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A Direct Route to a Polybromothiophene as a Precursor for Functionalized Polythiophene by Electrooxidative Polymerization (Supporting Information)

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posted on 2023-03-08, 07:19 authored by Hazuki GOTO, Bungo OCHIAI, Yoshimasa MATSUMURA

A reactive π-conjugated polymer, bromo-substituted polythiophene, was synthesized by constant potential electrooxidative polymerization of 3-bromo-4-dodecylthiophene in an acetonitrile solution of Bu4NPF6. The resulting polymer was applied as a reactive precursor for functional polythiophenes. The protonation via lithiation of the polybromothiophene proceeded quantitatively. The phenylation of the polybromothiophene by the Kumada-Tamao coupling reaction also proceeded with a 70 % efficiency. The changes in optical and electronic properties of the polymers by their reactions are discussed by the results of UV-vis absorption spectroscopy, photoluminescence spectroscopy, and cyclic voltammetric analysis. The emission colors of the bromo-substituted, protonated, and phenylated polymers were green, yellow, and blue, respectively, demonstrating the tunability of this approach.


Kato Foundation for Promotion of Science


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