Electron nuclear double resonance

The electron-nuclear double resonance ( electron nuclear double resonance English, ENDOR ) is a special form of ESR spectroscopy.

Of operation and application

The ENDOR spectroscopy combines the advantages of nuclear magnetic resonance spectroscopy (NMR spectroscopy, high resolution) and electron spin resonance (ESR, high sensitivity ) by both spectroscopy forms are applied simultaneously at a sample. The ESR signal is used as an indicator of a suitable NMR, which due to its high resolution can at this point determine the number of signal lines significantly better. Thus, the ENDOR spectroscopy is able to measure interactions of the paramagnetic electrons with neighboring nuclei. This is known as the super hyperfine interaction.

Applications of ENDOR spectroscopy is the study of endohedral complexes and defects in semiconductors or chirality.

The technique was developed in the mid -1950s by George Feher.