Raman study on the structure of 3-mercaptopropionic acid monolayers on silver

被引：42

作者：

Kudelski, A ^{[1
]}

机构：

[1] Univ Warsaw, Dept Chem, PL-02093 Warsaw, Poland

来源：

SURFACE SCIENCE | 2002年 / 502卷

关键词：

Raman scattering spectroscopy; self-assembly; silver; carboxylic acid;

D O I：

10.1016/S0039-6028(01)01947-1

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 pH on the structure of 3-mercaptopropionic acid (MPA) monolayers on silver, and the changes in the structure of monolayers during adsorption and desorption of MPA molecules were investigated by surface-enhanced Raman scattering. The measurements were carried out in aqueous solutions. It was demonstrated that during the self-assembling of the monolayer there was a significant increase in the portion of a trans conformer of S-C-C chains of adsorbed MPA molecules, and a large portion of the COO- groups of the adsorbed MPA molecules was protonated. The strength of adsorbed acid clearly depends on its surface concentration. Desorption of MPA progressed at a slow rate and significant changes (reverse to the changes during adsorption) were observed after more than I h. (C) 2002 Elsevier Science B.V. All rights reserved.

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页码：219 / 223

页数：5

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