High resolution heteronuclear correlation NMR spectroscopy between quadrupolar nuclei and protons in the solid state

A. Goldbourt, E. Vinogradov, G. Goobes, S. Vega

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

A high resolution two-dimensional solid state NMR experiment is presented that correlates half-integer quadrupolar spins with protons. In this experiment the quadrupolar nuclei evolve during t1 under a split-t1, FAM-enhanced MQMAS pulse scheme. After each t1 period ending at the MQMAS echo position, single quantum magnetization is transferred, via a cross polarization process in the mixing time, from the quadrupolar nuclei to the protons. High-resolution proton signals are then detected in the t2 time domain during wPMLG5* homonuclear decoupling. The experiment has been demonstrated on a powder sample of sodium citrate and 23Na- 1H 2D correlation spectra have been obtained. From the HETCOR spectra and the regular MQMAS spectrum, the three crystallographically inequivalent Na+ sites in the asymmetric unit were assigned. This MQMAS-wPMLG HETCOR pulse sequence can be used for spectral editing of half-integer quadrupolar nuclei coupled to protons.

Original languageEnglish (US)
Pages (from-to)342-350
Number of pages9
JournalJournal of Magnetic Resonance
Volume169
Issue number2
DOIs
StatePublished - Aug 1 2004

Keywords

  • FAM pulses
  • HETCOR
  • Half-integer quadrupolar nuclei
  • High-resolution proton NMR
  • MQMAS
  • PMLG
  • Solid state NMR
  • wPMLG

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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