Protons, dipolar coupling

Multi-quantum imaging has first been explored on dipolar coupled protons in adamantane (Fig. 8.4.2) [Gar2]. Together with the anisotropy A of the bilinear spin interaction, the duration tp of the multi-quantum preparation period determines the order to which the... 

One of the more recent applications of proton NMR in solid polymers has been the use of multiple quantum coherence (MQCOH), which is developed among clusters of dipolar coupled protons vide infra) to infer details of chain dynamics [20], and (which is another way of making the same statement) local dipolar couplings [21]. 

Due to its high sensitivity (high y), its high natural abundance and its ubiquitous character in organic soHds, H NMR in soHd state plays a crucial role in the structural characterization of pharmaceutical samples, as in the case of solution NMR. However, the extensive dipolar-coupled proton networks lead to a large broadening of the signals (around tens of kHz in static... 

The sohd-state MAS NMR spectra of proteins usually exhibit large spectral overlap ofbroad signals, owing to proton s short chemical shift range and large homonuclear dipolar couplings. Protons lack the resolving... 

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