Quenching and photobleaching of excited polycyclic aromatic hydrocarbons by carbon tetrachloride
β Scribed by M.V. Encinas; M.A. Rubio; E.A. Lissi
- Publisher
- Elsevier Science
- Year
- 1982
- Weight
- 890 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0047-2670
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π SIMILAR VOLUMES
Quenching of aromatic excited singlet states (9,10-dimethyl anthracene, 9,10-diphenyl anthracene and perylene) by nitroxyl radical was studied by flash photolysis and fluorimetrically. It is established that the dominant quenching mechanism is enhanced intersystem crossing in the collision complex w
Rate constants of tluorescence quenching by electron acceptors are greater for altemant than for non-altemant hydrocarbons with equal E,-o. The reverse is true for quenching by electron donors. This is consistent with the towering of the worbital ener&s of non-altemant compared to aftemant polycycti