Electron paramagnetic resonance (EPR) (or synomously electron spin resonance (ESR)) is a magnetic resonance technique used to study materials with unpaired electrons. Examples include free radicals, transition metal ions and clusters found in such diverse areas as nanomaterials, materials science, biology, chemistry, food science, radiation dosimetry and medicine.
Structural and electronic characterisation of a sample by EPR spectroscopy is afforded by measuring couplings between the unpaired electrons and magnetic nuclei. Samples for study can be powders, frozen solutions or crystals, and being a probe technique there is no limit to a molecule’s size. Non-invasive EPR imaging offers the capacity to spatially locate paramagnetic molecules in small animals and bulk materials.
For more information on using EPR spectroscopy and imaging in your research, please refer to the key areas of expertise at the CAI listed below, download the EPR Facility brochure or contact the Facility Management.
- Structural Biology using Spin Probes
- Molecular (Geometric and Electronic) Structure of Paramagnetic Centres
- EPR Imaging
- Dynamic Nuclear Polarisation (DNP)
- Computation Software
EPR Instruments available at CAI:
- Bruker Elexsys E500 CW (Q-, X-, S-band) variable temperature (1.5-400K) EPR Spectrometer
- Bruker Elexsys E580 Pulsed Q-, X-band (with high power microwave amplifiers) for variable temperature (1.5-300K) EPR / ENDOR / ELDOR / ESEEM / DEER Spectrometer
- Bruker Elexsys E540 (X-, L-band) Imaging Scanner