USE OF THE NUCLEAR OVERHAUSER EFFECT IN THK ANALYSIS OF HIGH RESOLUTION NUCLEAR MAGNETIC RESONANCE SPECTRA
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Publisher:Ohio State University
“Relative intensity changes may be observed in a high resolution proton magnetic resonance spectrum when one of the lines is partially saturated by irradiation with a radio frequency field. This is a manifestation of the general Overhauser effect since the intensity changes result from changes in the populations of the eigenstates of the spin Hamiltonian. A simple theory is based on the approximation that population changes are negligible for energy-levels not connected by the irradiated transition. This theory appears to be adequate for applications in the analysis of high resolution spectra. Examples will be given for systems with weak, intermediate, and strong spin coupling to show how the Overhauser effect may be used to determine the relative signs of spin coupling constants, to locate hidden lines in the spectrum and to assign spectral lines to transitions between energy-levels. The experimental techniques will be discussed.”
Author Institution: Departments of Chemistry and Physics, University of New Bruswick
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