Long-range ion-water and ion-ion interactions in aqueous solutions

被引：15

作者：

Chen, Chen ^{[1
,2
]}

Huang, Congcong ^{[3
]}

Waluyo, Iradwikanari ^{[1
,3
]}

Weiss, Thomas ^{[3
]}

Pettersson, Lars G. M. ^{[4
]}

Nilsson, Anders ^{[2
,3
,4
]}

机构：

[1] Stanford Univ, Dept Chem, Stanford, CA 94305 USA

[2] SLAC Natl Accelerator Lab, Ctr Interface Sci & Catalysis, Sustainable Energy Catalysis SUNCAT, Menlo Pk, CA 94025 USA

[3] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

[4] Stockholm Univ, AlbaNova Univ Ctr, Dept Phys, SE-10691 Stockholm, Sweden

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2015年 / 17卷 / 13期

基金：

美国国家科学基金会; 美国国家卫生研究院;

关键词：

X-RAY-SCATTERING; KIRKWOOD-BUFF PARAMETERS; TERT-BUTYL ALCOHOL; LIQUID WATER; FLUCTUATIONS; SYSTEMS;

D O I：

10.1039/c4cp04759a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Using small-angle X-ray scattering (SAXS), we obtained direct experimental evidence on the structure of hydrated polyatomic anions, with hydration effects starkly different from those of cations (J. Chem. Phys., 2011, 134, 064513). We propose that the size and charge density of the naked ions do not sufficiently account for the differences in the SAXS curves. For cations, the ion-ion contribution gives a prominent first-order diffraction peak, whereas for anions, the low-Q enhancement in the SAXS curves indicates density inhomogeneities as a result of ion-water interactions.

引用

页码：8427 / 8430

页数：4

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