NMR chemical shift anisotropy measurements by RF driven rotary resonance

A rotary resonant effect in magic angle sample spinning NMR experiments occurs when the magnitude of an applied radio frequency field matches a multiple of the spinning frequency. The modulated anisotropic chemical shift drives the rotary resonance. Based on this effect, a two-dimensional experiment is introduced to correlate the isotropic chemical shift and the chemical shift anisotropy. Experimental results are compared with computer simulations based on average Hamiltonian theory and Floquet theory of rotary resonance. An experimental scheme is introduced for creating rotary resonance echoes.