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Issue 36, 2019

Unravelling the conductance path through single-porphyrin junctions

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Abstract

Porphyrin derivatives are key components in natural machinery enabling us to store sunlight as chemical energy. In spite of their prominent role in cascades separating electrical charges and their potential as sensitizers in molecular devices, reports concerning their electronic transport characteristics are inconsistent. Here we report a systematic investigation of electronic transport paths through single porphyrin junctions. The transport through seven structurally related porphyrin derivatives was repeatedly measured in an automatized mechanically controlled break-junction set-up and the recorded data were analyzed by an unsupervised clustering algorithm. The correlation between the appearances of similar clusters in particular sub-sets of the porphyrins with a common structural motif allowed us to assign the corresponding current path. The small series of model porphyrins allowed us to identify and distinguish three different electronic paths covering more than four orders of magnitude in conductance.

Graphical abstract: Unravelling the conductance path through single-porphyrin junctions

Supplementary files

Article information


Submitted
22 May 2019
Accepted
30 Jul 2019
First published
31 Jul 2019

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2019,10, 8299-8305
Article type
Edge Article

Unravelling the conductance path through single-porphyrin junctions

M. El Abbassi, P. Zwick, A. Rates, D. Stefani, A. Prescimone, M. Mayor, H. S. J. van der Zant and D. Dulić, Chem. Sci., 2019, 10, 8299 DOI: 10.1039/C9SC02497B

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