Facile Preparation of Light Refractive Poly(aroxycarbonyltriazole)s by Metal‐Free Click Polymerization

A series of poly(aroxycarbonyltriazole)s (PACTs) with high molecular weights and regioregularities is prepared in excellent yields by the metal‐free click polymerization (MFCP) of dipropiolate ( 1 ) and diazides ( 2 ) in dimethylformamide (DMF) at 100 °C for 6 h. The MFCPs can proceed smoothly in an open atmosphere, without protection from oxygen and moisture. The PACTs show good solubility and processability. They are thermally stable and the temperatures of their 5% weight‐loss are higher than 363 °C. The polymers exhibit high optical transparency and refractive indices with low chromatic dispersions. Moreover, the polymer film containing benzophenone units can be cross‐linked upon UV irradiation to generate negative photoresist patterns with high resolution. image