down with that of water molecules unaffected. Vibrational energy exchange measurements show that the separation among SCN- anions decreases with the addition of F- and increases with the addition of I-. The series of experiments clearly demonstrate that both structures and dynamics of ion and water are segregated in the strong electrolyte aqueous solutions.
关键词[WOS]: VIBRATIONAL-RELAXATION DYNAMICS ;  HYDROGEN-BOND EXCHANGE ;  ULTRAFAST DYNAMICS ;  ENERGY RELAXATION ;  HOFMEISTER SERIES ;  REVERSE MICELLES ;  POLAR-SOLVENTS ;  LIQUID WATER ;  HYDRATION ;  ANIONS
语种: 英语
WOS记录号: WOS:000312176000024
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/118163
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, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Liaoning, Peoples R China
2.Rice Univ, Dept Chem, Houston, TX 77005 USA
3.Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China

Recommended Citation:
Bian, Hongtao,Li, Jiebo,Zhang, Qiang,et al. Ion Segregation in Aqueous Solutions[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2012,116(49):14426-14432.
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