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Ultra-wide line solid state NMR of quadrupolar nuclei: example of strontium-87

Solid-phase nuclear magnetic resonance (NMR) is currently undergoing remarkable instrumental and methodological developments. These include the use of increasingly intense external B₀ fields (B₀ = 23.5 T, Larmor frequency associated with the proton: ~ 1 GHz), increases in sensitivity over several orders of magnitude, and the implementation of new NMR signal acquisition methods.

Quadrupole nuclei (i.e. those with nuclear spin I > 1/2, with I integer or half-integer) make up around 75% of the magnetically active nuclei in the periodic table. Examples include ²H (I = 1), ¹⁴N (I = 1), ²³Na (I = 3/2), ²⁷Al (I = 5/2), ¹⁰B (I = 3), ⁵¹V (I = 7/2), ⁹³Nb (I = 9/2), ⁸⁷Sr (I = 9/2)... Their study by NMR is therefore particularly important in chemistry, biochemistry and materials science. In...