Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, 01069 Dresden, Germany.
J Am Chem Soc. 2011 Dec 14;133(49):19966-70. doi: 10.1021/ja208710x. Epub 2011 Nov 14.
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.
强缺电子（n 型）主链π共轭聚合物通常通过成熟的逐步聚合缩聚方法制备，这种方法对聚合的控制有限。在这里，我们证明了活化的 Zn 和缺电子的溴代噻吩-萘二酰亚胺齐聚物形成阴离子自由基配合物，而不是常规的 Zn-有机衍生物。这些非常不寻常的锌配合物经历 Ni 催化的链增长聚合，得到具有可控分子量、相对较窄的多分散性和特定端基的 n 型共轭聚合物。
