Application of adiabatic inversion pulses for elimination of baseline distortions in Fourier transform NMR. A natural abundance O-17 NMR spectrum forgaseous acetone

The improved RIDE (ring down elimination) sequence is presented that utiliz es adiabatic inversion pulses. The most important advantages of the propose d method include the excitation of the broad range of chemical shifts and t he B-1 insensitive character of adiabatic inversion pulses. The superior ba seline and phase properties of this experiment are demonstrated on the 60 k Hz spectral width O-17 NMR spectra. Additionally, the effectiveness of the adiabatic RIDE sequence is demonstrated by acquisition of the natural isoto pic abundance O-17 NMR spectrum of gaseous acetone, which is reported for t he first time. Copyright (C) 2000 John Wiley & Sons, Ltd.