Solvent Effects and Side Reactions in Organocatalyzed Atom Transfer Radical Polymerization for Enabling the Controlled Polymerization of Acrylates Catalyzed by Diaryl Dihydrophenazines.

ABSTRACT: Investigation of the effects of a solvent on the photophysical and redox properties of the photoredox catalyst (PC), N,N-di(2-naphthyl)-5,10-dihydrophenazine (PC 1), revealed the opportunity to use tetrahydrofuran (THF) to modulate the reactivity of PC 1 toward achieving a controlled organocatalyzed atom transfer radial polymerization (O-ATRP) of acrylates. Compared with dimethylacetamide (DMAc), in tetrahydrofuran (THF), PC 1 exhibits a higher quantum yield of intersystem crossing (Φ_ISC = 0.02 in DMAc, 0.30 in THF), a longer singlet excited-state lifetime (τ _Singlet = 3.81 ns in DMAc, 21.5 ns in THF), and a longer triplet excited-state lifetime (τ _Triplet = 4.3 μs in DMAc, 15.2 μs in THF). Dest

SUBMITTER: McCarthy B 

PROVIDER: S-EPMC8276882 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature