Protonation-induced red-coloured circularly polarized luminescence of [5]carbohelicene fused by benzimidazole

Hayato Sakai, Takako Kubota, Junpei Yuasa, Yasuyuki Araki, Tomo Sakanoue, Taishi Takenobu, Takehiko Wada, Tsuyoshi Kawai, Taku Hasobe

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


Benzimidazole-fused [5]carbohelicene ([5]HeliBI) was newly synthesized to examine the spectroscopic and chiroptical properties. The reversible protonation and deprotonation processes of [5]HeliBI were successfully investigated using 1H NMR, absorption and fluorescence spectral measurements. We also confirmed the circularly polarized luminescence of protonated [5]HeliBI (H+-[5]HeliBI). This is the first observation of red-coloured CPL of a helicene derivative.

Original languageEnglish
Pages (from-to)6738-6743
Number of pages6
JournalOrganic and Biomolecular Chemistry
Issue number28
Publication statusPublished - 2016

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry


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