Jump to main content
Jump to site search

Issue 67, 2017, Issue in Progress
Previous Article Next Article

A controllable mechanistic transition of charge transfer in helical peptides: from hopping to superexchange

Author affiliations

Abstract

Understanding the electronic properties inherent to peptides is crucial for controlling charge transfer, and precursory to the design and fabrication of bio-inspired next generation electronic components. However, to achieve this objective one must first be able to predict and control the associated charge transfer mechanisms. Here we demonstrate for the first time a controllable mechanistic transition in peptides resulting directly from the introduction of a side-bridge. High level computational studies on two similar 310-helical hexapeptides, one further constrained into this geometry by linking the i to i + 3 residues with a lactam side-bridge, highlight the effects of the bridge on electron transfer parameters, i.e. thermodynamic driving forces, reorganization energies, and electronic coupling factors. The additional backbone rigidity imparted by the bridge significantly alters the molecular dynamics of the peptide to such an extent as to induce a mechanistic transition from hopping in the linear peptide, to superexchange in the constrained peptide. This exciting finding not only advances our fundamental knowledge of the mechanisms governing charge transfer in peptides, but also reveals novel approaches to design and develop new functional devices that are tailored for applications in molecular electronics.

Graphical abstract: A controllable mechanistic transition of charge transfer in helical peptides: from hopping to superexchange

Back to tab navigation

Publication details

The article was received on 14 Jul 2017, accepted on 28 Aug 2017 and first published on 01 Sep 2017


Article type: Paper
DOI: 10.1039/C7RA07753J
Citation: RSC Adv., 2017,7, 42370-42378
  • Open access: Creative Commons BY-NC license
  •   Request permissions

    A controllable mechanistic transition of charge transfer in helical peptides: from hopping to superexchange

    J. Yu, J. R. Horsley and A. D. Abell, RSC Adv., 2017, 7, 42370
    DOI: 10.1039/C7RA07753J

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements