Blue‐light‐induced atom transfer radical polymerization enabled by iron/copper dual catalysis
Blue‐light‐induced atom transfer radical polymerization enabled by iron/copper dual catalysis
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DOI：
10.1002/pol.20220633
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发表时间：
2022-12
影响因子：
3.4
通讯作者：
D. Schild;Juliana Bem;Grzegorz Szczepaniak;Arman Moini Jazani;K. Matyjaszewski
中科院分区：
文献类型：
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作者：
D. Schild;Juliana Bem;Grzegorz Szczepaniak;Arman Moini Jazani;K. Matyjaszewski
报道了以丙酮酸钠和蓝光（λmax= 456 nm）为引发剂的连续活化剂再生原子转移自由基聚合（PICAR ATRP）。水溶性低聚（环氧乙烷）甲基醚甲基丙烯酸酯（OEOMA 500）在生物学相关条件下聚合。在水中用1000 ppm（相对于单体）浓度的CuBr 2、三（2-吡啶基甲基）胺和1000 ppm或更少的FeCl 3作为助催化剂进行聚合。在不到60分钟的时间内合成了具有高达90%单体转化率、高分子量（Mn> 190，000）和低分散性（1.14 <Mn < 1.19）的定义明确的聚合物。通过改变丙酮酸钠（SP）、铁和支持卤化物的浓度以及光强度来调谐聚合速率和分散性。Cu/Fe双催化剂提供了耐氧性，使得能够在不脱氧的情况下对OEOMA 500进行快速、良好控制的水性PICAR ATRP。
Photoinduced initiators for continuous activator regeneration atom transfer radical polymerization (PICAR ATRP) using sodium pyruvate and blue light (λmax= 456 nm) is reported. Water‐soluble oligo(ethylene oxide) methyl ether methacrylate (OEOMA500) was polymerized under biologically relevant conditions. Polymerizations were conducted with 1000 ppm (with respect to the monomer) concentrations of CuBr2, tris(2‐pyridylmethyl)amine, and 1000 ppm or less FeCl3as a cocatalyst in water. Well‐defined polymers with up to 90% monomer conversion, high molecular weights (Mn> 190,000), and low dispersity (1.14 <Ð< 1.19) were synthesized in less than 60 min. The polymerization rate and dispersity were tuned by varying the concentration of sodium pyruvate (SP), iron, and supporting halide, as well as light intensity. The Cu/Fe dual catalysis provided oxygen tolerance enabling rapid, well‐controlled, aqueous PICAR ATRP of OEOMA500without deoxygenation.