Redox-Addressable Single-Molecule Junctions Incorporating a Persistent Organic Radical**

Saman Naghibi, Sara Sangtarash, Varshini J. Kumar, Jian Zhong Wu, Martyna M. Judd, Xiaohang Qiao, Elena Gorenskaia, Simon J. Higgins, Nicholas Cox, Richard J. Nichols*, Hatef Sadeghi*, Paul J. Low*, Andrea Vezzoli*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Integrating radical (open-shell) species into non-cryogenic nanodevices is key to unlocking the potential of molecular electronics. While many efforts have been devoted to this issue, in the absence of a chemical/electrochemical potential the open-shell character is generally lost in contact with the metallic electrodes. Herein, single-molecule devices incorporating a 6-oxo-verdazyl persistent radical have been fabricated using break-junction techniques. The open-shell character is retained at room temperature, and electrochemical gating permits in situ reduction to a closed-shell anionic state in a single-molecule transistor configuration. Furthermore, electronically driven rectification arises from bias-dependent alignment of the open-shell resonances. The integration of radical character, transistor-like switching, and rectification in a single molecular component paves the way to further studies of the electronic, magnetic, and thermoelectric properties of open-shell species.

Original languageEnglish
Article numbere202116985
JournalAngewandte Chemie - International Edition
Volume61
Issue number23
DOIs
Publication statusPublished - 7 Jun 2022

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