High conductance values in π-folded molecular junctions.

Abstract:

:Folding processes play a crucial role in the development of function in biomacromolecules. Recreating this feature on synthetic systems would not only allow understanding and reproducing biological functions but also developing new functions. This has inspired the development of conformationally ordered synthetic oligomers known as foldamers. Herein, a new family of foldamers, consisting of an increasing number of anthracene units that adopt a folded sigmoidal conformation by a combination of intramolecular hydrogen bonds and aromatic interactions, is reported. Such folding process opens up an efficient through-space charge transport channel across the interacting anthracene moieties. In fact, single-molecule conductance measurements carried out on this series of foldamers, using the scanning tunnelling microscopy-based break-junction technique, reveal exceptionally high conductance values in the order of 10-1 G0 and a low length decay constant of 0.02 Å-1 that exceed the values observed in molecular junctions that make use of through-space charge transport pathways.

journal_name

Nat Commun

journal_title

Nature communications

authors

Carini M,Ruiz MP,Usabiaga I,Fernández JA,Cocinero EJ,Melle-Franco M,Diez-Perez I,Mateo-Alonso A

doi

10.1038/ncomms15195

subject

Has Abstract

pub_date

2017-05-18 00:00:00

pages

15195

issn

2041-1723

pii

ncomms15195

journal_volume

8

pub_type

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