High-resolution 1H NMR spectra from inhomogeneous fields based on intermolecular multiple-quantum coherences between proton and quadrupolar nuclei

Based on intermolecular double- and single-quantum coherences between 1H and quadrupolar nuclei, two new pulse sequences with time efficient acquisitions are proposed for high-resolution 1H NMR spectra in inhomogeneous fields. Theoretical expressions for the signal were derived according to the product operator formalism. The proposed methods are applicable to both isolated and J-coupled spin systems, with J-coupling constant rescaling. Experiments on test solutions are performed under non-ideal field conditions to show the applicability of the proposed method. These two sequences are complementary to each other and provide alternative approaches for obtaining high-resolution information in relatively large inhomogeneous fields.