A Series of Hyperbranched Polytriazoles Containing Perfluoroaromatic Rings from AB 2 ‐Type Monomers: Convenient Syntheses by Click Chemistry under Copper(I) Catalysis and Enhanced Optical Nonlinearity

In this paper, four new hyperbranched polytriazoles containing azo moieties, derived from different AB 2 ‐type monomers, were successfully prepared through the “click” chemistry reaction under copper(I) catalysis by modifying the synthetic route. The polymers were soluble in organic solvents and exhibited good second‐order nonlinear optical (NLO) properties. Thanks to the self‐assembly of perfluoroaromatic moieties in the periphery, HP2 showed the best NLO properties, with the d 33 value as high as 145.0 pm V −1 .