Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/10413
Title: Long Range Electron Transfer Quenching in Polyamine Chains Bearing a Terminal Naphthalene Unit
Authors: Pina, Fernando 
Lima, J. C. 
Lodeiro, Carlos 
Melo, J. Seixas de 
Díaz, Pilar 
Teresa Albelda, M. 
García-España, Enrique 
Issue Date: 5-Sep-2002
Publisher: American Chemical Society
Citation: The Journal of Physical Chemistry A. 106:35 (2002) 8207-8212
Abstract: 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.
URI: http://hdl.handle.net/10316/10413
ISSN: 1089-5639
DOI: 10.1021/jp025848j
Rights: openAccess
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais

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