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Updated: Oct 25, 2026

Preparation of a Corannulene-functionalized Hexahelicene by Copper(I)-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
Published on: September 18, 2016
Nonplanar S-Shaped Bisanthene: Synthesis, Structures, and Properties
Yangyang Zhao1,2, Laiyun Zhou1,2, Xinyu Zhang1
1School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi710049, China.
Abstract:
Spiro-fused polycyclic aromatic compounds have attracted increasing attention. In this work, we designed a nonplanar S-shaped compound hel-BA featuring dual [4]helicene. Its synthesis adopts an efficient cationic radical-mediated direct C-H aromatic nucleophilic substitution. X-ray diffraction reveals tight columnar stacking, with its photoluminescence quantum yield in the powder state being 28%. hel-BA displays reversible multiple redox, with the charged states showing near-infrared (NIR) absorption and promising NIR electrochromic materials. These results provide a new perspective on extended helicenes.
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