Copper Removal in Atom Transfer Radical Polymerization through Electrodeposition
| Autor: | Alain Louati, Rame Vataj, Philippe Dumas, Mohamad Nasser-Eddine, Christelle Delaite |
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| Rok vydání: | 2004 |
| Předmět: |
Schiff base
Polymers and Plastics Atom-transfer radical-polymerization General Chemical Engineering Organic Chemistry chemistry.chemical_element Electrochemistry Copper Catalysis chemistry.chemical_compound Polymer degradation chemistry Polymer chemistry Materials Chemistry Amalgam (chemistry) Voltammetry |
| Zdroj: | Macromolecular Materials and Engineering. 289:204-207 |
| ISSN: | 1438-7492 |
| DOI: | 10.1002/mame.200300221 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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