Design and synthesis of processible functional copolymers

Novel tailor-made AB, ABAC, and ABAA type heteroaromatic copolymers, in whi ch B represents an N-alkylpyrrole unit, were synthesized via Pd-catalyzed S tille polymerization and characterized by a variety of analytical technique s. MALDI-TOF mass spectrometry allowed the detailed characterization of pol ymer weight and determination of end groups. By varying the nature of the r epeating monomer units and their sequence, copolymers with promising proper ties for photovoltaic devices could be obtained.