绿光照射下小分子催化的PET-RAFT聚合反应
PET-RAFT Polymerization Catalyzed by Small Organic Molecule under Green Light Irradiation.
作者信息
Tao Huazhen, Xia Lei, Chen Guang, Zeng Tianyou, Nie Xuan, Zhang Ze, You Yezi
机构信息
Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
出版信息
Polymers (Basel). 2019 May 15;11(5):892. doi: 10.3390/polym11050892.
Photocatalyzed polymerization using organic molecules as catalysts has attracted broad interest because of its easy operation in ambient environments and low toxicity compared with metallic catalysts. In this work, we reported that 4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole (DTBT) can act as an efficient photoredox catalyst for photoinduced electron transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization under green light irradiation. Well-defined (co)polymers can be obtained using this technique without any additional additives like noble metals and electron donors or acceptors. The living characteristics of polymerization were verified by kinetic study and the narrow dispersity () of the produced polymer. Excellent chain-end fidelity was demonstrated through chain extension as well. In addition, this technique showed great potential for various RAFT agents and monomers including acrylates and acrylamides.
使用有机分子作为催化剂的光催化聚合反应因其在环境条件下易于操作且与金属催化剂相比毒性较低而引起了广泛关注。在这项工作中，我们报道了4,7-二（噻吩-2-基）苯并[c][1,2,5]噻二唑（DTBT）在绿光照射下可作为一种高效的光氧化还原催化剂用于光诱导电子转移-可逆加成-断裂链转移（PET-RAFT）聚合反应。使用该技术无需任何额外添加剂（如贵金属、电子供体或受体）即可获得结构明确的（共）聚合物。通过动力学研究和所制备聚合物的窄分散度（）验证了聚合反应的活性特征。通过链延伸也证明了优异的链端保真度。此外，该技术对包括丙烯酸酯和丙烯酰胺在内的各种RAFT试剂和单体显示出巨大潜力。
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