Tailoring Bond Topologies in Open-Shell Graphene Nanostructures

Mishra S, Lohr TG, Pignedoli CA, Liu J, Berger R, Urgel JI, Muellen K, Feng X, Ruffieux P, Fasel R (2018)

Publication Type: Journal article

Publication year: 2018

Journal

ACS nano American Chemical Society

Book Volume: 12

Pages Range: 11917-11927

Journal Issue: 12

DOI: 10.1021/acsnano.8b07225

Abstract

Polycyclic aromatic hydrocarbons exhibit a rich spectrum of physicochemical properties depending on the size and, more critically, on the edge and bond topologies. Among them, open-shell systems - molecules hosting unpaired electron densities - represent an important class of materials for organic electronic, spintronic, and optoelectronic devices, but remain challenging to synthesize in solution. We report the on-surface synthesis and scanning tunneling microscopy- and spectroscopy-based study of two ultralow-gap open-shell molecules, namely peri-tetracene, a benzenoid graphene fragment with zigzag edge topology, and dibenzo[a,m]dicyclohepta[bcde,nopq]rubicene, a nonbenzenoid nonalternant structural isomer of peri-tetracene with two embedded azulene units. Our results provide an understanding of the ramifications of altered bond topologies at the single-molecule scale, with the prospect of designing functionalities in carbon-based nanostructures via engineering of bond topology.

Involved external institutions

Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa) / Swiss Federal Laboratories for Materials Science & Technology CH Switzerland (CH) Technische Universität Dresden DE Germany (DE) Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research DE Germany (DE)

How to cite

APA:

Mishra, S., Lohr, T.G., Pignedoli, C.A., Liu, J., Berger, R., Urgel, J.I.,... Fasel, R. (2018). Tailoring Bond Topologies in Open-Shell Graphene Nanostructures. ACS nano, 12(12), 11917-11927. https://doi.org/10.1021/acsnano.8b07225

MLA:

Mishra, Shantanu, et al. "Tailoring Bond Topologies in Open-Shell Graphene Nanostructures." ACS nano 12.12 (2018): 11917-11927.

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