Beilstein J. Org. Chem.2020,16, 317–324, doi:10.3762/bjoc.16.31
a monomer. Nickel-catalyzed polymerization of bithiophene with substituents at the 3-position, including alkyl-, fluoroalkyl-, or oligosiloxane-containing groups, afforded the corresponding copolymers in good to excellent yield. The solubility test in organic solvents was performed to reveal that
several copolymers showed a superior solubility. X-ray diffraction analysis of the thin film of the alternating copolymers composed of methyl and branched oligosiloxane substituents was also performed, and the results suggested the formation of a dual-layered film structure.
Keywords: alternating
copolymer; nickel(II) catalyst; oligosiloxane; regioregular polythiophene; solubility; Introduction
Polythiophenes attract much attention in materials science because of their extended π-conjugation, which is applied for a wide range of electronic materials. In particular, the regioregular polymers with a
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Graphical Abstract
Scheme 1:
Cross-coupling polymerization of thiophene.