Carravetta, M., Castiglione, F., De Luca, G., Edgar, M., Emsley, J.W., Farrant, R.D., Foord, E.K., Lindon, J.C., Longeri, M, Palke, W.E. and Turner, David L.
Symmetry and phase-selected NMR spectra of liquid crystalline samples
Journal of Magnetic Resonance, 135, (2), . (doi:10.1006/jmre.1998.1574).
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It is demonstrated that the NMR spectra of liquid crystalline samples can be simplified by using multiple quantum filtering. In a system of N spin-Image nuclei, the N or (N-1)-multiple quantum filtered spectra (NQF or (N-1)QF) contain lines which originate only from transitions among the eigenstates belonging to the highest symmetry class of the spin permutation group. In addition the NQF spectra are divided further into two sets of lines which differ in phase by 180°. A method for simulating and analysing multiple quantum filtered spectra is described, with examples from molecules with up to eight interacting spins.
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