Initial Reaction Probability and Dynamics of Ozone Collisions with a Vinyl-Terminated Self-Assembled Monolayer
| Autor: | Jessica W. Lu, William A. Alexander, John R. Morris, Larry R. Fiegland, Richard D. Gandour, Erin Durke Davis, Alec Wagner |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Ozone Double bond Infrared spectroscopy Self-assembled monolayer Photochemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound General Energy Adsorption chemistry Reaction dynamics Ozonide Physical and Theoretical Chemistry Molecular beam |
| Zdroj: | The Journal of Physical Chemistry C. 115:25343-25350 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp2079692 |
| Popis: | The gas–surface reaction dynamics of ozone with a model unsaturated organic surface have been explored through a series of molecular beam scattering experiments. Well-characterized organic surfaces were reproducibly created by adsorption of C═C-terminated long-chain alkanethiols onto gold, while the incident molecular beams were created by supersonic expansion of ozone seeded in an inert carrier gas to afford control over collision energy. Time-of-flight distributions for the scattered molecules showed near complete thermal accommodation of ozone for incident energies as high as 70 kJ/mol. Reflection–absorption infrared spectroscopy, performed in situ with ozone exposure, revealed that oxidation of the double bond depends significantly on the translational energy of O3. For energies near room temperature, 5 kJ/mol, the initial reaction probability (γ0) for the formation of the primary ozonide was determined to be γ0 = 1.1 × 10–5. As translational energy increased to 20 kJ/mol, the reaction probability dec... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|