Simultaneous homonuclear and heteronuclear spin decoupling in magic-angle spinning solid-state NMR

摘要

We show here an effective way of implementing simultaneously homonuclear and heteronuclear dipolar decoupling in magic-angle spinning (MAS) solid-state NMR. Whilst the homonuclear spin decoupling is applied on the H-1 channel, heteronuclear spin decoupling is applied on the C-13 channel. The H-1 spins are observed in a windowed fashion in this case. The resultant H-1 spectrum has higher resolution due to the attenuation of broadening arising from both homonuclear H-1-H-1 and heteronuclear H-1-C-13 interactions, with the latter normally leading to additional line broadening in C-13 labelled samples. The experiments are performed at MAS frequencies of ca. 60 kHz.