Determination of the sign of the order parameter from MAS spectra of oriented molecules |
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| Affiliation: | 1. Indian Institute of Science, Bangalore 560 012, India;2. Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA;3. National Institutes of Health, Bethesda, Maryland 20892, USA;1. Université de Tunis El Manar, Faculté des Sciences de Tunis, Laboratoire de Physique de la Matière Molle et de la Modélisation Électromagnétique (LR99ES16), 2092 Tunis, Tunisia;2. Laboratoire Charles Coulomb, UMR 5221, CNRS-Université de Montpellier, 34095 Montpellier, France;3. Chemistry Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia;4. Université de Tunis El Manar, Faculté des Sciences de Tunis, Laboratoire de Caractérisations, Applications et Modélisation de Matériaux (LR18ES08), 2092 Tunis, Tunisia;5. Université Claude Bernard Lyon 1, Laboratoire d''Automatique, de Génie des Procédés et de Génie Pharmaceutique (LAGEPP), CNRS UMR 5007, 43 bd 11 Novembre, 69622 Villeurbanne Cedex, France;1. Department of Physics, Faculty of Science and Technology, University of the Basque Country UPV/EHU, Bilbao, Spain;2. School of Physics and Astronomy, University of Leeds, Leeds, UK;3. School of Chemistry, University of Leeds, Leeds, UK;4. Jožef Stefan Institute, Ljubljana, Slovenia;1. Department of Physics, K.L.E.Society’s S Nijalingappa College, Bengaluru, Karnataka, India;2. Lecturer in Physics, Govt. Polytechnic, Madakasira, Andhra Pradesh, India;3. Department of Physics, MES College of Arts, Commerce and Science, Bengaluru, Karnataka, India;4. Centre for Soft Condensed Matter Sciences, Bengaluru, Karnataka, India;5. Department of Physics, Ghousia College of Engineering, Ramanagaram, Karnataka, India |
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| Abstract: | The use of the intensities of the spinning sidebands in the magic-angle spinning spectra of oriented molecules is proposed for the determination of the signs of the order parameters. The method is demonstrated for benzene and chloroform oriented in nematic phases of liquid crystals. On the basis of the theoretical expressions derived for the various order sidebands, the applicability of the method for different experimental conditions is discussed. |
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