High conductance values in π-folded molecular junctions

Nature Communications
Marco CariniAurelio Mateo-Alonso

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.

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Citations

Nov 18, 2017·Chemical Science·Alejandro Méndez-ArdoyDario M Bassani
Feb 6, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Torben Jasper-TönniesRichard Berndt
Aug 14, 2019·Chemical Communications : Chem Comm·Joan AtcherIvan Huc
Sep 13, 2019·Angewandte Chemie·Marco CariniAurelio Mateo-Alonso
Mar 15, 2019·IUCrJ·Krešimir Molčanov, Biserka Kojić-Prodić
Apr 19, 2019·Chemical Science·Cristian GozalvezAurelio Mateo-Alonso
May 24, 2020·Nanomaterials·Neethu NinanKrasimir Vasilev
Oct 26, 2018·Journal of the American Chemical Society·Yanxi ZhangRyan C Chiechi
Oct 2, 2021·Advanced Materials·Sheng-Yi YangShuit-Tong Lee

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Methods Mentioned

BETA
nuclear magnetic resonance
X-ray
NMR
Fluorescence

Software Mentioned

Crysalis
LabVIEW
WinGX
97
Gaussian
Mercury
SHELXL
PLATON
Orca
Tinker

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