As a highly efficient and environmentally friendly technology to address the challenges of sustainable chemistry and engineering, heterogeneous visible‐light photoredox catalysis has been of great potential in organic and polymer synthesis. Eosin Y (EY), one of the commonly used organo‐photoredox catalysts, has been immobilized onto commercial cotton threads via a straightforward method and single‐step coupling reaction to prepare a scalable and recyclable heterogeneous photocatalyst. The immobilized EY is capable of generating singlet oxygen for organic transformations (e. g. oxidation of thioethers) in the presence of molecular oxygen, and effectively catalysing visible‐light photoinduced electron/energy transfer−reversible addition−fragmentation chain transfer polymerizations of various functional monomers for the synthesis of well‐defined polymers in diverse “green” solvents. Facile separation and recovery of the cotton thread supported EY enable the reuse of the catalyst over multiple reaction cycles with well‐retained catalytic efficiency.

中文翻译：

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有机和聚合物合成棉线上可扩展和可回收的多相有机光催化剂

作为应对可持续化学和工程挑战的高效，环保技术，非均相可见光光氧化还原催化在有机和聚合物合成中具有巨大潜力。曙红Y（EY）是一种常用的有机光氧化还原催化剂，已通过一种简单的方法和单步偶联反应将其固定在商品棉线上，以制备可扩展且可回收的多相光催化剂。固定的EY能够在分子氧存在下产生单线态氧，用于有机转化（例如硫醚的氧化），并有效催化各种功能单体的可见光光致电子/能量转移-可逆加成-断裂链转移聚合反应，从而在多种“绿色”溶剂中合成定义明确的聚合物。棉线支撑的EY易于分离和回收，可在多个反应周期内重复使用催化剂，并保持良好的催化效率。