A novel conjugated polymer containing alternating p- and n-type moieties with balanced properties of conducting holes and electrons

A new electroluminescent conjugated polymer consisting of 2,2'-bipyridylene vinylene (BPyV) and 2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene (M EH-PV) moieties (BPy-MEH-PV), was synthesized by incorporating an n-dope ty pe moiety, BPyV, and a p-dope type moiety, MEH-PV, into the polymer chain. This facile method provides a new approach to the synthesis of conjugated p olymers with balanced ability of conducting electrons and holes. PBy-MEH-PP V exhibits tunable optical properties through protonation, and the emissive color can be progressively changed from orange to deep red depending on th e degree of protonation.