Iron-bearing self-folding polymers were created with amphiphilic random copolymers as active, versatile, and recyclable polymer-supported catalysts for living radical polymerization (LRP). The key is to build bis(imino)pyridine ligand cavities for iron complexes as linking units within self-folding polymers. Self-folding polymer ligands are synthesized by the intramolecular imine cross-linking of self-folded amphiphilic random copolymers bearing hydrophilic poly(ethylene glycol) (PEG), hydrophobic dodecyl, and urea/aniline pendants with 2,6-pyridinedicarboxaldehyde in water. The folding polymers efficiently formed iron complex catalysts in the cores to induce LRP and random or block copolymerization of various methacrylates. The self-folding polymer catalysts not only showed high activity and tolerance to functional groups such as acid, hydroxyl groups, and oxygen but also afforded easy product recovery and catalyst recycle thanks to hydrophilic PEG chains.

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用于活性自由基聚合的自折叠聚合物铁催化剂

含铁自折叠聚合物是用两亲无规共聚物作为活性自由基聚合（LRP）的活性，多功能和可回收聚合物负载的催化剂制成的。关键是为铁配合物构建双（亚氨基）吡啶配体腔，作为自折叠聚合物中的连接单元。通过具有亲水性聚乙二醇（PEG），疏水性十二烷基和脲/苯胺侧基的自折叠两亲无规共聚物的分子内亚胺交联与2,6-吡啶二甲醛在水中的合成，来实现自折叠聚合物配体的合成。折叠聚合物有效地在核中形成铁络合物催化剂，以引发LRP和各种甲基丙烯酸酯的无规或嵌段共聚。自折叠聚合物催化剂不仅显示出高活性，而且对酸等官能团具有耐受性，