Reusable polymer brush-based photocatalysts for PET-RAFT polymerization
Reusable polymer brush-based photocatalysts for PET-RAFT polymerization
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DOI：
10.1039/d2py00966h
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发表时间：
2022-10-25
影响因子：
4.6
通讯作者：
Pester, Christian W.
中科院分区：
文献类型：
--
作者：
Bell, Kirsten;Freeburne, Sarah;Pester, Christian W.
这篇文章讨论了使用基于荧光素聚合物刷系在微米级玻璃支架上的异相光催化剂对聚合的控制（FPB@SiO2）。FPB@SiO2-catalyzed光诱导电子/能量转移-可逆加成-破碎链转移（PET-RAFT）聚合被证明可以为多种单体提供高转化率、可控分子量和窄分子量分布。此外，在氧气存在的情况下，这些珠子可以催化克级PET-RAFT，同时通过简单的过滤使催化剂完全回收。最后，它们的高保质期允许多次聚合和用户友好的访问精密大分子在温和的反应条件下，即使经过长时间（数月）的储存时间。
This contribution discusses the control over polymerizations using a heterogeneous photocatalyst based on fluorescein polymer brushes tethered to micron-scale glass supports (FPB@SiO2). FPB@SiO2-catalyzed photoinduced electron/energy transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization is shown to provide high conversions, controlled molecular weights and narrow molecular weight distributions for a variety of monomers. Moreover, the beads can catalyze PET-RAFT on gram scales, in the presence of oxygen, while allowing full catalyst recovery through simple filtration. Finally, their high shelf-life allows for multiple polymerizations and user-friendly access to precision macromolecules under mild reaction conditions even after prolonged (months) storage time.