Triphenylamine-Based N,O-Bidentate BF2-Enolimine Initiator for Three-arm Star Polymethacrylates with Dual-State Fluorescent Emission.

Three-arm star polymethacrylates with dual-phase (solution and solid-state) fluorescent emission have been synthesized via atom transfer radical polymerization (ATRP) using triphenylamine-derived organbo complex (TAPA-BKI-3Br) as initiator. The as-synthesized three-arm star polymethacrylates exhibited bright emission in both solution and the solid states due to the highly twisted structure and ICT effect of TAPA-BKI core, as well as the resistance of the polymer chains. And the polymer chains have an important influence on the photophysical behavior of the as-synthesized three-arm star polymethacrylates in the aggregate state.