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Issue 54, 2020
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On-surface synthesis of super-heptazethrene

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Zethrenes are model diradicaloids with potential applications in spintronics and optoelectronics. Despite a rich chemistry in solution, on-surface synthesis of zethrenes has never been demonstrated. We report the on-surface synthesis of super-heptazethrene on Au(111). Scanning tunneling spectroscopy investigations reveal that super-heptazethrene exhibits an exceedingly low HOMO–LUMO gap of 230 meV and, in contrast to its open-shell singlet ground state in the solution phase and in the solid-state, likely adopts a closed-shell ground state on Au(111).

Graphical abstract: On-surface synthesis of super-heptazethrene

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Article information

08 Apr 2020
22 May 2020
First published
29 May 2020

Chem. Commun., 2020,56, 7467-7470
Article type

On-surface synthesis of super-heptazethrene

S. Mishra, J. Melidonie, K. Eimre, S. Obermann, O. Gröning, C. A. Pignedoli, P. Ruffieux, X. Feng and R. Fasel, Chem. Commun., 2020, 56, 7467
DOI: 10.1039/D0CC02513E

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