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Updated: Mar 10, 2026

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
Published on: March 4, 2021
Asymmetric Saddle-Shaped Nanographenes Integrating Helicene and Heptagon Motifs: Synthesis and Chiroptical Properties
Jiawei Gao1, Guofeng Chen1, Chengxiu Wang1
1College of Chemistry and Materials Science, Hebei University, Baoding 071002, P. R. China.
Abstract:
Three curved heptagon-embedded nanographenes bearing a [5]/[6]helicene motif (5, 7, and 11) have been successfully synthesized through a Scholl-type oxidative cyclodehydrogenation. Single-crystal X-ray diffraction indicated that the introduction of helicene significantly induces pronounced distortion. The enantiomers of 11 with a high isomerization barrier of 38.54 kcal/mol based on DFT calculation were successfully resolved and displayed mirror-image circular dichroism and circularly polarized luminescence spectra.

