Mechanically Induced Single-molecule Helicity Switching of Graphene-Nanoribbon-fused Helicene on Au(111)

Abstract

Helicene is a functional material with chirality caused by its characteristic helical geometry. The inversion of its helicity by external stimuli is a challenging task in the advanced control of the molecular chirality. This study fabricated a novel helical molecule, specifically a pentahelicene-analogue twisted aromatic hydrocarbon fused with a graphene nanoribbon, via on-surface synthesis using multiple precursors. Noncontact atomic force microscopy imaging with high spatial resolution confirmed the helicity of the reaction products. The helicity was geometrically converted by pushing a CO-terminated tip into the twisted framework, which is the first demonstration of helicity switching at the single-molecule scale.

Supplementary files

Article information

Article type
Edge Article
Submitted
20 Jul 2021
Accepted
13 Sep 2021
First published
14 Sep 2021
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2021, Accepted Manuscript

Mechanically Induced Single-molecule Helicity Switching of Graphene-Nanoribbon-fused Helicene on Au(111)

A. Ishii, A. Shiotari and Y. Sugimoto, Chem. Sci., 2021, Accepted Manuscript , DOI: 10.1039/D1SC03976H

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