In 2019,ACS Macro Letters included an article by Wang, Zhenhua; Lorandi, Francesca; Fantin, Marco; Wang, Zongyu; Yan, Jiajun; Wang, Zhanhua; Xia, Hesheng; Matyjaszewski, Krzysztof. SDS of cas: 7789-45-9. The article was titled 《Atom Transfer Radical Polymerization Enabled by Sonochemically Labile Cu-carbonate Species》. The information in the text is summarized as follows:
Atom transfer radical polymerization (ATRP) has been previously mediated by ultrasound using a low concentration of copper complex in water (sono-ATRP) or by addition of piezoelec. materials in organic solvents (mechano-ATRP). However, these procedures proceeded slowly and yielded polymers contaminated by new chains initiated by hydroxyl radicals or by residual piezoelecs. Unexpectedly, in the presence of sodium carbonate, rapid sono-ATRP of Me acrylate in DMSO was achieved (80% conversion in <2 h) with excellent control of mol. weights and low dispersities (Mw/Mn < 1.2). The in situ formed CuII/L-CO3 complex in the presence of ultrasound generated CuI/L species as activators for ATRP and carbonate radical anions. The latter were scavenged by DMSO that was oxidized to di-Me sulfone. This simple and robust process employs low-intensity ultrasound, air-stable CuII/L catalysts, and carbonate or bicarbonate salts (washing soda or baking soda) to prepare well-defined polyacrylates. The experimental part of the paper was very detailed, including the reaction process of Cupric bromide(cas: 7789-45-9SDS of cas: 7789-45-9)
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.SDS of cas: 7789-45-9
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”