High-resolution two-dimensional NMR spectra of half-integer-spin quadrupolar nuclei from one-dimensional projections

T. Vosegaard (1) , D. Massiot (2, 3)

1 INSPIN - Center for Insoluble Protein Structures (inSPIN)
2 CRMHT - Centre de recherches sur les matériaux à haute température
3 FRMN-SHC - Fédération RMN du Solide à Hauts Champs

We present a technique providing high-resolution spectra of quadrupolar nuclei with half-integer nuclear spin displaying significant second-order linebroadening. The technique, dubbed chemical shift – quadrupolar projection-reconstruction of one-dimensional spectra (CQ-PRODI) exploits the different magnetic field dependence of the chemical shift and second-order quadrupolar effect. One-dimensional spectra recorded at different magnetic field strengths are represented as projections along different directions in the two-dimensional spectrum that correlates the chemical shift and the second-order quadrupolar lineshape. We present CQ-PRODI spectra for 27Al in 9Al2O3·2B2O3 and for 71Ga in β-Ga2O3 which display resolution of all sites in the chemical shift dimension.

Mots clés: Projection-Reconstruction; Second-order quadrupole interaction; PRODI; Radial Sampling

Domaines: Matériaux

T. Vosegaard, D. Massiot. High-resolution two-dimensional NMR spectra of half-integer-spin quadrupolar nuclei from one-dimensional projections. Chemical Physics Letters, 2007, 437, pp.120-125. ⟨10.1016/j.cplett.2007.01.077⟩. ⟨hal-00127883⟩