Chain-growth polymerization of unusual anion-radical monomers based on naphthalene diimide: a new route to well-defined n-type conjugated copolymers.
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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DOI：
10.1021/ja208710x
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发表时间：
2011-11
影响因子：
15
通讯作者：
Volodymyr Senkovskyy;R. Tkachov;H. Komber;M. Sommer;M. Heuken;B. Voit;W. Huck;V. Kataev;
中科院分区：
文献类型：
--
作者：
Volodymyr Senkovskyy;R. Tkachov;H. Komber;M. Sommer;M. Heuken;B. Voit;W. Huck;V. Kataev;
强缺电子（n 型）主链 π 共轭聚合物通常通过成熟的逐步增长缩聚方案制备，该方案能够对聚合进行有限的控制。在这里，我们证明了活化的锌和缺电子的溴化噻吩-萘二酰亚胺低聚物形成阴离子自由基复合物，而不是传统的锌有机衍生物。这些非常不寻常的锌配合物经过镍催化的链增长聚合，产生具有受控分子量、相对窄的多分散性和特定末端功能的 n 型共轭聚合物。
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.