《Tunable Assembly of Block Copolymer Tethered Particle Brushes by Surface-Initiated Atom Transfer Radical Polymerization》 was written by Wang, Zongyu; Lee, Jaejun; Wang, Zhenhua; Zhao, Yuqi; Yan, Jiajun; Lin, Yu; Li, Sipei; Liu, Tong; Olszewski, Mateusz; Pietrasik, Joanna; Bockstaller, Michael R.; Matyjaszewski, Krzysztof. Application In Synthesis of Cupric bromideThis research focused ontunable assembly block polystyrene polymethacrylate silica brush ATRP. The article conveys some information:
A strategy to synthesize SiO2-g-PMMA/PMMA-b-PS mono- and bimodal block copolymer particle brushes by surface-initiated atom transfer radical polymerization (SI-ATRP) from silica particles is presented. First, PMMA blocks were prepared by normal ATRP with controlled degree of polymerizations and grafting d. In a second step, the PS block was synthesized through a chain extension using low ppm of Cu catalyst. Variation of the SiO2-g-PMMA-Br macroinitiator concentration had a pronounced effect on the modality of the chain extension product. In the limit of small concentration, partial termination resulted in bimodal brush architectures, while more uniform brush architectures were observed with increasing concentration of macroinitiator. Brush nanoparticles with bimodal architectures assembled into string-like aggregates that bore a resemblance to structures found in systems comprised of sparse (homopolymer) brush particles. The unexpected effect of modality on structure formation points to opportunities in controlling microstructures in brush particle materials. The results came from multiple reactions, including the reaction of Cupric bromide(cas: 7789-45-9Application In Synthesis of Cupric bromide)
Some reported applications of Cupric bromide(cas: 7789-45-9) are: catalyst in cross coupling reactions; co-catalyst in Sonogashira coupling; lewis acid in enantioselective addition of alkynes.Application In Synthesis of Cupric bromide
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”