= Electron paramagnetic resonance
{wiki=Electron_paramagnetic_resonance}
Electron Paramagnetic Resonance (EPR), also known as Electron Spin Resonance (ESR), is a spectroscopic technique used to study materials that have unpaired electrons. These unpaired electrons can originate from a variety of sources, including free radicals, transition metal complexes, and certain types of defects in solids. \#\#\# Key Principles: 1. **Magnetic Moments**: Unpaired electrons possess a magnetic moment due to their spin, allowing them to interact with magnetic fields.
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