| Autor: |
Pina, F., Lima, J. C., Lodeiro, C., Melo, J. Seixas de, Diaz, P., Albelda, M. T., Garcia-Espana, E. |
| Zdroj: |
The Journal of Physical Chemistry - Part A; September 2002, Vol. 106 Issue: 35 p8207-8212, 6p |
| Abstrakt: |
The fluorescence emission of a naphthalene unit attached to a polyamine chain is quenched by intramolecular electron transfer from the deprotonated amines to the excited fluorophore. Measurements of the respective quenching rate constants as a function of the distance, reveal an exponential dependence with β = 0.45 Å-1. Identical measurements carried out in deuterated water have shown a similar dependence with the distance β = 0.49 Å-1 but an average reduction of the absolute values of the rate constants of ca. 1.2. The polyamine chains seem to constitute a bridge through which the electron can find a route to its movement, more efficiently than through space. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
