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アイテム
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On-surface activation of benzylic C-H bonds for the synthesis of pentagon-fused graphene nanoribbons
https://oist.repo.nii.ac.jp/records/2097
https://oist.repo.nii.ac.jp/records/2097415fd96a-8101-4fa6-8508-3a7ed5d17d2c
名前 / ファイル | ライセンス | アクション |
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Xu-2021-On-surface activation of benzylic C-H (2.4 MB)
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Creative Commons Attribution 4.0 International(https://creativecommons.org/licenses/by/4.0/)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-05-18 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | On-surface activation of benzylic C-H bonds for the synthesis of pentagon-fused graphene nanoribbons | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | graphene nanoribbons | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | on-surface synthesis | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | scanning-tunneling microscope | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | noncontact atomic force microscope | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | C–H activation | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者(英) |
Xu, Xiushang
× Xu, Xiushang× Di Giovannantonio, Marco× Urgel, José I.× Pignedoli, Carlo A.× Ruffieux, Pascal× Müllen, Klaus× Fasel, Roman× Narita, Akimitsu |
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書誌情報 |
en : Nano Research 発行日 2021-04-23 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Graphene nanoribbons (GNRs) have potential for applications in electronic devices. A key issue, thereby, is the fine-tuning of their electronic characteristics, which can be achieved through subtle structural modifications. These are not limited to the conventional armchair, zigzag, and cove edges, but also possible through incorporation of non-hexagonal rings. On-surface synthesis enables the fabrication and visualization of GNRs with atomically precise chemical structures, but strategies for the incorporation of non-hexagonal rings have been underexplored. Herein, we describe the on-surface synthesis of armchair-edged GNRs with incorporated five-membered rings through the C-H activation and cyclization of benzylic methyl groups. Ortho-Tolyl-substituted dibromobianthryl was employed as the precursor monomer, and visualization of the resulting structures after annealing at 300 °C on a gold surface by high-resolution noncontact atomic force microscopy clearly revealed the formation of methylene-bridged pentagons at the GNR edges. These persisted after annealing at 340 °C, along with a few fully conjugated pentagons having singly-hydrogenated apexes. The benzylic methyl groups could also migrate or cleave-off, resulting in defects lacking the five-membered rings. Moreover, unexpected and unique structural rearrangements, including the formation of embedded heptagons, were observed. Despite the coexistence of different reaction pathways that hamper selective synthesis of a uniform structure, our results provide novel insights into on-surface reactions en route to functional, non-benzenoid carbon nanomaterials. | |||||
出版者 | ||||||
出版者 | Springer-Verlag | |||||
出版者 | ||||||
出版者 | Tsinghua University Press | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1998-0124 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1998-0000 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1007/s12274-021-3419-2 | |||||
権利 | ||||||
権利情報 | © 2021 The Author(s). | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://link.springer.com/article/10.1007%2Fs12274-021-3419-2 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |