Symmetry and Phase-Selected NMR Spectra of Liquid Crystalline Samples

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-12nuclei, the N or (N-1)-multiple quantum filtered spectra (NQF or (N-1)QF) contain lines which originate only from transitions among the eigenstates bel...

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Published inJournal of magnetic resonance (1997) Vol. 135; no. 2; pp. 298 - 309
Main Authors 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, Turner, D.L
Format Journal Article
LanguageEnglish
Published United States Elsevier Inc 01.12.1998
Subjects
Magnetic Resonance Spectroscopy
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Summary: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-12nuclei, 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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ISSN:1090-7807
1096-0856
DOI:10.1006/jmre.1998.1574