Red-Light-Induced, Copper-Catalyzed Atom Transfer Radical Polymerization
Red-Light-Induced, Copper-Catalyzed Atom Transfer Radical Polymerization
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DOI：
10.1021/acsmacrolett.2c00080
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发表时间：
2022-03-15
影响因子：
7.015
通讯作者：
Matyjaszewski, Krzysztof
中科院分区：
文献类型：
--
作者：
Dadashi-Silab, Sajjad;Kim, Khidong;Matyjaszewski, Krzysztof
尽管在光化学原子转移自由基聚合(PhotoATRP)方面取得了进展，但这些体系往往依赖于紫外光来激活/生成铜基催化物种。为了避免与紫外光相关的问题，我们开发了一个双重光氧化还原催化体系来介导红光照射下的光诱导ATRP。该催化体系由铜催化剂和光催化剂组成，铜催化剂通过ATRP平衡控制聚合反应，光催化剂如锌(II)四苯基卟啉或锌(II)酞菁在红光照射下生成活化剂铜-1物种。此外，由于光氧化还原反应中的氧气消耗，该体系表现出耐氧性，无需脱氧过程即可很好地控制聚合反应。
Despite advances in photochemical atom transfer radical polymerization (photoATRP), these systems often rely on the use of UV light for the activation/generation of the copper-based catalytic species. To circumvent the problems associated with the UV light, we developed a dual photoredox catalytic system to mediate photoinduced ATRP under red-light irradiation. The catalytic system is comprised of a Cu catalyst to control the polymerization via ATRP equilibrium and a photocatalyst, such as zinc(II) tetraphenylporphine or zinc(II) phthalocyanine, to generate the activator Cu-1 species under red-light irradiation. In addition, this system showed oxygen tolerance due to the consumption of oxygen in the photoredox reactions, yielding well-controlled polymerizations without the need for deoxygenation processes.