Unravelling the conductance path through single-porphyrin junctions

Maria El Abbassi, Patrick Zwick, Alfredo Rates, Davide Stefani, Alessandro Prescimone, Marcel Mayor*, Herre S.J. Van Der Zant, Diana Dulić

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

22 Citations (Scopus)
50 Downloads (Pure)


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.

Original languageEnglish
Pages (from-to)8299-8305
Number of pages7
JournalChemical Science
Issue number36
Publication statusPublished - 2019


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