Osmium-Mediated Radical Polymerization

Cobalt(I)‐mediated living radical polymerization of methyl methacrylate

“…The cobalt complexes 1a-1c were prepared according to the literature. 16 Techniques 1 H NMR (400 MHz) and 13 C NMR (100 MHz) spectra were recorded on a Varian Mercury Y Plus 400-MHz spectrometer at room temperature in CDCl 3 . Chemical shifts were recorded in parts per million from the internal standard (CHCl 3 ).…”

“…Some studies clearly have shown that a complex containing other metal centers can catalyze controlled polymerization. 12,13 One example was reported by Wang et al 12 using cobaltocene(II) as a catalyst, which, well known as a 19-electron compound, reportedly reduced the initiator and was oxidized from Co(II) to Co (III) to initiate the radical polymerization. In contrast, we took notice that stable cobalt(I) species were readily oxidized to cobalt(II) species.…”

In situ bidentate to tetradentate ligand exchange reaction in cobalt-mediated radical polymerization

“…Numerous transition metals including nickel [23], titanium [24,25], molybdenum [26,27], osmium [28,29] cobalt [30] and rhenium [31] are effective for ATRP [32]. This family is however dominated by ruthenium [33][34][35], iron [36][37][38][39] and copper complexes [10,21,28,[40][41][42][43][44].…”

Synthesis of tri-block copolymers through reverse atom transfer radical polymerization of methyl methacrylate using polyurethane macroiniferter

“…Controlled radical polymerization (CRP) [4][5][6][7][8][9][10][11] is another tool to improve chemoselectivity of radical polymerization. Atom transfer radical polymerization (ATRP) is the most robust CRP method to synthesize different types of polymers because of its simple polymerization conditions [12,13].…”