Electron-Nuclear-Nuclear TRIPLE Resonance of Radicals in Solutions

  • Klaus Möbius
  • Reinhard Biehl


In molecular spectroscopy, the introduction of more than one resonant electromagnetic field is a well-established technique applied in the full spectral range between radiofrequency (rf) and ultraviolet.(1) The main motivation for extending single resonance to double or multiple resonance techniques can be twofold: (1) either one wants to increase the sensitivity of detection by “quantum transformation” from low-frequency absorbed quanta to high-frequency detected quanta, or (2) one wants to enhance the resolution of the spectra, i.e., reduce the number of spectral lines in a given frequency range by introducing specific coherent time-dependent interactions that average out unwanted static interactions in the Hamiltonian,(2) by imposing additional “selection rules,”(2) or by exploiting degeneracies of certain transitions.(3)


Triple Line Triple Resonance ENDOR Spectrum ENDOR Line Coherence Effect 


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Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

  • Klaus Möbius
    • 1
  • Reinhard Biehl
    • 1
  1. 1.Institut für MolekülphysikFreie Universität BerlinBerlinGermany

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