Abstract

Heteronuclear dipolar decoupling in MAS solid state NMR studies of biological systems has been investigated at moderate spinning speeds. It is shown that the efficacy of C N n ν symmetry-based decoupling schemes with tanh/tan adiabatic pulses can be significantly improved by optimising the amplitude and frequency modulation characteristics of the inversion pulses employed. The decoupling performance of the symmetry-based schemes is compared with that of the commonly used TPPM technique.

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