Determination of rate constants for the activation step in atom transfer radical polymerization using the stopped-flow technique

The use of stopped-flow techniques to measure activation rate constants for model systems in copper-mediated atom transfer radical polymerization (ATRP) was studied. The structures of model alkyl halides and complexing ligands used in conjunction with CuBr or CuCl were shown. The time dependent absorption spectra recorded for the reaction of CuBr/2dNbpy in the presence of excess EBriB and TEMPO in CH 3CN at 25°C was shown. The activation rate constant and the catalyst structure were correlated and the deactivation rate constants for ATRP was determined using the persistent radical effect.