Multiple-quantum NMR spectra of partially oriented indene. A new approach to estimating order in a nematic phase

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D. Field, Leslie
A. Ramadan, Saadallah
Pierens, Gregory
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2002
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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 (Dij) 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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Journal of Magnetic Resonance

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156

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1

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Physical Sciences

Engineering

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