New Approach to High-Resolution Proton NMR in Solids: Deuterium Spin Decoupling by Multiple-Quantum Transitions

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Abstract
Deuterium spin decoupling by double-quantum transitions in the manner of Meiboom and co-workers is applied for the first time to solids, opening the way for a new approach to high-resolution proton NMR. With use of this approach, the first resolved proton NMR spectrum of polycrystalline ice is presented and the chemical shielding tensor elements are determined. A simple treatment of the double-quantum process shows why decoupling is possible even though the deuterium spectral width is ∼200 kHz as a result of quadrupolar broadening.