Water, chloroform, acetonitrile, and atrazine adsorption to the amorphous silica surface studied by vibrational sum frequency generation spectroscopy

被引：31

作者：

Casillas-Ituarte, Nadia N. ^{[1
]}

Allen, Heather C. ^{[1
]}

机构：

[1] Ohio State Univ, Dept Chem, Columbus, OH 43210 USA

来源：

CHEMICAL PHYSICS LETTERS | 2009年 / 483卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

HYDROXYL-GROUPS; ADSORBED WATER; INTERFACE; OXIDE; ACID; MOLECULES; SPECTRA; MODEL; DEHYDROXYLATION; COMPLEXATION;

D O I：

10.1016/j.cplett.2009.10.056

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：

Vibrational sum frequency generation (VSFG) spectroscopy was used to examine the air-silica interface before, during, and after adsorption of water, chloroform, acetonitrile, and atrazine, an s-triazine molecule. Adsorption via the surface silanol sites was observed for all the compounds. Adsorption of chloroform and acetonitrile was weaker compared to water. Binding to the surface silanol groups was observed to be reversible for chloroform, acetonitrile, and atrazine. The standard free energy of adsorption, Delta G degrees(abs), of atrazine to the silica surface was determined to be -35 kJ/mol at 23 degrees C. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：84 / 89

页数：6

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