Dual Stimuli Switching: Interconverting Cationic and Radical Polymerizations with Electricity and Light
Dual Stimuli Switching: Interconverting Cationic and Radical Polymerizations with Electricity and Light
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DOI：
10.1016/j.chempr.2020.05.003
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发表时间：
2020-07
期刊：
影响因子：
23.5
通讯作者：
Michael J Supej;B. M. Peterson;B. Fors
中科院分区：
文献类型：
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作者：
Michael J Supej;B. M. Peterson;B. Fors
对新兴技术所必需的先进材料的需求不断增长，需要能够轻松生成具有复杂结构的聚合物的合成方法。多嵌段共聚物表现出一系列材料特性，具体取决于聚合物嵌段的长度和数量。目前，仍然缺乏可以轻松合成这些多嵌段结构的聚合方法。在这里，我们报告了通过电化学和光化学刺激控制单体掺入来原位合成多嵌段共聚物。为了实现这一目标，我们开发了一种阳离子聚合，其中聚合物链的增长是通过聚合物链末端的可逆电化学氧化来控制的，并将其与相容的光控自由基聚合结合起来。该过程用于生成高阶多嵌段共聚物，其中嵌段的数量和每个链段的长度由两种刺激物控制。这种方法适合自动化，将有助于加快下一代材料的发现速度。
Increasing demand for advanced materials essential to emerging technologies calls for synthetic methods that can easily generate polymers with complex structures. Multiblock copolymers display a range of material properties depending on the length and number of polymer blocks. Currently, there remains a lack of polymerization processes that can easily synthesize these multiblock structures. Here, we report thein situsynthesis of multiblock copolymers by controlling monomer incorporation with electrochemical and photochemical stimuli. To achieve this, we developed a cationic polymerization where polymer chain growth is controlled by reversible electrochemical oxidation of the polymer chain end and coupled this with a compatible photocontrolled radical polymerization. This process was used to generate higher-order multiblock copolymers wherein the number of blocks and the length of each segment is controlled by the two stimuli. This method, which lends itself to automation, will aid in accelerating the rate at which next-generation materials are discovered.