Quenching of singlet (1? g ) oxygen by 2,2,6,6-tetramethylpiperidine derivatives

Photochemical oxidation of benzylic primary and secondary alcohols utilizing air as the oxidant

“…The same conclusion can be drawn with the use of DABCO (Table 3, entry 4). Additionally, utilizing 2,2,6,6-tetramethylpiperidine, which is a known singlet oxygen quenching reagent, 19 no product was formed ( Table 3, entry 5). Another tool that contributes to the understanding of the reaction mechanism, is the determination of the quantum yield (Φ) of the photocatalytic reaction.…”

Quenching of singlet oxygen by aliphatic amines

“…It is known that this compound is efficiently oxidized by 302 to an IV-demethylated product. 24 The measured "quenching rate" is actually an oxidation rate since rates of these two processes cannot be distinguished by this method (vida supra).…”

Studying and increasing light stability of rotomolding grade of polyethylene

“…Tinuvin 622 is a kind of polymeric and tertiary amine. All tertiary amines similar to nitroxides have the ability of quenching singlet oxygen, but secondary amines do not have this ability 7. The basicity and nucleophilicity of secondary amine HALS can sometimes contribute to undesirable side reactions 3.…”