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https://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: | https://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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Long Range Electron Transfer Quenching in Polyamine Chains.pdf | 159.03 kB | Adobe PDF | View/Open |
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