Introduction to Electron Paramagnetic Resonance Spectroscopy

Abstract

The acronym EPR describes a spectroscopic technique known as electron paramagnetic resonance.In several, especially older, textbooks and research papers the alternative names ESR(electron spin resonance) or EMR (electron magnetic resonance) can be sometimes encountered.The development of EPR spectroscopy was slowed during the few decades following its inventiondue to the unavailability of microwave components for higher frequencies. Today, however, EPR technologies are enjoying very rapid development in all areas of application. Such regained interest is related to the fact that EPR not only proved to be an extremely powerful spectroscopic technique but to an increasing amount of related techniques that were born around EPR methodology. Recent developments in the area of instrumentation followed by the commercialization of high-end EPR spectrometers have attracted many new adepts who benefit from exploring this technique in their specific fields of research.