Assignment of 13C resonances of a nematic liquid crystal using off-magic angle spinning

2004 John Wiley & Sons, Ltd.

Détails bibliographiques
Publié dans:Magnetic resonance in chemistry : MRC. - 1985. - 42(2004), 4 vom: 15. Apr., Seite 409-13
Auteur principal: Vinay Deepak, H S (Auteur)
Autres auteurs: Joy, Anu, Suryaprakash, N, Ramanathan, K V
Format: Article
Langue:English
Publié: 2004
Accès à la collection:Magnetic resonance in chemistry : MRC
Sujets:Comparative Study Evaluation Study Journal Article Research Support, Non-U.S. Gov't Aniline Compounds Carbon Isotopes Powders Solutions Spin Labels
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520 |a A novel method for assigning the resonances in the 13C NMR spectrum of a static liquid crystalline sample in its nematic phase is proposed. The method is based on the fact that the carbon chemical shifts in the isotropic phase and in the oriented phase under static and off-magic angle spinning (OMAS) conditions are uniquely related by the tensorial property of the CSA tensor, requiring just one OMAS spectrum and the assignment in the isotropic phase. A computational procedure is proposed to take into account deviations arising out of non-ideal experimental conditions and the assignments are made by identifying the minimum in the differences in the frequencies between calculated and experimental line positions. Practical implementation of the method has also been demonstrated in the case of the liquid crystal N-(4-ethoxybenzylidene)-4-n-butylaniline 
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650 4 |a Evaluation Study 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
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