title: High-resolution, >1 GHz NMR in unstable magnetic fields.
abstract: Resistive or hybrid magnets can achieve substantially higher fields than those available in superconducting magnets, but their spatial homogeneity and temporal stability are unacceptable for high-resolution NMR. We show that modern stabilization and shimming technology, combined with detection of intermolecular zero-quantum coherences (iZQCs), can remove almost all of the effects of inhomogeneity and drifts, while retaining chemical shift differences and J couplings. In a 25-T electromagnet (1 kHz/s drift, 3 kHz linewidth over 1 cm(3)), iZQC detection removes >99% of the remaining inhomogeneity, to generate the first high-resolution liquid-state NMR spectra acquired at >1 GHz.
authors.affiliation: Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Lin
authors.forename: S
authors.initials: S
authors.lastname: Ahn
authors.forename: N
authors.initials: N
authors.lastname: Murali
authors.forename: W
authors.initials: W
authors.lastname: Brey
authors.forename: C R
authors.initials: CR
authors.lastname: Bowers
authors.forename: W S
authors.initials: WS
authors.lastname: Warren
mesh_terms: D055598:Chemical Phenomena; D002627:Chemistry, Physical; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008280:Magnetics; D011789:Quantum Theory