In 2022,Yano, Masafumi; Inada, Yoshinori; Hayashi, Yuki; Nakai, Misaki; Mitsudo, Koichi; Kashiwagi, Yukiyasu published an article in Dyes and Pigments. The title of the article was 《Near-infrared absorption of a benzothiophene-appended triphenylamine radical cation: A novel molecular design of NIR-II dye》.Safety of Tris(4-bromophenyl)amine The author mentioned the following in the article:
A triphenylamine with 3 benzothiophene rings was designed and synthesized in 87% yield. The compound showed absorption at 386 nm and blue emission at ∼442 nm, with a fluorescence quantum yield of 0.57. The compound showed high thermostability. The radical cation obtained by 1-electron oxidation was stable in solution and showed a significant absorption in the NIR-II region (λmax = 1213 nm). DFT calculations confirmed the exptl. data. The experimental part of the paper was very detailed, including the reaction process of Tris(4-bromophenyl)amine(cas: 4316-58-9Safety of Tris(4-bromophenyl)amine)
In other references, Tris(4-bromophenyl)amine(cas: 4316-58-9) is often used in the synthesis of porous luminescent covalent–organic polymers (COPs)Safety of Tris(4-bromophenyl)amine
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary