Spectrum editing with spin-echoes

Figure 4.16. Carbon spectrum of camphor 4.1 edited with the J-modulated spin-echo sequence, (a) Conventional carbon spectrum (carbonyl not shown), and edited spectra with (b) A = 1/J (6 = 180°) and (c) A = 1/2J (0 = 90°) with J assumed to be 130 Hz. Some breakthrough of protonated carbons is observed in (c) due to variations in coupling constants within the molecule.

Figure 13.3-2. NMR spectra of rat serum illustrating the various NMR responses that are possible through the use of different pulse sequences, which edit the spectral intensities (a) standard water suppressed spectrum, showing all metabolites (b) CPMG spin-echo spectrum, with attenuation of peaks from fast relaxing components such as macromolecules and lipoproteins (c) diffusion-edited spectrum, with attenuation of peaks from fast diffusing components such as small molecules and (d) a projection of a 2D J-resolved spectrum on to the chemical shift axis, showing removal of all spin-spin coupling and peaks from fast relaxing species.

Figure 4.18. Carbon spectrum of camphor 4.1 edited with the 7-modulated spin-echo sequence.

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