The rate constant of intramolecular electron transfer through oligopeptides based on the alpha-aminoisobutyric acid residue was determined as a function of the peptide length and found to depend weakly on the donor−acceptor separation. By measuring the electron-transfer activation energy and estimating the energy gap between donor and bridge, we were able to discard the electron hopping mechanism.
Evidence against the Hopping Mechanism as an Important Electron Transfer Pathway for Constrained Oligopetides
POLO, FEDERICO;ANTONELLO, SABRINA;FORMAGGIO, FERNANDO;TONIOLO, CLAUDIO;MARAN, FLAVIO
2005
Abstract
The rate constant of intramolecular electron transfer through oligopeptides based on the alpha-aminoisobutyric acid residue was determined as a function of the peptide length and found to depend weakly on the donor−acceptor separation. By measuring the electron-transfer activation energy and estimating the energy gap between donor and bridge, we were able to discard the electron hopping mechanism.
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Maran_Evidence against the hopping mechanism_ JACS 2006.pdf
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