PROFLUORESCENT NITROXIDE COMPOUNDS

摘要

A polymeric system which includes a polymeric material and a pro-fluorescent nitroxide compound or a fluorescent spin adduct thereof, the compound having at least one 5 to 10 membered heterocyclic ring comprising a nitroxide moiety or a fluorescent spin adduct thereof and an aryl or heteroaryl group fused therewith, wherein the compound includes at least one fluorophore; with the proviso that when the heterocyclic ring has 5 carbon atoms, the aryl group cannot be an unsubstituted phenanthrene.