Graphene-Like Covalent Organic Framework with a Wide Band Gap Synthesized On Surface via Stepwise Reactions

Guoqiang Shi; Junfeng Zhou; Zhuo Li; Ye Sun; Lev N. Kantorovich; Qiang Fang; Flemming Besenbacher; Miao Yu

doi:10.1002/anie.202006176

Graphene-Like Covalent Organic Framework with a Wide Band Gap Synthesized On Surface via Stepwise Reactions

Guoqiang Shi, Junfeng Zhou, Zhuo Li, Ye Sun, Lev N. Kantorovich, Qiang Fang, Flemming Besenbacher, Miao Yu^*

^*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

17 Citationer (Scopus)

Abstract

Developing graphene-like two-dimensional materials naturally possessing a band gap has sparked enormous interest. Thanks to the inherent wide band gap and high mobility in the 2D plane, covalent organic frameworks containing triazine rings (t-COFs) hold great promise in this regard, whilst the synthesis of single-layer t-COFs remains highly challenging. Herein, we present the fabrication of a well-defined graphene-like t-COF on Au(111). Instead of single/multiple-step single-type reactions commonly applied for on-surface synthesis, distinct stepwise on-surface reactions, including alkynyl cyclotrimerization, C−O bond cleavage, and C−H bond activation, are triggered on demand, leading to product evolution in a controlled step-by-step manner. Aside from the precise control in sophisticated on-surface synthesis, this work proposes a single-atomic-layer organic semiconductor with a wide band gap of 3.41 eV.

Originalsprog	Engelsk
Tidsskrift	Angewandte Chemie - International Edition
Vol/bind	59
Nummer	37
Sider (fra-til)	15958-15962
Antal sider	5
ISSN	1433-7851
DOI	https://doi.org/10.1002/anie.202006176
Status	Udgivet - sep. 2020

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abstract = "Developing graphene-like two-dimensional materials naturally possessing a band gap has sparked enormous interest. Thanks to the inherent wide band gap and high mobility in the 2D plane, covalent organic frameworks containing triazine rings (t-COFs) hold great promise in this regard, whilst the synthesis of single-layer t-COFs remains highly challenging. Herein, we present the fabrication of a well-defined graphene-like t-COF on Au(111). Instead of single/multiple-step single-type reactions commonly applied for on-surface synthesis, distinct stepwise on-surface reactions, including alkynyl cyclotrimerization, C−O bond cleavage, and C−H bond activation, are triggered on demand, leading to product evolution in a controlled step-by-step manner. Aside from the precise control in sophisticated on-surface synthesis, this work proposes a single-atomic-layer organic semiconductor with a wide band gap of 3.41 eV.",

keywords = "covalent organic frameworks, on-surface synthesis, stepwise reactions, triazine",

author = "Guoqiang Shi and Junfeng Zhou and Zhuo Li and Ye Sun and Kantorovich, {Lev N.} and Qiang Fang and Flemming Besenbacher and Miao Yu",

year = "2020",

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Graphene-Like Covalent Organic Framework with a Wide Band Gap Synthesized On Surface via Stepwise Reactions. / Shi, Guoqiang; Zhou, Junfeng; Li, Zhuo et al.
I: Angewandte Chemie - International Edition, Bind 59, Nr. 37, 09.2020, s. 15958-15962.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

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AU - Shi, Guoqiang

AU - Zhou, Junfeng

AU - Li, Zhuo

AU - Sun, Ye

AU - Kantorovich, Lev N.

AU - Fang, Qiang

AU - Besenbacher, Flemming

AU - Yu, Miao

PY - 2020/9

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AB - Developing graphene-like two-dimensional materials naturally possessing a band gap has sparked enormous interest. Thanks to the inherent wide band gap and high mobility in the 2D plane, covalent organic frameworks containing triazine rings (t-COFs) hold great promise in this regard, whilst the synthesis of single-layer t-COFs remains highly challenging. Herein, we present the fabrication of a well-defined graphene-like t-COF on Au(111). Instead of single/multiple-step single-type reactions commonly applied for on-surface synthesis, distinct stepwise on-surface reactions, including alkynyl cyclotrimerization, C−O bond cleavage, and C−H bond activation, are triggered on demand, leading to product evolution in a controlled step-by-step manner. Aside from the precise control in sophisticated on-surface synthesis, this work proposes a single-atomic-layer organic semiconductor with a wide band gap of 3.41 eV.

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Graphene-Like Covalent Organic Framework with a Wide Band Gap Synthesized On Surface via Stepwise Reactions

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