In 2019,Journal of Polymer Materials included an article by Shen, Xianrong; Xia, Dengzhou; Xiang, Yixin; Gao, Jiangang. Safety of Cupric bromide. The article was titled 《CuBr2/Me6TREN mediated ARGET ATRP of methyl acrylate in polyethylene glycol》. The information in the text is summarized as follows:
ARGET ATRP of Me acrylate (MA) with low concentration of air stable-CuBr2 catalyst was successfully carried out in green solvent polyethylene glycol (PEG) without any external reducing agent. The polymerizations of MA proceeded in a well-controlled manner as evidenced by kinetic studies, chain extension results, a linear increase of the mol. weights with the increasing of monomer conversion. and narrow mol. weight distribution (Mw/Mn = 1.1). Interestingly, we found that the PEG has the reduction ability to CuBr2 and could play as supplement reducing agent cooperation with Me6TREN to mediate ARGET ATRP. Reduction of Cu(II)Br2 to Cu(I)Br by different mol. weight PEG was proved by UV-visible spectroscopy. A.Q.-PEG with different mol. weight have strong effects on polymerization rate and the polymerization can be operated at suitable conditions where the use of catalyst concentration can decrease to 25 ppm level. In the experiment, the researchers used Cupric bromide(cas: 7789-45-9Safety of Cupric bromide)
Cupric bromide(cas: 7789-45-9) can be used as reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.Safety of Cupric bromide
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”