Frequency offset effects and their elimination in NMR rotating-frame cross-relaxation spectroscopy

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Abstract

The effects of frequency offsets in NMR rotating-frame cross-relaxation experiments are analyzed. A quantitative explanation is given for the offset dependence of peak intensities and multiplet structure in two-dimensional rotating-frame Overhauser effect spectroscopy. A modified pulse sequence is proposed in order to eliminate offset effects and to improve the signal-to-noise ratio.

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