Y. Inoue, K. Matyjaszewski
Apr 30, 2004
Citations
0
Influential Citations
41
Citations
Journal
Macromolecules
Abstract
Three new amine-based tripodal copper complexestris(2-(diethylamino)ethyl)amine/CuBr (Et6TREN/CuBr), 2,4-dimethyl-6-bis(2-(dimethylamino)ethyl)aminomethylphenoxy (N-tetramethyltriaminephenoxy) (Me4TAPH/CuII), and N,N-bis[(2-pyridyl)methyl]-2-aminomethylpyrrolide (BPPY/CuI)were prepared and investigated as ATRP catalysts in order to understand the effect of steric hindrance and the presence of a charged anionic group on the performance of catalysts based on branched tetradentate amine ligands in ATRP. Catalysts based on these ligands were evaluated for n-butyl acrylate (BA) polymerization, and their performance was compared with those of known analogues: Me6TREN and N-tetraethyltriaminephenoxy (Et4TAPH) copper complexes. When compared to Me6TREN/CuBr-mediated polymerization, the more sterically hindered Et6TREN/CuBr catalyst complex promoted a much slower and less controlled BA polymerization. This indicates that bulkiness around the metal center had a strong effect on the ATRP equilibrium. The Me4TAPH co...