Synthesis, crystal structures and properties of carbazole-based [6]helicenes fused with an azine ring
oleh: Daria I. Tonkoglazova, Anna V. Gulevskaya, Konstantin A. Chistyakov, Olga I. Askalepova
| Format: | Article |
|---|---|
| Diterbitkan: | Beilstein-Institut 2021-01-01 |
Deskripsi
Novel carbazole-based [6]helicenes fused with an azine ring (pyridine, pyrazine or quinoxaline) have been prepared through a five-step synthetic sequence in good overall yields. Commercially available 2,3-dihaloazines were used as starting materials. To discern the effect of merging an azine moiety within a helical skeleton, the X-ray structures, UV–vis absorption and fluorescence spectra of the helicenes were investigated and compared to that of the parent carbazole-based [6]helicene (7H-phenanthro[3,4-c]carbazole).