N,N-Diaryl Dihydrophenazines as Photoredox Catalysts for PET-RAFT and Sequential PET-RAFT/O-ATRP,ACS Macro Letters

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N,N-Diaryl Dihydrophenazines as Photoredox Catalysts for PET-RAFT and Sequential PET-RAFT/O-ATRP
ACS Macro Letters ( IF 5.1 ) Pub Date : 2018-05-23 00:00:00 , DOI: 10.1021/acsmacrolett.8b00281
Jordan C Theriot _{1,

2} , Garret M Miyake ₂ , Cyrille A Boyer ₁

Affiliation

N,N-Diaryl dihydrophenazines are employed as organic photoredox catalysts (PCs) for photoinduced electron/energy transfer–reversible addition–fragmentation chain transfer (PET-RAFT) polymerization. The ability of these PCs to mediate PET-RAFT is heavily dependent on the ability of the PC to access a photoexcited intramolecular charge transfer state. The use of PCs displaying intramolecular charge transfer in the excited state allows for efficient PET-RAFT of a variety of monomers, including vinyl acetate, and in a wide range of solvents. The ability of these PCs to also mediate organocatalyzed atom transfer radical polymerization (O-ATRP) is exploited to perform a sequential PET-RAFT/O-ATRP block copolymerization of PMA-b-PMMA using the same PC for both polymerizations.

中文翻译：

N,N-二芳基二氢吩嗪作为 PET-RAFT 和顺序 PET-RAFT/O-ATRP 的光氧化还原催化剂

N , N-二芳基二氢吩嗪用作有机光氧化还原催化剂 (PC)，用于光诱导电子/能量转移-可逆加成-断裂链转移 (PET-RAFT) 聚合。这些 PC 介导 PET-RAFT 的能力在很大程度上取决于 PC 进入光激发分子内电荷转移状态的能力。使用在激发态下表现出分子内电荷转移的 PC 可以在多种溶剂中对包括乙酸乙烯酯在内的各种单体进行有效的 PET-RAFT。利用这些 PC 介导有机催化原子转移自由基聚合 (O-ATRP) 的能力，使用相同的 PC 进行 PMA-b-PMMA 的连续 PET-RAFT/O-ATRP 嵌段共聚。

更新日期：2018-05-23

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