Application of adiabatic inversion pulses for elimination of baseline distortions in Fourier transform NMR. A natural abundance17O NMR spectrum for gaseous acetone

The improved RIDE (ring down elimination) sequence is presented that utilizes adiabatic inversion pulses. The most important advantages of the proposed method include the excitation of the broad range of chemical shifts and the B1 insensitive character of adiabatic inversion pulses. The superior baseline and phase properties of this experiment are demonstrated on the 60 kHz spectral width 17O NMR spectra. Additionally, the effectiveness of the adiabatic RIDE sequence is demonstrated by acquisition of the natural isotopic abundance 17O NMR spectrum of gaseous acetone, which is reported for the first time.