Collision-induced predissociation in the gas phase. Photolysis of methanol at 1849 Å
| Autor: | C. Vermeil, P. C. Roberge, J. Hagege |
|---|---|
| Rok vydání: | 1968 |
| Předmět: |
Absorption spectroscopy
Photodissociation General Engineering General Physics and Astronomy Quantum yield Collision Gas phase chemistry.chemical_compound symbols.namesake chemistry Chemical physics Polarizability Physics::Atomic and Molecular Clusters symbols Methanol Physics::Chemical Physics Physical and Theoretical Chemistry van der Waals force Atomic physics |
| Zdroj: | Trans. Faraday Soc.. 64:3288-3299 |
| ISSN: | 0014-7672 |
| DOI: | 10.1039/tf9686403288 |
| Popis: | The methanol photodecomposition quantum yield increases with the addition of different foreign gases (alkanes, rare gases, CO2, SF6). Whereas the methanol absorption spectrum presents a continuum in the 1850 A region, the added gas effect implies that collisions are involved in reaching the dissociative state. This apparent contradiction between photochemical and spectroscopic data leads to the postulate of the existence of a collision-induced predissociation. The efficiency of the different gases in promoting the predissociation correlates with their polarizability. In absence of spin-orbit coupling, the collision-induced predissociationc an be explained on the basis of a van der Waals interaction. With Kr and Xe as added gases, spin-orbit coupling is an additional dissociative channel. |
| Databáze: | OpenAIRE |
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