Chain-growth polymerization of unusual anion-radical monomers based on naphthalene diimide: a new route to well-defined n-type conjugated copolymers |
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Authors: | Senkovskyy Volodymyr Tkachov Roman Komber Hartmut Sommer Michael Heuken Maria Voit Brigitte Huck Wilhelm T S Kataev Vladislav Petr Andreas Kiriy Anton |
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Affiliation: | Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, 01069 Dresden, Germany. senkovskyy@ipfdd.de |
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Abstract: | Strongly electron-deficient (n-type) main-chain π-conjugated polymers are commonly prepared via well-established step-growth polycondensation protocols which enable limited control over polymerization. Here we demonstrate that activated Zn and electron-deficient brominated thiophene-naphthalene diimide oligomers form anion-radical complexes instead of conventional Zn-organic derivatives. These highly unusual zinc complexes undergo Ni-catalyzed chain-growth polymerization leading to n-type conjugated polymers with controlled molecular weight, relatively narrow polydispersities, and specific end-functions. |
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