On-surface synthesis of nonbenzenoid nanographenes through skeletal rearrangement reactions on Au(111)
Kewei Sun, Xiushang Xu, Atsushi Ishikawa, Akimitsu Narita, Shigeki Kawai
TL;DR
Scientists synthesized unique carbon nanostructures on a gold surface using skeletal rearrangement, creating nanographenes with varied properties.
Contribution
The study demonstrates the on-surface synthesis of closed-shell and open-shell nonbenzenoid nanographenes via skeletal rearrangement.
Findings
Five closed-shell and two open-shell nanographenes were formed on Au(111) through carbon rearrangements.
Zigzag edges and fused pentagonal rings significantly influence band gap and spin polarization.
Bond-resolved scanning tunneling microscopy and DFT calculations revealed structural and electronic properties.
Abstract
Skeletal rearrangement reaction is a class of important chemical reactions to synthesize various constitutional isomers from a given precursor molecule. This approach allows the synthesis of diverse nanographenes incorporating five- and seven-membered rings, thereby tuning their chemical and physical properties. Here, we present formation of five types of closed-shell and two types of open-shell nanographenes on Au(111) via carbon rearrangements of 7-(2,6-dimethylphenyl)-12-[10-(2,6-dimethylphenyl)anthracen-9-yl]tetraphene. The structural, electronic, and magnetic properties of various products composed of pentagonal or pentagonal/heptagonal rings were in-detail investigated with a combination of bond-resolved scanning tunneling microscopy/scanning tunneling spectroscopy at 4.3 K and density functional theory calculations. We found that both zigzag edges and fused pentagonal rings…
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Taxonomy
TopicsSurface Chemistry and Catalysis · Synthesis and Properties of Aromatic Compounds · Graphene research and applications