Graphene Nanoribbons Derived from Zigzag Edge-Encased Poly(para-2,9-dibenzo[ bc, kl]coronenylene) Polymer Chains
Beyer D, Wang S, Pignedoli CA, Melidonie J, Yuan B, Li C, Wilhelm J, Ruffieux P, Berger R, Muellen K, Fasel R, Feng X (2019)
Publication Type: Journal article
Publication year: 2019
Journal
DOI: 10.1021/jacs.8b10407
Abstract
In this work, we demonstrate the bottom-up on-surface synthesis of poly(para-dibenzo[bc,kl]-coronenylene) (PPDBC), a zigzag edge-encased analog of poly(para-phenylene) (PPP), and its lateral fusion into zigzag edge-extended graphene nanoribbons (zeeGNRs). Toward this end, we designed a dihalogenated di(meta-xylyl)anthracene monomer displaying strategic methyl groups at the substituted phenyl ring and investigated its applicability as precursor in the thermally induced surface-assisted polymerization and cyclodehydrogenation. The structure of the resulting zigzag edge-rich (70%) polymer PPDBC was unambiguously confirmed by scanning tunneling microscopy (STM) and non-contact atomic force microscopy (nc-AFM). Remarkably, by further thermal treatment at 450 °C two and three aligned PPDBC chains can be laterally fused into expanded zeeGNRs, with a ribbon width of nine (N = 9) up to 17 (N = 17) carbon atoms. Moreover, the resulting zeeGNRs exhibit a high ratio of zigzag (67%) vs armchair (25%) edge segments and feature electronic band gaps as low as 0.9 eV according to gaps quasiparticle calculations.
Involved external institutions
Technische Universität Dresden
Germany (DE)
Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa) / Swiss Federal Laboratories for Materials Science & Technology
Switzerland (CH)
Shanghai Jiao Tong University / 上海交通大学
China (CN)
University of Zurich / Universität Zürich (UZH)
Switzerland (CH)
Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research
Germany (DE)
Germany (DE)
Eidgenössische Materialprüfungs- und Forschungsanstalt (Empa) / Swiss Federal Laboratories for Materials Science & Technology
Switzerland (CH)
Shanghai Jiao Tong University / 上海交通大学
China (CN)
University of Zurich / Universität Zürich (UZH)
Switzerland (CH)
Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research
Germany (DE)
How to cite
APA:
Beyer, D., Wang, S., Pignedoli, C.A., Melidonie, J., Yuan, B., Li, C.,... Feng, X. (2019). Graphene Nanoribbons Derived from Zigzag Edge-Encased Poly(para-2,9-dibenzo[ bc, kl]coronenylene) Polymer Chains. Journal of the American Chemical Society. https://doi.org/10.1021/jacs.8b10407
MLA:
Beyer, Doreen, et al. "Graphene Nanoribbons Derived from Zigzag Edge-Encased Poly(para-2,9-dibenzo[ bc, kl]coronenylene) Polymer Chains." Journal of the American Chemical Society (2019).
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