In this work, photoswitchable and interconvertible cationic/radical copolymerization was investigated by combining a Lewis acid-catalyzed cationic polymerization with a photoinduced electron/energy transfer (PET)-reversible addition-fragmentation transfer (RAFT) polymerization, in which the dormant terminal group of the RAFT polymerization was employed as the dual mediator for cationic and photoradical polymerizations. The photoredox catalyst, a zinc porphyrin complex (ZnTPP), was tested with a series of Lewis acids. When coupled with a boron-based Lewis acid, B(C 6 F 5 ) 3 , the concurrent and interconvertible cationic/radical copolymerization of vinyl ether and methyl acrylate successfully proceeded in a controlled manner under visible light irradiation, in which the ratio of the generation of cationic and radical species was controlled by irradiation with different wavelengths of visible light. Photoswitchable and interconvertible cationic/radical copolymerization was investigated by combining a Lewis acid-catalyzed cationic polymerization with a photoinduced electron/energy transfer (PET)-reversible addition-fragmentation transfer (RAFT) polymerization, in which the dormant terminal group of the RAFT polymerization was employed as the dual mediator for cationic and photoradical polymerizations. Zinc porphyrin complex (ZnTPP) as the photoredox catalyst and bulky boron-based Lewis acid, B(C 6 F 5 ) 3 , was successfully combined to induce the concurrent and interconvertible cationic/radical copolymerization of vinyl ether and methyl acrylate under visible light irradiation.

中文翻译：

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可见光触发的可相互转化和可切换的阳离子/PET-RAFT共聚

在这项工作中，通过将路易斯酸催化的阳离子聚合与光致电子/能量转移 (PET)-可逆加成-断裂转移 (RAFT) 聚合相结合，研究了光可切换和可相互转化的阳离子/自由基共聚，其中休眠端基为RAFT 聚合被用作阳离子和光自由基聚合的双重介体。光氧化还原催化剂，锌卟啉配合物（ZnTPP），用一系列路易斯酸进行了测试。当与硼基路易斯酸 B(C 6 F 5 ) 3 偶联时，乙烯基醚和丙烯酸甲酯的同步和可相互转化的阳离子/自由基共聚在可见光照射下以受控方式成功进行，其中阳离子和自由基物种的产生比例由不同波长的可见光照射控制。通过将路易斯酸催化的阳离子聚合与光诱导电子/能量转移 (PET)-可逆加成-断裂转移 (RAFT) 聚合相结合，研究了光可切换和可相互转化的阳离子/自由基共聚，其中 RAFT 聚合的休眠端基是用作阳离子和光自由基聚合的双重介体。锌卟啉配合物 (ZnTPP) 作为光氧化还原催化剂和体积大的硼基路易斯酸 B(C 6 F 5 ) 3 成功地结合在可见光照射下诱导乙烯基醚和丙烯酸甲酯的同步和可相互转化的阳离子/自由基共聚.