Donor-acceptor electron transport mediated by solitons

Brizhik, L.; Piette, B.M.A.G.; Zakrzewski, W.J.

Abstract

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.

Citation

Brizhik, L., Piette, B., & Zakrzewski, W. (2014). Donor-acceptor electron transport mediated by solitons. Physical review E: Statistical, nonlinear, and soft matter physics, 90(5), Article 052915. https://doi.org/10.1103/physreve.90.052915

• Journal Article Type: Article
• Acceptance Date: Sep 19, 2014
• Online Publication Date: Nov 17, 2014
• Publication Date: Nov 17, 2014
• Deposit Date: Dec 8, 2014
• Publicly Available Date: Dec 8, 2014
• Journal: Physical review . E, Statistical, nonlinear, and soft matter physics
• Print ISSN: 1539-3755
• Electronic ISSN: 1550-2376
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 90
• Issue: 5
• Article Number: 052915
• DOI: https://doi.org/10.1103/physreve.90.052915
• Public URL: https://durham-repository.worktribe.com/output/1418898