On-surface synthesis of hydroxy-functionalized graphene nanoribbons through deprotection of methylenedioxy groups

Ohtomo, Manabu; Hayashi, Hironobu; Shiotari, Akitoshi; Kawamura, Makiko; Hayashi, Ryunosuke; Jippo, Hideyuki; Yamaguchi, Junichi; Ohfuchi, Mari; Aratani, Naoki; Sugimoto, Yoshiaki; Yamada, Hiroko; Sato, Shintaro

doi:10.1039/d2na00031h

Cited by 1 publication

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“…Note that the GNR repulsion does not occur in the case of heteroatomfunctionalized GNRs at their edges. 37,38,77 Finally, due to the repulsive interaction appearing during the GNR formation, lateral fusion of the GNR is made very difficult and can be observed only scarcely (Figure 5b and Supporting Information Figure S5). 24 The full cyclodehydrogenation occurs first at the domain boundaries where the newly formed GNR can diffuse freely and withdraw from the domains, thus strongly restraining the possibility for a fusion reaction.…”

Section: ■ Resultsmentioning

confidence: 99%

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Growth Mechanism of Chevron Graphene Nanoribbons on (111)-Oriented Coinage Metal Surfaces

Geagea,

Medina-Lopez,

Giovanelli

et al. 2024

J. Phys. Chem. C

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Atomically precise on-surface synthesis of graphene nanoribbons (GNRs) with well-defined width and edge configuration has been widely advanced during the past decade. The main bottom-up growth strategy relies on the thermally activated Ullmann-like coupling reaction followed by the cyclodehydrogenation of tailor-made precursors to achieve the desired precision. We present a systematic investigation of the growth mechanism of chevron GNR on the Ag(111), Au(111), and Cu(111) surfaces in ultrahigh vacuum. We found that the multistep reaction follows different pathways with different activation temperatures depending on the supporting surface. The importance of the as-released Br and their potential influence on the growth process are discussed. The different intermediate states were investigated by lowtemperature scanning tunneling microscopy in combination with thermal desorption spectroscopy and kinetic Monte Carlo simulations.

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Section: ■ Resultsmentioning

confidence: 99%

“…When added along the full GNR length, the electrostatic interaction easily reaches the order of magnitude of the friction force. Note that the GNR repulsion does not occur in the case of heteroatom-functionalized GNRs at their edges. ,, …”

Section: Resultsmentioning

confidence: 99%

Growth Mechanism of Chevron Graphene Nanoribbons on (111)-Oriented Coinage Metal Surfaces

Geagea,

Medina-Lopez,

Giovanelli

et al. 2024

J. Phys. Chem. C

View full text Add to dashboard Cite

show abstract

On-surface synthesis of hydroxy-functionalized graphene nanoribbons through deprotection of methylenedioxy groups

Abstract: We demonstrate on-surface deprotection of methylenedioxy groups which yielded graphene nanoribbons (GNRs) with edges functionalized by hydroxy groups. While anthracene trimer precursors functionalized with hydroxy groups did not yield GNRs,...

Cited by 1 publication

References 51 publications

Growth Mechanism of Chevron Graphene Nanoribbons on (111)-Oriented Coinage Metal Surfaces

Growth Mechanism of Chevron Graphene Nanoribbons on (111)-Oriented Coinage Metal Surfaces

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