Effects of salt addition on strength and dynamics of hydrophobic interactions

被引：21
|
作者：
Fujita, Takatoshi
Watanabe, Hirofumi
Tanaka, Shigenori
机构：
[1] Kobe Univ, Grad Sch Sci & Technol, Kobe, Hyogo 6578501, Japan
[2] Kobe Univ, Fac Human Dev, Kobe, Hyogo 6578501, Japan
[3] Japan Sci & Technol Agcy, CREST, Kawaguchi 3320012, Japan
来源：
CHEMICAL PHYSICS LETTERS | 2007年 / 434卷 / 1-3期
关键词：
D O I：
10.1016/j.cplett.2006.11.112
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：
Effects of salt addition on strength and dynamics of hydrophobic interactions are investigated by molecular dynamics simulations for hydrophobic solutes in aqueous solution of various salts such as sodium chloride, ammonium chloride, and guanidinium chloride. Hydrophobic interaction is reduced by ammonium chloride, enhanced by sodium chloride, and strongly enhanced by guanidinium chloride. Addition of salts tends to delay the relaxations of hydrophobic associations by reducing water diffusivities and enhancing structuring of water. The underlying molecular mechanisms are discussed in detail. (c) 2006 Elsevier B.V. All rights reserved.
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页码：42 / 48
页数：7
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