Light and magnetism dual-gated photoinduced electron transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization

被引：15
作者：
Hu, Lingjuan [1 ]
Wang, Qi [1 ]
Zhang, Xiaomeng [1 ]
Zhao, Haitao [1 ]
Cui, Zhe [1 ]
Fu, Peng [1 ]
Liu, Minying [1 ]
Liu, Nan [2 ]
He, Shengbao [2 ]
Pang, Xinchang [1 ]
Qiao, Xiaoguang [1 ]
机构：
[1] Zhengzhou Univ, Henan Joint Int Res Lab Living Polymerizat & Func, Henan Key Lab Adv Nylon Mat & Applicat, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China
[2] China Natl Tobacco Qual Supervis & Test Ctr, Zhengzhou 450001, Peoples R China
来源：
RSC ADVANCES | 2020年 / 10卷 / 12期
基金：
国家重点研发计划; 美国国家科学基金会;
关键词：
LIVING RADICAL POLYMERIZATION; GAMMA-FE2O3; NANOPARTICLES; OXYGEN TOLERANCE; CATALYST; PHOTOCATALYSIS; POLYMERS; MONOMERS;
D O I：
10.1039/d0ra00401d
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A novel raspberry-like gamma-Fe2O3@carbon dot (CD) nanocatalyst was prepared and applied for photoinduced electron transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization. The nanocatalyst was found to be an efficient photocatalyst in visible light-regulated PET-RAFT polymerization owing to the oxidative quenching mechanism between the photoexcited gamma-Fe2O3@CDs and the RAFT agent in the PET process. Notably, polymerization can be reversibly ceased in the absence of light or under an external magnetic field. The superparamagnetic nature and high saturation magnetization value (similar to 30.4 emu g(-1)) of the nanocatalyst contribute to convenient recycling of the nanocatalyst after polymerization. The PET-RAFT polymerization with the nanocatalyst before and after recycling was investigated, which displayed all the characteristics of controlled/living polymerization systems.
引用
收藏
页码：6850 / 6857
页数：8
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