Back Cover: Indeno[2,1-b]fluorene: A 20-π-Electron Hydrocarbon with Very Low-Energy Light Absorption (Angew. Chem. Int. Ed. 23/2013)

Authors

  • Dr. Akihiro Shimizu,

    1. Division of Frontier Materials Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531 (Japan)
    2. Present address: Department of Synthetic and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto (Japan)
    Search for more papers by this author
  • Dr. Ryohei Kishi,

    1. Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Osaka (Japan)
    Search for more papers by this author
  • Prof. Masayoshi Nakano,

    1. Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Osaka (Japan)
    Search for more papers by this author
  • Dr. Daisuke Shiomi,

    1. Department of Chemistry, Graduate School of Science, Osaka City University, Osaka (Japan)
    Search for more papers by this author
  • Prof. Kazunobu Sato,

    1. Department of Chemistry, Graduate School of Science, Osaka City University, Osaka (Japan)
    Search for more papers by this author
  • Prof. Takeji Takui,

    1. Department of Chemistry, Graduate School of Science, Osaka City University, Osaka (Japan)
    Search for more papers by this author
  • Dr. Ichiro Hisaki,

    1. Department of Material and Life Science, Graduate School of Engineering, Osaka University, Osaka (Japan)
    Search for more papers by this author
  • Prof. Mikiji Miyata,

    1. Department of Material and Life Science, Graduate School of Engineering, Osaka University, Osaka (Japan)
    Search for more papers by this author
  • Prof. Yoshito Tobe

    Corresponding author
    1. Division of Frontier Materials Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531 (Japan)
    • Division of Frontier Materials Science, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531 (Japan)

    Search for more papers by this author

Abstract

original image

10,12-dimesitylindeno[2,1-b]fluorene … … exhibits a very-low-energy light-absorption band that extends to 2000 nm, despite its small conjugation space of only 20 π electrons. This first example of a meta-quinodimethane embedded in an indenofluorene framework is presented by Y. Tobe and co-workers in their Communication on page 6076 ff. The unusual absorption behavior is attributed to the moderate singlet biradical character and the small π-conjugation space of the hydrocarbon.

Ancillary