Synthesis and Properties of a Series of Regioregularly Amino-Substituted Oligo- and Polythiophenes

摘要

A homologous series of donor-substituted oligothiophenes 5, 7, and 9 bearing pyrrolidino groups in the "outer" β-positions were synthesized up to a quaterthiophene. The physical properties were investigated in dependence on the chain length of the conjugated system. Due to the substitution pattern, even the longer oligomers exhibit good film forming properties and could be electropolymerized to the corresponding donor-substituted polythiophenes P5, P7, and P9, which promise a pure stereo-regular structure. The electronic properties of both oligomers and polymers were found to be strongly dominated by the donor strength of the substituents.