ATRP with ppb Concentrations of Photocatalysts.

ABSTRACT: In atom transfer radical polymerization (ATRP), dormant alkyl halides are intermittently activated to form growing radicals in the presence of a Cu^I/L/X-Cu^II/L (activator/deactivator) catalytic system. Recently developed very active copper complexes could decrease the catalyst concentration to ppm level. However, unavoidable radical termination results in irreversible oxidation of the activator to the deactivator species, leading to limited monomer conversions. Therefore, successful ATRP at a low catalyst loading requires continuous regeneration of the activators. Such a regenerative ATRP can be performed with various reducing agents under milder reaction conditions and with catalyst concentrations diminished in comparison to conventional ATRP. Photoinduced ATRP (Phot

SUBMITTER: Coskun HI 

PROVIDER: S-EPMC11503771 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature