A water-soluble organic photoredox catalyst, 3,7-methoxypolyethylene glycol 1-naphthalene-10-phenoxazine (Naph-PXZ-PEG), that can catalyze aqueous organocatalyzed atom transfer radical polymerization (ATRP) via oxidative quenching cycle has been reported for the first time. Comparative studies of Naph-PXZ-PEG and EosinY involved aqueous organocatalyzed ATRP systems have been done via polymerization experiment and kinetic modeling approach. Results showed that the polymerization via oxidative quenching cycle in Naph-PXZ-PEG system proceeded much faster and higher initiator efficiency than the polymerization via reductive quenching cycle in Eosin Y system under same conditions. Detailed information of the Naph-PXZ-PEG was presented by experiments and density functional theory (DFT) simulation. A series of kinetics experiments under different catalyst loadings, initiator concentrations, “on-off” switch of light and chain extension have been conducted and confirmed the good controllability of the current system and high end-group fidelity. This work provides a systematic study on developing an effective water soluble organic catalyst for the preparation of the well-defined polymers by a “green” and sustainable ATRP.

据报道，水溶性有机光氧化还原催化剂3,7-甲氧基聚乙二醇1-萘-10-吩恶嗪（Naph-PXZ-PEG）可以通过氧化猝灭循环催化水性有机催化的原子转移自由基聚合（ATRP）。第一次。Naph-PXZ-PEG和曙红涉及水性有机催化ATRP体系的比较研究已经通过聚合实验和动力学建模方法进行。结果表明，在相同条件下，Naph-PXZ-PEG体系中通过氧化猝灭循环进行的聚合反应比曙红Y系统中通过还原猝灭循环进行的聚合进行得更快，引发剂效率更高。通过实验和密度泛函理论（DFT）模拟，提供了Naph-PXZ-PEG的详细信息。在不同的催化剂负载量，引发剂浓度，光的“开-关”切换和扩链条件下进行了一系列动力学实验，证实了当前系统的良好可控性和高端基保真度。这项工作为开发有效的水溶性有机催化剂以通过“绿色”且可持续的ATRP制备定义明确的聚合物提供了系统的研究。