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- Title
Synthesis and Chiroptical Properties of Quinoxaline‐Fused Polyaza[5]–[7]helicenes with Orange‐Color CPL Emissions.
- Authors
Otani, Takashi; Sasayama, Takuma; Horiuchi, Masashi; Okauchi, Shunnosuke; Kawai, Hidetoshi; Kitahara, Maho; Imai, Yoshitane; Shibata, Takanori
- Abstract
We achieved a two‐type synthesis of quinoxaline‐fused polyaza[5]‐ and [7]helicenes through consecutive N−H/C−H coupling with a hypervalent iodine reagent as a key reaction. By fusing electron‐deficient quinoxaline, these polyazahelicenes constitute an efficient donor‐acceptor type of molecule with absorption edges that reach up to approximately 650 nm. Evaluating the chiroptical properties reveals that the polyazahelicene exhibits a rare orange circularly polarized glow with a luminescence dissymmetry factor (glum value) of 0.003.
- Subjects
HELICENES; ELECTRON-deficient compounds; LUMINESCENCE; QUINOXALINES
- Publication
Helvetica Chimica Acta, 2021, Vol 104, Issue 4, p1
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.202100016