In solid NMR the sample is spinned at the so called MAS (magical angle spinning) in order to avoid broad signals which will cause a decrease in the information you can get off the spectrum. So your intuition is correct: there is an angle between the applied magnetic field and the sample of about 55o (MAS). The solid sample does not posses Brownian motion (like in liquid samples) in which the magnetic interactions between neighboring nuclei could be neglected. Thus in solid NMR these interactions have substantial impact on the resulting spectra by broadening the signals. The theory is the same for both techniques. In practice there are some differences in the preparations of the samples and some other techniques but I am not a specialist in the field.

http://en.wikipedia.org/wiki/Solid-state_nuclear_magnetic_resonance (this will help you for the start)

Best wishes,

Marcel

In solid NMR the sample is spinned at the so called MAS (magical angle spinning) in order to avoid broad signals which will cause a decrease in the information you can get off the spectrum. So your intuition is correct: there is an angle between the applied magnetic field and the sample of about 55o (MAS). The solid sample does not posses Brownian motion (like in liquid samples) in which the magnetic interactions between neighboring nuclei could be neglected. Thus in solid NMR these interactions have substantial impact on the resulting spectra by broadening the signals. The theory is the same for both techniques. In practice there are some differences in the preparations of the samples and some other techniques but I am not a specialist in the field.

http://en.wikipedia.org/wiki/Solid-state_nuclear_magnetic_resonance (this will help you for the start)

Best wishes,

Marcel

One can use ss-NMR for probing the surface acidity/ basicity. abundant literature is available on the subject. check out Chem. Rev. 2017, 117, 12475-12531 , DOI: 10.1021/acs.chemrev.7b00289

thanks