title: Multiple-quantum NMR spectra of partially oriented indene: a new approach to estimating order in a nematic phase.
abstract: Multiple-quantum proton NMR spectra of the 8-spin system of indene partially oriented in a nematic mesophase were acquired using a magnetic field gradient (MFG) method. Six-, seven- and eight-quantum spectra were solved to yield all intramolecular dipolar couplings (D(ij)) which were used to determine the molecular shape. The spectral widths of multiple-quantum spectra are dependent on molecular orientation and geometry and a novel method was developed to estimate the Saupe order parameters from the observed spectral widths of the high-order multiple-quantum spectra.
authors.affiliation: School of Chemistry, University of Sydney, Sydney, New South Wales, 2006, Australia. L.Field@chem.usyd.edu.au
authors.forename: Leslie D
authors.initials: LD
authors.lastname: Field
authors.forename: Saadallah A
authors.initials: SA
authors.lastname: Ramadan
authors.forename: Gregory K
authors.initials: GK
authors.lastname: Pierens
mesh_terms: D007192:Indenes / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008968:Molecular Conformation
chemical_list: D007192:Indenes; C093581:indene