title: Two-dimensional NMR spectroscopy in Earth's magnetic field.
abstract: We demonstrate the first two-dimensional correlation NMR (COSY) spectra obtained at ultra low frequencies (ULF) using the Earth's magnetic field. Using a specially developed spectrometer with multiple audio-frequency pulses under controlled pulse phase, we observe magnetisation transfer arising from heteronuclear J-couplings in trifluoroethanol and para-difluorobenzene. The 2D COSY spectra exhibit all diagonal and off-diagonal multiplets consistent with known J-couplings in these molecules.
authors.affiliation: MacDiarmid Institute, Victoria University of Wellington, New Zealand.
authors.forename: Jeremy N
authors.initials: JN
authors.lastname: Robinson
authors.forename: Andrew
authors.initials: A
authors.lastname: Coy
authors.forename: Robin
authors.initials: R
authors.lastname: Dykstra
authors.forename: Craig D
authors.initials: CD
authors.lastname: Eccles
authors.forename: Mark W
authors.initials: MW
authors.lastname: Hunter
authors.forename: Paul T
authors.initials: PT
authors.lastname: Callaghan