A strategic preparation of ferrocenated compounds as aerobic catalysts was successfully carried out for the decolorization of methylene blue and oxidation of phenylboronic acid without light irradiation and excess addition of hydrogen peroxide.
A series of tris(R-methyltriazolylmethyl)amines [R ¼ C 6 H 5 (1), 4-FC 6 H 4 (2), 4-MeOC 6 H 4 (3), Fc (4)] were prepared and used as ligands for catalytic ATRP of methyl methacrylate (MMA). Despite a lower activity, the CuBr/4 catalyst promoted relatively well controlled polymerization compared to CuBr/1, as evidenced by narrower polydispersity indices. Meanwhile, no polymerization activity was observed with CuBr/2 and CuBr/3 under the catalytic conditions investigated. The CV measurements of CuBr 2 complexes supported 1 and 4 in DMSO showed E 1/2 values of -0.206 and -0.224 V, respectively, confirming the more electron-rich nature of CuBr/4. Although both CuBr/1 and CuBr/4 catalysts were only partially soluble in several organic solvents used, kinetic studies revealed a pseudo first order linear plot of ln[M] 0 /[M] t versus time. Addition of CuBr 2 into the polymerization systems led to a decrease in polymer polydispersities and the observed rate constants (k obs ).
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