NMR Heteronuclear Correlation between Quadrupolar Nuclei in Solids.

D. Iuga (1) , C. Morais (1) , Z. Gan (2) , D.R. Neuville (3) , L. Cormier (4) , Dominique Massiot (1)

1 CRMHT - Centre de recherches sur les matériaux à haute température
2 NHMFL - National High Magnetic Field Laboratory
3 IPGP - Institut de Physique du Globe de Paris
4 IMPMC - Institut de minéralogie et de physique des milieux condensés

We show for the first time that it is possible to acquire high-resolution heteronuclear NMR correlation experiments in solid state between second-order-broadened half integer quadrupolar nuclei (i.e., 27Al and 17O) using the scalar J-coupling. The sensitivity of the experiment is dramatically improved at high fields (gain proportional to the fourth power of the principal field) with a combination of signal enhancement techniques. This turns a challenging experiment into a real tool. We apply this experiment to characterize a calcium aluminate glass in which we prove the presence of tricluster 3 oxygen sites and describe the signature of their directly bonded aluminum sites. Applications involve a large range of possible pairs of quadrupolar nuclei in different materials, such as glasses, porous or mesoporous framework materials, zeolites, hybrid organic-inorganic, and bioinvolved materials.

Domaines: Matériaux

D. Iuga, C. Morais, Z. Gan, D.R. Neuville, L. Cormier, et al.. NMR Heteronuclear Correlation between Quadrupolar Nuclei in Solids.. Journal of the American Chemical Society, 2005, 127, pp.11540-11541. ⟨10.1021/ja052452n⟩. ⟨hal-00012209⟩