Double pulsed-field gradient spin-echo excitation

{
  "id": "MLC-T-CHM-003408",
  "term": "Double pulsed-field gradient spin-echo excitation",
  "field": "Chemistry",
  "definition": "An NMR pulse sequence that places two pulsed-field-gradient spin echoes in series, each containing a selective 180-degree pulse, so that only the chosen resonance stays in the transverse plane while all other magnetisation is dephased by the gradients. It gives clean, selective excitation of one signal or a few signals. It is the basis of excitation sculpting, a solvent-suppression method, and of selective 1D NOE and TOCSY experiments.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "pulse sequence",
    "nuclear magnetic resonance spectroscopy",
    "pulsed-field gradient",
    "spin echo"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 686 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/double-pulsed-field-gradient-spin-echo-excitation/"
}