Abstract
AbstractThis work reports the first double π‐extended undecabenzo[7]helicene1, which is a large chiral nanographene, composed of 65 fused rings and 186 conjugated carbon atoms. The molecular identity of1has been confirmed by single crystal X‐ray diffraction. A wine coloured solution of1in dichloromethane absorbs light from ultraviolet to the near infrared, featuring an extremely large molar absorption coefficient of 844 000 M−1 cm−1at 573 nm. Optically pure1shows a record high electronic circular dichroism intensity in the visible spectral range (|Δϵ|=1375 M−1 cm−1at 430 nm) known for any discrete polycyclic aromatic hydrocarbon. These unusual photophysical properties of1contrast sharply with those of a mono‐undecabenzo[7]helicene derivative2.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call