Abstract
A new NMR experiment that exploits the advantages of proton double quantum (DQ) NMR through a proton DQ-carbon single quantum (SQ) correlation experiment in the solid state is proposed. Analogous to the previously proposed 2D 1H (DQ)–13C refocused INEPT experiment (Webber et al., 2010), the correlation between 1H and 13C is achieved through scalar coupling evolution, while the double quantum coherence among protons is generated through dipolar couplings. However, the new experiment relies on 13C transverse coherence for scalar transfer. The new experiment dubbed MAS-J-1H (DQ)–13C-HMQC, is particularly suited for unlabeled molecules and can provide higher sensitivity than its INEPT counterpart. The experiment is applied to four different samples.
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