A Pivotal Biaryl Rotamer Bearing Two Floppy Pyrenes that Exhibits Cryptochiral Characteristics in the Ground State

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  • Nobuyuki Hara
    Department of Applied Chemistry Faculty of Science and Engineering Kindai University, 3–4-1 Kowakae, Higashi-Osaka Osaka 577–8502 Japan
  • Masaki Yanai
    Department of Applied Chemistry Faculty of Science and Engineering Kindai University, 3–4-1 Kowakae, Higashi-Osaka Osaka 577–8502 Japan
  • Daiki Kaji
    Department of Applied Chemistry Faculty of Science and Engineering Kindai University, 3–4-1 Kowakae, Higashi-Osaka Osaka 577–8502 Japan
  • Motohiro Shizuma
    Department of Biochemistry Osaka Research Institute of Industrial Science and Technology, 1–6-50 Morinomiya, Joto-ku Osaka 536–8553 Japan
  • Nobuo Tajima
    Computational Materials Science Center National Institute for Materials Science 1–2-1 Sengen, Tsukuba Ibaraki 305–0047 Japan.
  • Michiya Fujiki
    Graduate School of Materials Science Nara Institute of Science and Technology, Takayama, Ikoma Nara 630–0101 Japan
  • Yoshitane Imai
    Department of Applied Chemistry Faculty of Science and Engineering Kindai University, 3–4-1 Kowakae, Higashi-Osaka Osaka 577–8502 Japan

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<jats:title>Abstract</jats:title><jats:p>Optically active luminophores capable of emitting circularly polarized light (CPL) are keys in many photonic communication systems. Herein, we report a new cryptochiral CPL‐functioned molecular system composed of a <jats:italic>C</jats:italic><jats:sub>2</jats:sub>‐symmetric 5,5’,6,6’,7,7’,8,8’‐octahydro‐1,1’‐bi‐2‐naphthyl rotamer bearing two flexible linkers attached to two pyrene rings as emitters. Despite exhibiting negligibly weak circular‐dichroism (CD) signals in the ground state, the luminophore displayed a clear CPL signal in the photoexcited state.</jats:p>

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