title: Symmetry and phase-selected NMR spectra of liquid crystalline samples.
abstract: 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-12 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 degrees. A method for simulating and analysing multiple quantum filtered spectra is described, with examples from molecules with up to eight interacting spins.
authors.affiliation: Department of Chemistry, University of Southampton, Southampton, SO17 1BJ, United Kingdom.
authors.forename: M
authors.initials: M
authors.lastname: Carravetta
authors.forename: F
authors.initials: F
authors.lastname: Castiglione
authors.forename: G
authors.initials: G
authors.lastname: De Luca
authors.forename: M
authors.initials: M
authors.lastname: Edgar
authors.forename: J W
authors.initials: JW
authors.lastname: Emsley
authors.forename: R D
authors.initials: RD
authors.lastname: Farrant
authors.forename: E K
authors.initials: EK
authors.lastname: Foord
authors.forename: J C
authors.initials: JC
authors.lastname: Lindon
authors.forename: M
authors.initials: M
authors.lastname: Longeri
authors.forename: W E
authors.initials: WE
authors.lastname: Palke
authors.forename: D L
authors.initials: DL
authors.lastname: Turner
mesh_terms: D009682:Magnetic Resonance Spectroscopy