The structure of water on HCl solutions studied with sum frequency generation

被引：70

作者：

Baldelli, S ^{[1
]}

Schnitzer, C ^{[1
]}

Shultz, MJ ^{[1
]}

机构：

[1] Tufts Univ, Dept Chem, Medford, MA 02155 USA

来源：

CHEMICAL PHYSICS LETTERS | 1999年 / 302卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0009-2614(99)00094-9

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：

The influence of dissolved HCl on the surface of water has been investigated with sum frequency generation (SFG) spectroscopy. Ions in solution cause water on the surface to be reoriented relative to pure water, with hydrogen atoms directed toward the bulk solution. There is no signal due to molecular HCl suggesting that oriented water molecules, not molecular HCl, dominate the surface. A model is proposed to account for the reported SFG results as well as surface tension and surface potential measurements. The result suggests that application of the Gibbs equation to determine surface excess may need to be reevaluated. (C) 1999 Elsevier Science B.V. All rights reserved.

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页码：157 / 163

页数：7

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