Synthesis by oxidative polymerization with FeCl3 of a fully aromatic twisted poly(3,6-carbazole) with a blue-violet luminescence
Synthesis by oxidative polymerization with FeCl3 of a fully aromatic twisted poly(3,6-carbazole) with a blue-violet luminescence
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DOI：
10.1016/j.polymer.2004.03.048
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发表时间：
2004-05
期刊：
影响因子：
4.6
通讯作者：
A. Siove;D. Adès
中科院分区：
文献类型：
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作者：
A. Siove;D. Adès
在三氯甲烷溶液中，1，4，5，8，9-五甲基咔唑与FeCl 3发生氧化聚合反应，得到了一种新型的电活性聚（3，6-咔唑），由于相邻单体单元的空间位阻作用，聚（3，6-咔唑）具有扭曲结构.这种非共面结构首次允许咔唑化合物通过使用FeCl 3作为氧化剂的脱氢偶联路线转化为高聚物。得到了分子量Mwaround 104、高玻璃化转变和在空气中热稳定性的可溶性材料。聚合物薄膜的电化学研究表明，在高电位下的不可逆氧化过程与咔唑部分之间的非共轭一致。此外，偏离聚（1，4，5，8，9-五甲基-3，6-亚咔唑基）的连续环的共面性允许这些材料发射明亮的纯蓝紫光而没有激基缔合物形成，这可以有趣地用于开发高效的发光二极管。
Oxidative polymerization of 1,4,5,8,9 pentamethylcarbazole with FeCl3in chloroform solution, yields a new electroactive well-defined poly(3,6-carbazole) with a twisted structure due to steric hindrance of the adjacent monomer units. This non-coplanar structure allows, for the first time, to a carbazole compound to be converted in high polymer by the dehydrocoupling route using FeCl3as the oxidizing agent. Soluble materials with molecular weights Mwaround 104, high glass transition and thermal stability in air, were obtained. Electrochemical studies of polymer films exhibited one irreversible oxidation process at high potential consistent with a non-conjugation between the carbazole moities. Moreover, deviation from the coplanarity of consecutive rings of poly(1,4,5,8,9-pentamethyl-3,6-carbazolylene) permits these materials to emit a bright pure blue-violet light with no excimer formation, which can be interestingly used for the development efficient light-emitting diodes.