期刊
CHEMICAL PHYSICS LETTERS
卷 483, 期 1-3, 页码 84-89出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2009.10.056
关键词
-
资金
- National Science Foundation
- Department of Energy [DOE-BES DE-FG0204ER15495]
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.
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