Preparation of Functional Poly(aroyltriazole)s by Metal‐Free Click Polymerization

Abstract Functional poly(aroyltriazoles) (PATAs) were synthesized by heating mixtures of bis(aroylacetylene)s and diazides in polar solvents such as DMF/toluene at a moderate temperature of 100 °C with high molecular weights ( M w up to 17 200) and regioregularities (1,4‐regioisomeric ratio up to ∼95%) in high yields (up to ∼95%). The obtained polymers are soluble in common organic solvents and are thermally stable. The PATAs containing triphenylamine units emit visible light and show unique solvatochromism, exhibiting large two‐photon absorption cross sections due to the intramolecular charge transfer between their electron‐donating triphenylamine and electron‐accepting aroyltriazole units. The tetraphenylethene (TPE)‐functionalized polymer shows intriguing aggregation‐induced emission phenomenon, that is, the polymer is weakly emissive in its solution state but emit strongly in its aggregate/solid state with quantum yield of ∼7.1%.