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Electron Paramagnetic Resonance (EPR) Spectrometer

Brad Stadelman at EPR machineElectron paramagnetic resonance (EPR) spectroscopy is a versatile and nondestructive analytical method that can give structural and dynamical information from ongoing chemical processes without influencing the processes.
EPR spectroscopy measures the resonance frequencies of unpaired electrons that are typically found in samples with:

  • Inorganic species containing metal ions with unpaired electrons
  • Organic radical species often containing C, N, or O

The EPR spectrometer in the Department of Chemistry is a Bruker EMX EPR X-band spectrometer equipped with an ER 4131VT variable temperature accessory.  Spectra can be acquired in a range from ambient temperature to ~100 K.  Samples can be either dissolved in solution or in the solid state.
EPR spectra can be analyzed using WinEPR software for data manipulation and analysis. The Department of Chemistry EPR spectrometer is available for users at Clemson University and outside institutions who work with paramagnetic or radical samples.  For more information on instrument training or capabilities, please contact Prof. Julia Brumaghim.