In situ Cu(0) catalyzed SET-LRP: The first attempt (pages 4694–4700)
Qin Zhang, Zhengbiao Zhang, Wenxiang Wang, Zhenping Cheng, Jian Zhu, Nianchen Zhou, Wei Zhang, Zhaoqiang Wu and Xiulin Zhu
Version of Record online: 17 AUG 2011 | DOI: 10.1002/pola.24917
In this work, single electron transfer-living radical polymerization (SET-LRP) was catalyzed by in-situ Cu(0) generated from copper sulphate pentahydrate (CuSO4·5H2O) and hydrazine hydrate (N2H4·H2O) at 25 °C. The polymerization smoothly occurred with moderate control over molecular weights due to some side reactions related to N2H4·H2O. This polymerization can be conducted in unfavorable solvents for SET-LRP, such as toluene and tetrahydrofuran, owing to H2O contained in CuSO4·5H2O and N2H4·H2O. Importantly, on account of the utilization of CuSO4·5H2O, this work confirmed from experimental level that it was Cu(0) or “nascent” Cu(0) which initiated and catalyzed SET-LRP. This work provided a first example of in-situ Cu(0) catalyzing SET-LRP. Optimization work is ongoing in our lab by utilization of mild reducing agents balacencing between adequate reduction ability and minimimal side reactions.