Narrow Lines in Solid-State Nuclear Magnetic Resonance: Moderate Radio-Frequency Fields Suffice for Decoupling Despite High Spinning Frequencies

pissaro

Comparison of echo decay curves for 13C in histidine obtained with a single rotor-synchronized refocusing pulse at a spinning frequency of 60 kHz. The curves with T2 relaxation times 43.5, 41.7 and 37.0 ms (red symbols) were obtained with our PISSARRO decoupling scheme.

(Source (P380):

Sensitivity Improvement during Heteronuclear Spin Decoupling in Solid-State Nuclear Magnetic Resonance Experiments at High Spinning Frequencies and Moderate Radio-Frequency Amplitudes. R. N. Purusottam, G. Bodenhausen, and P. Tekely, Chem. Phys. Lett. 614, 220-225 (2014). adiabatically.

Echo

Efficiency of heteronuclear decoupling for different carbon sites in histidine using our PISSARRO decoupling sequence applied to a sample spinning at 60 kHz as a function of the rf amplitude used for pruton decoupling decreasing from 190 to 80 kHz from left to right at 400 MHz.

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