Solute induced liquid crystalline behaviour of a quaternary ammonium salt and its application to structure determination

Liangde, LU and Nagana Gowda, GA and Suryaprakash, N and Khetrapal, CL and Weiss, Richard G (1998) Solute induced liquid crystalline behaviour of a quaternary ammonium salt and its application to structure determination. In: Liquid Crystals, 25 (03). pp. 295-300.

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Abstract

A new liquid crystalline phase, induced by the addition of small amounts of a non-mesogenic solute (such as dimethyl sulphoxide or methyl iodide) to a quaternary ammonium salt, N-methyl-N,N,N-trioctadecylammonium iodide (MTAI), has been detected by NMR and optical microscopic studies. In some cases, there is a coexistence of nematic and smectic phases. Information on the ordering of the phases in the magnetic field of the spectrometer has been derived from NMR spectra of a dissolved molecule, C-13-enriched methyl iodide. The low order parameter of the pure thermotropic nematic phase of the salt provides first-order spectra of the dissolved oriented molecules. Analyses of spectra of cis,cis-mucononitrile exemplifies the utility of the MTAI nematic phase in the determination of structural parameters of the solute.

Item Type:	Journal Article
Publication:	Liquid Crystals
Publisher:	Taylor and Francis Group
Additional Information:	Copyright of this article belongs to Taylor and Francis Group.
Department/Centre:	Division of Chemical Sciences > Sophisticated Instruments Facility (Continued as NMR Research Centre)
Date Deposited:	11 Dec 2009 07:19
Last Modified:	19 Sep 2010 05:27
URI:	http://eprints.iisc.ac.in/id/eprint/19239

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