Cove-Edged Graphene Nanoribbons with Incorporation of Periodic Zigzag-Edge Segments
Wang X, Ma J, Zheng W, Osella S, Arisnabarreta N, Droste J, Serra G, Ivasenko O, Lucotti A, Beljonne D, Bonn M, Liu X, Hansen MR, Tommasini M, De Feyter S, Liu J, Wang H, Feng X (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Book Volume: 144
Pages Range: 228-235
Journal Issue: 1
DOI: 10.1021/jacs.1c09000
Abstract
Structurally precision graphene nanoribbons (GNRs) are promising candidates for next-generation nanoelectronics due to their intriguing and tunable electronic structures. GNRs with hybrid edge structures often confer them unique geometries associated with exotic physicochemical properties. Herein, a novel type of cove-edged GNRs with periodic short zigzag-edge segments is demonstrated. The bandgap of this GNR family can be tuned using an interplay between the length of the zigzag segments and the distance of two adjacent cove units along the opposite edges, which can be converted from semiconducting to nearly metallic. A family member with periodic cove-zigzag edges based on N = 6 zigzag-edged GNR, namely 6-CZGNR-(2,1), is successfully synthesized in solution through the Scholl reaction of a unique snakelike polymer precursor (10) that is achieved by the Yamamoto coupling of a structurally flexible S-shaped phenanthrene-based monomer (1). The efficiency of cyclodehydrogenation of polymer 10 toward 6-CZGNR-(2,1) is validated by FT-IR, Raman, and UV-vis spectroscopies, as well as by the study of two representative model compounds (2 and 3). Remarkably, the resultant 6-CZGNR-(2,1) exhibits an extended and broad absorption in the near-infrared region with a record narrow optical bandgap of 0.99 eV among the reported solution-synthesized GNRs. Moreover, 6-CZGNR-(2,1) exhibits a high macroscopic carrier mobility of ∼20 cm2 V-1 s-1 determined by terahertz spectroscopy, primarily due to the intrinsically small effective mass (m*e = m*h = 0.17 m0), rendering this GNR a promising candidate for nanoelectronics.
Involved external institutions
Sichuan University (SCU) / 四川大学
China (CN)
Technische Universität Dresden
Germany (DE)
Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research
Germany (DE)
University of Warsaw / Uniwersytet Warszawski
Poland (PL)
Katholieke Universiteit Leuven (KUL) / Catholic University of Leuven
Belgium (BE)
Westfälische Wilhelms-Universität (WWU) Münster
Germany (DE)
Politecnico di Milano
Italy (IT)
University of Mons / Université de Mons
Belgium (BE)
University of Hong Kong (HKU) / 香港大學
Hong Kong (HK)
China (CN)
Technische Universität Dresden
Germany (DE)
Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research
Germany (DE)
University of Warsaw / Uniwersytet Warszawski
Poland (PL)
Katholieke Universiteit Leuven (KUL) / Catholic University of Leuven
Belgium (BE)
Westfälische Wilhelms-Universität (WWU) Münster
Germany (DE)
Politecnico di Milano
Italy (IT)
University of Mons / Université de Mons
Belgium (BE)
University of Hong Kong (HKU) / 香港大學
Hong Kong (HK)
How to cite
APA:
Wang, X., Ma, J., Zheng, W., Osella, S., Arisnabarreta, N., Droste, J.,... Feng, X. (2022). Cove-Edged Graphene Nanoribbons with Incorporation of Periodic Zigzag-Edge Segments. Journal of the American Chemical Society, 144(1), 228-235. https://doi.org/10.1021/jacs.1c09000
MLA:
Wang, Xu, et al. "Cove-Edged Graphene Nanoribbons with Incorporation of Periodic Zigzag-Edge Segments." Journal of the American Chemical Society 144.1 (2022): 228-235.
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