Mechanically induced single-molecule helicity switching of 
graphene-nanoribbon-fused helicene on Au(111)

Ishii, Ayumu; Shiotari, Akitoshi; Sugimoto, Yoshiaki

doi:10.1039/d1sc03976h

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Mechanically induced single-molecule helicity switching of graphene-nanoribbon-fused helicene on Au(111)

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Shiotari, Akitoshi
Department of Advanced Materials Science, The University of Tokyo;
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Ishii, A., Shiotari, A., & Sugimoto, Y. (2021). Mechanically induced single-molecule helicity switching of graphene-nanoribbon-fused helicene on Au(111). Chemical Science, 12(40), 13301-13306. doi:10.1039/d1sc03976h.

Cite as: https://hdl.handle.net/21.11116/0000-0009-5136-F

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.