Exploring Intramolecular Methyl–Methyl Coupling on a Metal Surface for Edge-Extended Graphene Nanoribbons

Abstract

Intramolecular methyl–methyl coupling on Au (111) is explored as a new on-surface protocol for edge extension in graphene nanoribbons (GNRs). Characterized by high-resolution scanning tunneling microscopy, noncontact atomic force microscopy, and Raman spectroscopy, the methyl–methyl coupling is proven to indeed proceed at the armchair edges of the GNRs, forming six-membered rings with sp³- or sp²-hybridized carbons.

Key words

graphene nanoribbons - surface chemistry - edge extension - methyl–methyl coupling

Supporting Information

Supporting information for this article is available online at: https://doi.org/10.1055/s-0041-1726295.

^# These authors contributed equally to this work.

This paper is dedicated to Professor Peter Bäuerle on the occasion of his 65^th birthday.

Publikationsverlauf

Eingereicht: 16. Januar 2021

Angenommen: 17. Februar 2021

Artikel online veröffentlicht:
01. April 2021

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