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Influence of Amino Acid Side Chains on Long‐Distance Electron Transfer in Peptides: Electron Hopping via “Stepping Stones”
Author(s) -
Cordes Meike,
Köttgen Angnieszka,
Jasper Christian,
Jacques Olivier,
Boudebous Hassen,
Giese Bernd
Publication year - 2008
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200705588
Subject(s) - superexchange , electron transfer , electron , side chain , electron acceptor , chemistry , electron transport chain , acceptor , chemical physics , electron mobility , crystallography , materials science , photochemistry , physics , condensed matter physics , polymer , ion , optoelectronics , organic chemistry , biochemistry , quantum mechanics
It works both ways : The mechanism of electron transfer through peptides depends upon the side chain X located between the electron donor and the electron acceptor. Electron transfer occurs either by a slow single‐step superexchange or by a two‐step hopping process that is 20–30‐times faster (see scheme). All intermediates in the hopping process could be observed simultaneously.