Immortal SET–LRP mediated by Cu(0) wire
Immortal SET–LRP mediated by Cu(0) wire
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DOI：
10.1002/pola.24059
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发表时间：
2010-06
期刊：
影响因子：
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通讯作者：
Xuan Jiang;Brad M. Rosen;V. Percec
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文献类型：
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作者：
Xuan Jiang;Brad M. Rosen;V. Percec
Cu（0）-线/Me 6-TREN是用于经由SET-LRP的活性自由基聚合的成熟催化剂。在这里，它证明了这种聚合不仅仅是活的，但它实际上是不朽的活性自由基聚合的第一个例子。用Cu（0）线介导的SET-LRP的不朽性通过尝试以不成功的方式通过暴露于来自空气的O2多次不可逆地中断聚合来证明。每次当反应混合物暴露于空气时，SET-LRP确实停止。然而，每次在重新密封反应容器并用相同的Cu（0）线重新建立催化循环之后重新启动SET-LRP反应，以产生与常规的不间断SET-LRP方法相同的转化率。尽管被O2中断，但重新活化的SET-LRP对分子量、分子量演变和分子量分布具有良好的控制，并且完美地保留了链端保真度。© 2010 Wiley Periodicals，Inc.聚合物科学杂志A部分：聚合物化学48：2716-2721，2010
Cu(0)-wire/Me6-TREN is a well established catalyst for living radical polymerization via SET–LRP. Here, it is demonstrated that this polymerization is not just living, but it is in fact the first example of immortal living radical polymerization. The immortality of SET–LRP mediated with Cu(0) wire was demonstrated by attempting, in an unsuccessful way, to irreversible interrupt multiple times the polymerization via exposure to O2 from air. SET–LRP indeed stopped each time when the reaction mixture was exposed to air. However, the SET–LRP reaction, was restarted each time after resealing the reaction vessel and reestablishing the catalytic cycle with the same Cu(0) wire, to produce the same conversion as in the conventional uninterrupted SET–LRP process. Despite the interruption by O2, the reactivated SET–LRP had a good control of molecular weight, molecular weight evolution, and molecular weight distribution, with perfect retention of chain-end fidelity. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 2716–2721, 2010