Liu, Meifang; Liu, Li; Zhang, Zhihui; Wan, Meixiu; Guo, Huanmei; Li, Dan published an article in 2021. The article was titled 《An active catalyst system based on Pd (0) and a phosphine-based bulky ligand for the synthesis of thiophene-containing conjugated polymers》, and you may find the article in Frontiers in Chemistry (Lausanne, Switzerland).Reference of Tris(4-bromophenyl)amine The information in the text is summarized as follows:
To address the limitations of conventional Pd catalysts in the polymerization of thiophenecontaining conjugated polymers, an active catalyst system based on Pd (0) and a phosphinebased bulky ligand, L1, is explored systematically in Suzuki-Miyaura polymerizations using thiophene boronic acid pinacol ester as one of the monomers. This active catalyst is found very efficient in synthesizing a series of thiophene-containing linear and hyperbranched conjugated polymers. First, as a model example, coupling reactions between electron-rich/moderately hindered aryl or thienyl halides and thiophene boronic acid pinacol ester give excellent yields with lower catalyst loading and can be completed in a shorter reaction time relative to Pd(PPh3)4. Notably, high mol. weight thiophene-containing polymers are successfully synthesized by Suzuki-Miyaura polycondensation of 2,5-thiophene bis(boronic acid) derivatives with different dibromo- and triple bromo-substituted aromatics in 5-15 min. In the part of experimental materials, we found many familiar compounds, such as Tris(4-bromophenyl)amine(cas: 4316-58-9Reference 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)Reference of Tris(4-bromophenyl)amine
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary