THE PHOTO-REACTIVITY OF AROMATIC SUBSTANCES WITH OXYGEN
| Autor: | Jerome L. Rosenberg, Frederick S. Humphries |
|---|---|
| Rok vydání: | 1964 |
| Předmět: |
Quenching (fluorescence)
Chemistry High Energy Physics::Lattice Dimer chemistry.chemical_element General Medicine Photochemistry Biochemistry Oxygen Catalysis Delocalized electron chemistry.chemical_compound Excited state Physics::Atomic and Molecular Clusters Vibrational energy relaxation Reactivity (chemistry) Physics::Chemical Physics Physical and Theoretical Chemistry |
| Zdroj: | Photochemistry and Photobiology. 3:343-348 |
| ISSN: | 1751-1097 0031-8655 |
| DOI: | 10.1111/j.1751-1097.1964.tb08157.x |
| Popis: | Summary The quenching reaction of oxygen with photo-excited aromatics, although almost diffusion-controlled in many cases, has some specific requirements with respect to the electronic details of the excited state. This is shown in the difference between the quenching constants for monomer and dimer of the same dye, where the dimer is recognized principally by excitation delocalization. Evidence is reviewed for the view that oxygen becomes vibrationally excited as a result of the quenching reaction, and that this hot oxygen is an essential intermediate in photo-oxidations. A new result is the stimulation of O2 quenching by CO2, a known catalyst for vibrational relaxation in O2. |
| Databáze: | OpenAIRE |
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