Non-Planar [n]Cyclo-1,8-carbazolylenes (n=3,4,6) and [3]Cyclo-1,8-carbazolylenyl B, P, PO, SiPh Complexes

Koji Yamamoto, Palash Pandit, Shuhei Higashibayashi

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


A new family of non-planar heterocyclic molecules consisting of carbazoles was created. A bowl-shaped cyclodimer, a flake-shaped cyclotrimer, a double-decker-ring-shaped cyclotetramer and a cyclohexamer were synthesized by Ni0-mediated one-shot cyclo-oligomerization of 1,8-dibromocarbazole, and were named [n]cyclo-1,8-carbazolylenes (n=3,4,6). [3]Cyclo-1,8-carbazolylene was found to act as a trivalent tridentate ligand for heteroatoms (B, P, Si), giving flake-shaped complexes. The boron derivative acted as a Lewis acid, and the tetra-coordinated complexes showed an unprecedented red-shift of absorption and emission spectra by the coordination. The synthetic method, the distorted C2 or C1 symmetric shape, the trivalent tridentate coordination ability and the kinds of introduced heteroatoms of [3]cyclo-1,8-carbazolylenes, the electronic structure, the photophysical property, and the Lewis acidity were distinct from those of related subporphyrins/subphthalocyanines.

Original languageEnglish
Pages (from-to)14011-14016
Number of pages6
JournalChemistry - A European Journal
Issue number56
Publication statusPublished - 2017 Oct 9


  • carbazole
  • cyclization
  • heterocycles
  • macrocycles
  • oligomerization

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry


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