Design, Behavior, and Recycling of Silica-Supported CuBr−Bipyridine ATRP Catalysts

摘要: A new strategy for immobilizing CuBr/bipyridine (bpy) complexes on silica surfaces is described. An immobilizable, organosilane-containing bpy ligand (SdMBpyTMS) synthesized and complexed with CuBr followed by addition to four different supports, mesoporous SBA-15 50 100 pores, controlled pore glass (CPG) 240 nonporous Cab-O-Sil EH5. The resulting solids are characterized a battery of techniques including thermogravimetric analysis/differential scanning calorimetry (TGA/DSC), FT-Raman spectroscopy, 13C 29Si magic angle spinning (MAS) cross-polarization (CP-MAS) low-temperature nitrogen physisorption, elemental analysis. Characterization these revealed that mixture covalently immobilized mono- bis-copper coordinated complexes, uncoordinated ligand, in some cases physisorbed copper exists the surface. utilized ATRP methyl methacrylate (MMA). Whereas cataly...