Synthesis and optoelectronic properties of radical conjugated polyfluorenes

A novel redox-active fluorene monomer is synthesized and copolymerized with 9,9-dioctylfluorene and benzo[c][1,2,5]thiadiazole via Suzuki cross-coupling to produce alternating and tertiary copolymers. Electrochemical and chemical reduction of the copolymers generates organic polymeric radical anions. Electrochemical, spectroscopic, and photophysical characterization grant insight into the structure-property relationship for open-shell conjugated polymers.