Synthesis and properties of bis-corannulenes

• Main Authors: Halilovic, Dzeneta, Rajeshkumar, Venkatachalam, Stuparu, Mihaiela Corina
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2022
• Subjects: Science::Chemistry; Bis-Corannulenes; Bicorannulene System
• Online Access: https://hdl.handle.net/10356/160360
• Institution: Nanyang Technological University

Corannulenecarbaldehyde and corannulenylmethyl triphenylphosphonium bromide are combined through the Wittig olefination reaction to furnish dicorannulenylethene with 70% yield. A subsequent oxidative photocyclization leads to annulation of the corannulene nuclei to produce a C42H18 nanographene structure in 59% yield. Interestingly, only the trans isomer of the dicorannulenylethene forms cocrystals with fullerene C60 through concave-convex and convex-convex π-π stacking interactions. The Mallory photocyclization could be extended to a phenanthrene-based diarylethene precursor to yield a large bicorannulene system.