Abstract
We have investigated the interaction of acetone with a Au(1 1 1) surface by use of temperature programmed desorption (TPD) and infrared reflection-absorption spectroscopy (IRAS). We find that acetone reversibly adsorbs on Au(1 1 1), with thermal desorption peaks at 160, 137 and 132 K corresponding to acetone desorption from the monolayer, second layer and multilayer, respectively. IRAS data is used to establish that chemisorbed acetone molecules bind to the Au(1 1 1) surface through the oxygen atom in a η1-(O) configuration with the molecular plane tilted with respect to the surface plane to give C1 symmetry at submonolayer and monolayer coverage. In multilayer films, acetone molecules adopt a highly ordered orientation with the molecular plane perpendicular to the metal surface and the C = O bond nearly parallel to the surface plane to give Cs symmetry.
Original language | English (US) |
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Pages (from-to) | 53-60 |
Number of pages | 8 |
Journal | Surface Science |
Volume | 498 |
Issue number | 1-2 |
DOIs | |
State | Published - Feb 1 2002 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry
Keywords
- Gold
- Infrared absorption spectroscopy
- Ketones
- Thermal desorption
- Vibrations of adsorbed molecules