Electron Paramagnetic Resonance

EPR

Electron Paramagnetic Resonance (EPR) spectroscopy is a method used for studying materials with unpaired electrons.
Electron Paramagnetic Resonance Instrument

The basic concepts of electron paramagnetic resonance spectroscopy are similar to NMR, but in EPR the electron spins are excited instead of the atomic nuclei as it would be in NMR.  EPR is useful for studying organic radicals and/or metal complexes.