Magic angle spinning influence

Figure 4. The influence of magic angle spinning on the SL cross polarization time constant. In the PlP-cured epoxy the time constant for the nonprotonated carbons increases by about 50% for = 1-3 kHz while those of the protonated carbons are virtually unchanged over this range.

The influence of the chemical shift anisotropy (CSA) (3) can be removed by the so-called Magic-Angle Spinning (MAS), as mentioned before. 

Magic angle spinning (MAS) NMR has been proved to be an extremely powerful tool, able to probe both the bulk of the materials used as electrodes and the surface layers arising after contact with atmosphere or with the electrolyte of a lithium battery [62]. The amount of surface interphase formed on cathodes was proved to influence drastically the electrochemical performance. Either an excessive amount or an insufficient amount of surface species is detrimental to the performance, while there is optimal formation of surface films for each kind of electrodes in standard electrolyte solutions. The interphase formed as a function of... 

Yamamoto H, Horn F. (1994). In sim crystallization of bacterial cellulose I. Influences of polymeric additives, stirring and temperature on the formation celluloses I a and I 3 as revealed by cross polarization/magic angle spinning (CP/MAS) 13 C NMR spectroscopy. Cellulose, 1, 57-66. 

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