Indeno[2,1-b]fluorene: a 20-π-electron hydrocarbon with very low-energy light absorption

Akihiro Shimizu; Ryohei Kishi; Masayoshi Nakano; Daisuke Shiomi; Kazunobu Sato; Takeji Takui; Ichiro Hisaki; Mikiji Miyata; Yoshito Tobe

doi:10.1002/anie.201302091

Indeno[2,1-b]fluorene: a 20-π-electron hydrocarbon with very low-energy light absorption

Angew Chem Int Ed Engl. 2013 Jun 3;52(23):6076-9. doi: 10.1002/anie.201302091. Epub 2013 Apr 29.

Authors

Akihiro Shimizu¹, Ryohei Kishi, Masayoshi Nakano, Daisuke Shiomi, Kazunobu Sato, Takeji Takui, Ichiro Hisaki, Mikiji Miyata, Yoshito Tobe

Affiliation

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

PMID: 23630025
DOI: 10.1002/anie.201302091

Abstract

Smaller can be better: The first example of meta-quinodimethane embedded in an indenofluorene framework has been synthesized. 10,12-Dimesitylindeno[2,1-b]fluorene exhibits extremely low-energy light absorption, despite the small conjugation space of the molecule, which consists of only 20 π electrons.