Journal of the American Chemical Society, Vol.140, No.12, 4222-4226, 2018
Synthesis and Characterization of Hexapole [7]Helicene, A Circularly Twisted Chiral Nanographene
We report the synthesis and characterization of two hexapole [7]helicenes (H7Hs). Single crystal X-ray diffraction unambiguously confirms the molecular structure. H7H absorbs light, with distinct Cotton effect, from ultraviolet to the near-infrared (lambda(max) = 618 nm). Cyclic voltammetry reveals nine reversible redox states, consecutively from -2 to +6. These chiroptical and electronic properties of H7H are inaccessible from helicene's small homologues.