NMR pulse sequence:
DEPT




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Distortionless Enhancement by Polarization Transfer

Doddrell and coworkers designed the DEPT sequence where the discrimination of J-coupled resonance lines relies on the flip angle beta rather than a refocusing delay delta in INEPT. Since the flip angle beta is independent of J, whereas the delay between pulses depends on J, the DEPT experiment is superior for spectral editing.

DEPT pulse sequence

Compared to the INEPT experiment, there are 180 pulses applied simultaneously with 90 pulses.

Some NMR references about Distortionless Enhancement by Polarization Transfer pulse sequences involving half-integer quadrupole spins, (*) those containing the pulse-sequence diagram:

  • C. A. Fyfe, K. C. Wong-Moon, Y. Huang, and H. Grondey
    INEPT experiments in solid-state NMR,
    J. Am. Chem. Soc. 117, 10397-11398 (1995).
     

Related bibliography

  • D. M. Doddrell, D. T. Pegg, and M. R. Bendall
    Distortionless enhancement of NMR signals by polarization transfer,
    J. Magn. Reson. 48, 323-327 (1982).
     
 

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