Electrochemical and luminescent properties of poly(fluorene) derivatives for optoelectronic applications

We report the synthesis of novel alternating copolymers of the kind A-alt-B, where A is a dialkylfluorene unit and B is an aromatic moiety unit which is varied in order to change the position of the frontier energy levels; in particular we find that the B unit thiophene S,S-dioxide is particularly effective at increasing the polymer electron affinity and ionisation potential.