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Copper Removal in Atom Transfer Radical Polymerization through Electrodeposition
Author(s) -
NasserEddine Mohamad,
Delaite Christelle,
Dumas Philippe,
Vataj Rame,
Louati Alain
Publication year - 2004
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200300221
Subject(s) - atom transfer radical polymerization , copper , schiff base , morpholine , electrochemistry , polymer chemistry , polymerization , alkyl , materials science , ligand (biochemistry) , chemistry , inorganic chemistry , photochemistry , polymer , electrode , organic chemistry , biochemistry , receptor
Summary: We describe the removal of copper from atom transfer radical polymerization (ATRP) through electrochemistry. tert ‐Butyl methacrylate ATRP initiated by a PEO macroinitiator was run with CuBr complexed by N ‐alkyl‐2‐pyridylmethanimine (Schiff base) or 2,2′‐bipyridyl (bpy) as catalyst. Voltammetry experiments using a CuBr/(Schiff base N ‐morpholine‐2‐pyridylmethanimine) 2 complex on a Pt electrode shows an oxidation peak of the ligand at 1.2 V permitting the oxidative destruction of the complex and so the elimination of copper. Using a Hg electrode, it is possible to directly reduce these complexes (at −2.1 V for the morpholine‐2‐pyridylmethanimine, −2.19 V for the butyl‐2‐pyridylmethanimine, and −2.25 V for the bpy). This complex reduction, followed by the formation of a copper amalgam, leads to the quantitative removal of copper and proceeds without polymer degradation.The electrochemical removal of copper from the ATRP reaction.