Theory of heteronuclear decoupling in solid-state nuclear magnetic resonance using multipole-multimode Floquet theory (original) (raw)

A formal theory for heteronuclear decoupling in solid-state magic angle spinning (MAS) nuclear magnetic resonance experiments is presented as a first application of multipole-multimode Floquet theory. The method allows for the construction of the multispin basis and describes the spin dynamics through effective Floquet Hamiltonians. A model three-spin system under asynchronous time modulations is analyzed, providing insights into the contributions of anisotropic interactions during decoupling. This theory aids in the design and comprehension of pulse sequences for both heteronuclear and homonuclear interactions.