Basic Overview of Solid-State NMR

Hd describes the direct magnetic dipolar interactions that occur through-space between a spin-pair. This interaction is also anisotropic and the strength of this perturbation is given in Hz by where 7 71, is the product of the 

Hq is the quadmpolar interaction. It is only present for nuclei with I Vz, which are around 70% of active NMR nuclei. This interaction is also orientahon-dependent however, only the first-order quadrupolar interaction can be averaged out by spinning the sample around the magic angle (MAS)-the second-order quadrupolar interaction cannot be leveled out by this technique, resulting in very broad line shapes or sometimes in invisible sites for SS NMR [109]. In the last 

2 High-Resolution SS NMR Common Techniques and Examples of Applications to Organometallics Crafted on Surfaces 

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