Supercycled SW_f-TPPM sequence for heteronuclear dipolar decoupling in solid-state nuclear magnetic resonance

摘要

The performance of a supercycled SWf-TPPM sequence for heteronuclear dipolar decoupling in solid-state NMR is analyzed here. The decoupling performance of this sequence with respect to experimental parameters, such as, the phase angle, proton offset and MAS frequency is studied. A comparison is made with two other commonly used decoupling schemes in solid-state NMR namely, SPINAL-64 and SWf-TPPM, on a sample of U-~(13)C-labeled tyrosine. Our results show that supercycled SW _f-TPPM performs better than the former sequences. Also, numerical spin dynamics studies are presented which support the experimentally observed efficiency in the decoupling.