Two-Dimensional NMR Study of a Liquid-Crystal Solution under Magic-Angle Spinning. Conformation of Carboxylic Ionophore Lasalocid A Dissolved in a Lyotropic Liquid Crystal
✍ Scribed by Atsuomi Kimura; Tetsushi Kano; Hideaki Fujiwara
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 152 KB
- Volume
- 112
- Category
- Article
- ISSN
- 1064-1866
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✦ Synopsis
The conformation of a carboxylic ionophore, lasalocid A, has because of fully isotropic rotational diffusion of the mibeen determined in a lyotropic liquid crystal by means of magiccelle aggregates, although dissolved molecules are embedangle spinning (MAS) and two-dimensional NMR experiments. ded in microscopically anisotropic arrangements of the The information extracted from ROESY spectra measured under alkyl chains of the micelle constituent molecules.
MAS was analyzed according to the distance-geometry algorithm.
The aim of this work was to widen the applicability of The liquid crystal used for the solvent is cesium perfluorooctanoate liquid-crystal NMR by combining magic-angle spinning dissolved in D 2 O, and the resulting structure of lasalocid A is a (MAS) with two-dimensional observations. The magiccyclic one, indicating cation complexation within a hydrophobic angle-spinning technique can make NMR spectra of the liqregion of the liquid crystal. In this way, the two-dimensional MAS uid-crystal sample as tractable as those of an ordinary iso-NMR experiment is proved to be a useful technique in conformatropic sample. Also the information on anisotropic orientational studies of complex molecules dissolved in lyotropic liquid crystal which may be regarded as offering a membrane-like envi-tion will be recovered when the sample spins about an angle ronment.