Unraveling the Roles of Amines in Atom Transfer Radical Polymerization in the Dark.

ABSTRACT: Multidentate amines have been widely used as ligands (L) for Cu-catalysts in atom transfer radical polymerization (ATRP) and as electron donors in photochemically induced polymerizations. However, mechanistic aspects of the role of amines in ATRP in the dark have remained elusive. Herein, the structure-activity relationship and the related electron transfer reactions with Br-Cu^II/L complexes and/or with alkyl bromides (R-Br) were investigated for 25 amines. Amines function as electron donors and reducing agents for Br-Cu^II/L complexes via an outer sphere electron transfer (OSET) mechanism, enabling slow but continuous generation of Cu^I/L activators and inducing controlled ATRP. However, two amines, diazabicyclo(5.4.0)undec-7-ene (DBU) and 1,1,3,3-tetramethy

SUBMITTER: Jazani AM 

PROVIDER: S-EPMC12006995 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature