Tripodal “click” ligands for copper‐catalyzed ATRP |
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| Authors: | Preeyanuch Sangtrirutnugul Purmpoon Maisopa Laksamee Chaicharoenwimolkul Atchariya Sunsin Ekasith Somsook Vichai Reutrakul |
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| Affiliation: | 1. Faculty of Science, Department of Chemistry, Center for Catalysis, Mahidol University, Rama VI Road, Bangkok 10400, Thailand;2. Faculty of Science, Department of Chemistry and Center of Innovation in Chemistry, Mahidol University, Bangkok 10400, Thailand;3. Faculty of Science, Department of Chemistry, NANOCAST Laboratory, Mahidol University, Bangkok 10400, Thailand |
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| Abstract: | A series of tris(R‐methyltriazolylmethyl)amines [R = C6H5 ( 1 ), 4‐FC6H4 ( 2 ), 4‐MeOC6H4 ( 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 CuBr2 complexes supported 1 and 4 in DMSO showed E1/2 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 CuBr2 into the polymerization systems led to a decrease in polymer polydispersities and the observed rate constants (kobs). © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 |
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| Keywords: | click ligand ATRP MMA copper catalyst |
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