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Tsutomu Yokozawa, Ryosuke Suzuki, Masataka Nojima, Yoshihiro Ohta and Akihiro Yokoyama Precision Synthesis of Poly(3-hexylthiophene) from Catalyst-Transfer Suzuki−Miyaura Coupling Polymerization Macromolecular Rapid Communications 32

Article first published online: 20 APR 2011 | DOI: 10.1002/marc.201100037

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Suzuki-Miyaura coupling polymerization of 2-(4-hexyl-5-iodo-2-thienyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (2) withtBu3PPd(Ph)Br (1) proceeds at 0°C in the presence of CsF and 18-crown-6 to yield P3HT with controlled molecular weight up to 11400 g·mol−1 and almost perfect head-to-tail regioregularity. Successive 1 -catalyzed polymerization of fluorene monomer 3 and then 2 yielded well-defined block copolymer of polyfluorene and P3HT.

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