A Facile Method for Controlling the Molecular Weight of Hyperbranched Light‐Emitting Polymers

Two series of hyperbranched conjugated polymers were synthesized via an A 3 + B 2 type Wittig reaction. The molecular weights of the polymers were successfully tuned by simply changing the feed ratio of the monomers. Polymers with higher molecular weights presented more efficient photoluminescence, higher thermal stability and higher performance of LEDs.