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Updated: Oct 19, 2025

Preparation of Carbon Nanosheets at Room Temperature
Published on: March 8, 2016
Synthesis and Chiral Resolution of Twisted Carbon Nanobelts
Wei Fan1, Taisuke Matsuno2, Yi Han1
1Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore.
Abstract:
Twisted carbon nanobelts could display persistent chirality, which is desirable for material applications, but their synthesis is very challenging. Herein, we report the successful synthesis and chiral resolution of such a kind of molecules (1-H and 1) with a figure-eight configuration. 1-H was synthesized first by macrocyclization through Suzuki coupling reaction followed by benzannulation via Bi(OTf)3-mediated cyclization reaction of vinyl ether. Oxidative dehydrogenation of 1-H gave the fully π-conjugated 1. Their twisted structures were confirmed by X-ray crystallographic analysis and calculations, and they can be resolved by chiral high-performance liquid chromatography. The isolated enantiomers showed persistent chiroptical properties according to the circular dichroism measurements, with moderate |gabs| values (0.0016 for 1-H and 0.005-0.007 for 1). Their photophysical properties were also briefly studied.
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