Yano, Masafumi’s team published research in Acta Crystallographica, Section E: Crystallographic Communications in 2020 | CAS: 4316-58-9

In general, Tris(4-bromophenyl)amine(cas: 4316-58-9) is often used in the synthesis of porous luminescent covalent–organic polymers (COPs)Synthetic Route of C18H12Br3N

《Crystal structure of tris[4-(naphthalen-1-yl)phenyl]amine》 was written by Yano, Masafumi; Kashiwagi, Yukiyasu; Inada, Yoshinori; Hayashi, Yuki; Mitsudo, Koichi; Kubono, Koji. Synthetic Route of C18H12Br3NThis research focused ontris naphthalen phenyl amine dimer crystal structure hydrogen bond; crystal structure; electroluminescence; hole transporter; organic electronics; tri­aryl­amine. The article conveys some information:

In the title mol., C48H33N, the central N atom shows no pyramidalization, so that the N atom and the three C atoms bound to the N atom lie almost in the same plane. The three para-phenylene rings bonded to the N atom are in a propeller form. All of the naphthalene ring systems are slightly bent. In the crystal, mols. form an inversion dimer, through two pairs of C-H···π interactions, which further interacts with the adjacent dimer via another two pairs of C-H···π interactions, forming a column structure along the a axis. There are no significant interactions between these column structures. The experimental process involved the reaction of Tris(4-bromophenyl)amine(cas: 4316-58-9Synthetic Route of C18H12Br3N)

In general, Tris(4-bromophenyl)amine(cas: 4316-58-9) is often used in the synthesis of porous luminescent covalent–organic polymers (COPs)Synthetic Route of C18H12Br3N

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary