Visible Light Mediated Controlled Radical Polymerization in the Absence of Exogenous Radical Sources or Catalysts,Macromolecules

当前位置： X-MOL 学术 › Macromolecules › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Visible Light Mediated Controlled Radical Polymerization in the Absence of Exogenous Radical Sources or Catalysts
Macromolecules ( IF 5.1 ) Pub Date : 2015-06-15 00:00:00 , DOI: 10.1021/acs.macromol.5b00965
Thomas G. McKenzie ₁ , Qiang Fu ₁ , Edgar H. H. Wong ₁ , Dave E. Dunstan ₁ , Greg G. Qiao ₁

Affiliation

The application of external stimuli such as light to induce controlled radical polymerization reactions has important implications in the field of materials science. In this study, the photoactivation of trithiocarbonates (TTCs) (i.e., conventional RAFT agents) by visible light (∼460 nm) is investigated, and the ability of TTCs to control radical polymerization under visible light in the complete absence of exogenous photoinitiators or catalysts is demonstrated for the first time. By selectively exciting the spin-forbidden n → π* electronic transition, polyacrylates and polyacrylamides of low dispersity and high end group fidelity were obtained. In addition, this approach allows for the efficient synthesis of well-defined linear, (multi)block, and network (co)polymers. This study demonstrates the versatility of our strategy to generate polymers with controllable properties by visible light, which may be highly useful for applications such as surface patterning.

中文翻译：

在没有外源自由基源或催化剂的情况下，可见光介导的受控自由基聚合

施加外部刺激（例如光）以诱导受控的自由基聚合反应在材料科学领域具有重要意义。在这项研究中，研究了可见光（〜460 nm）对三硫代碳酸盐（TTC）（即常规的RAFT试剂）的光活化作用，并且在完全不存在外源光引发剂或催化剂的情况下，TTC在可见光下控制自由基聚合的能力。首次展示。通过有选择地激发自旋禁止的n→π*电子跃迁，可以获得低分散性和高端基保真度的聚丙烯酸酯和聚丙烯酰胺。另外，该方法允许有效合成明确定义的线性，（多）嵌段和网络（共）聚合物。

更新日期：2015-06-15

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南