In 2019,Chemical Communications (Cambridge, United Kingdom) included an article by Kawano, Shin-ichiro; Kawada, Sae; Kitagawa, Yasutaka; Teramoto, Rena; Nakano, Masayoshi; Tanaka, Kentaro. Quality Control of 3,6-Dibromo-9H-carbazole. The article was titled 《Near-infrared absorption by intramolecular charge-transfer transition in 5,10,15,20-tetra(N-carbazolyl)porphyrin through protonation》. The information in the text is summarized as follows:
A porphyrin coupled quadruply with N-carbazolyl groups at the meso positions was synthesized. Because of the electron-withdrawing nature of the carbazole units at the porphyrin center, the tetra(N-carbazolyl)porphyrin and the protonated derivative display unique absorption bands derived from intramol. charge-transfer transition from the carbazoles to the porphyrin moiety. After reading the article, we found that the author used 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Quality Control of 3,6-Dibromo-9H-carbazole)
3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a pharmaceutical intermediate, and also an important intermediate of synthesizing optoelectronic materials. It has been used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent.Quality Control of 3,6-Dibromo-9H-carbazole
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary