Excitation energy dependence of the quantum yields of fluorescence and electron formation from aqueous phenol by means of the heavy atom effect
✍ Scribed by J. Zechner; G. Köhler; G. Grabner; N. Getoff
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 387 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The formation of hydrated electrons and H atoms from phenol in neutral aqueous solutions has been studied by cxcitation in its first and second excited singlet state. The quantum yields of both H and c;q show a strong increase at higher cxcitation energies. However, this increase cannot fully eccount for the corresponding decresse of the fluorcscencc quantum yieid. Using Cs* as a heavy atom quencher, it could be shown that there are at lcasi two pathways for elcctron,formation, one in competition to internal conversion to the fluorescing state and another occurring after population of the fluorescing state, but most likely not from the triplet state.