Ring-opening polymerization of lactones has served as one of the most resourceful and versatile methods for the production of polyesters. However, the photocontrolled ring-opening polymerization of lactones with the advantages of being inexpensive, green, and noninvasive, is still rarely reported. In this work, we developed a series of composite photoacid generators containing a common photocatalyst and an onium salt to induce the living/controlled cationic ring-opening polymerization of lactones using benzyl alcohol or butyl alcohol as an initiator under visible light. The wavelength of the light could be easily adjustable by applying different photocatalysts. Moreover, radical species are generated concurrently during the electron transfer processes; as a result, simultaneous living/controlled cationic ring-opening polymerization of lactones and reversible addition–fragmentation chain transfer radical (RAFT) polymerization can be performed using hydroxy group capped trithiocarbonate to produce hybrid block copolymers. Photocontrolled ring-opening polymerization of lactones with the advantages of being inexpensive, green, and noninvasive, is still rarely reported. In this work, we developed a series of composite photoacid generators containing a common photocatalyst and an onium salt to induce the living/controlled cationic ring-opening polymerization of lactones using alcohol compound as an initiator under visible light. The wavelength of the light could be easily adjustable by applying different photocatalysts. Moreover, simultaneous living/controlled cationic ring-opening polymerization of lactones and reversible addition–fragmentation chain transfer radical (RAFT) polymerization of methyl acrylate can be performed using hydroxy group capped trithiocarbonate to produce hybrid block copolymers in one step.

中文翻译：

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内酯的可见光诱导活性/可控阳离子开环聚合

内酯的开环聚合已成为生产聚酯的最有效和通用的方法之一。然而，内酯的光控开环聚合具有廉价、绿色、无创等优点，目前仍鲜有报道。在这项工作中，我们开发了一系列包含普通光催化剂和鎓盐的复合光酸产生剂，以在可见光下使用苯甲醇或丁醇作为引发剂诱导内酯的活性/受控阳离子开环聚合。通过应用不同的光催化剂，可以轻松调节光的波长。此外，在电子转移过程中同时产生自由基物种；因此，可以使用羟基封端的三硫代碳酸酯同时进行内酯的活性/受控阳离子开环聚合和可逆加成-断裂链转移自由基（RAFT）聚合，以制备杂化嵌段共聚物。内酯的光控开环聚合具有廉价、绿色、无创等优点，目前还鲜有报道。在这项工作中，我们开发了一系列包含普通光催化剂和鎓盐的复合光酸产生剂，以在可见光下使用醇化合物作为引发剂诱导内酯的活性/可控阳离子开环聚合。通过应用不同的光催化剂，可以轻松调节光的波长。而且，