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Updated: Aug 12, 2026

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Published on: September 17, 2017
Multiple-quantum NMR spectra of partially oriented indene: a new approach to estimating order in a nematic phase
Leslie D Field1, Saadallah A Ramadan, Gregory K Pierens
1School of Chemistry, University of Sydney, Sydney, New South Wales, 2006, Australia. L.Field@chem.usyd.edu.au
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.
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