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Donor-acceptor electron transport mediated by solitons.

Brizhik, L. and Piette, B.M.A.G. and Zakrzewski, W.J. (2014) 'Donor-acceptor electron transport mediated by solitons.', Physical review E., 90 (5). 052915.


We study the long-range electron and energy transfer mediated by solitons in a quasi-one-dimensional molecular chain (conjugated polymer, alpha-helical macromolecule, etc.) weakly bound to a donor and an acceptor. We show that for certain sets of parameter values in such systems an electron, initially located at the donor molecule, can tunnel to the molecular chain, where it becomes self-trapped in a soliton state, and propagates to the opposite end of the chain practically without energy dissipation. Upon reaching the end, the electron can either bounce back and move in the opposite direction or, for suitable parameter values of the system, tunnel to the acceptor. We estimate the energy efficiency of the donor-acceptor electron transport depending on the parameter values. Our calculations show that the soliton mechanism works for the parameter values of polypeptide macromolecules and conjugated polymers. We also investigate the donor-acceptor electron transport in thermalized molecular chains.

Item Type:Article
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Publisher statement:Reprinted with permission from the American Physical Society: Brizhik, L. S., Piette, B. M. A. G. and Zakrzewski, W. J. (2014) 'Donor-acceptor electron transport mediated by solitons.', Physical review E, 90 (5): 052915. © 2014 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:19 September 2014
Date deposited:08 December 2014
Date of first online publication:17 November 2014
Date first made open access:No date available

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