Nitroxide refers to a class of chemical compounds that contain a nitrogen atom bonded to an oxygen atom. These compounds are often used in various fields, including organic chemistry and materials science, due to their unique properties. Nitroxides can act as stable free radicals, which makes them useful in processes like polymerization and as spin labels in electron paramagnetic resonance (EPR) spectroscopy. In addition to their applications in research, nitroxides are also studied for their potential in medical therapies, particularly in reducing oxidative stress. Their ability to scavenge free radicals can help protect cells from damage, making them a topic of interest in the study of aging and various diseases.