A tetradentate ligand forming highly active catalysts for atom transfer radical polymerization

摘要

Atom transfer radical polymerization (ATRP) is a versatile tool for synthesizing various polymer structures. The copper-based catalyst have been found most versatile and active. The ligands for copper halides are nitrogen-containing compounds with different structures. The structural, steric and electronic effects of a ligand have a significant influence on the catalytic activity and control of the polymerization. By correlating the kinetic parameters of the activation and deactivation reactions with the reduction potentials of the Cu(II) complexes, Matyjaszewski concluded that more reducing Cu complexes formed faster activating Cu(I) but slower deactivating Cu(II) species.