NMR of bent-core nematogens : a mini-review
Copyright © 2014 John Wiley & Sons, Ltd.
| Publié dans: | Magnetic resonance in chemistry : MRC. - 1985. - 52(2014), 10 vom: 06. Okt., Seite 614-24 |
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| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2014
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| Accès à la collection: | Magnetic resonance in chemistry : MRC |
| Sujets: | Journal Article 13C 2H A131 F1a NMR order parameters phase symmetry restricted motion |
| Résumé: | Copyright © 2014 John Wiley & Sons, Ltd. This review focuses on two of our studied bent-core liquid crystals 2-methyl-3-[4-(4-octylbenzoyloxy)-benzylidene]-amino-benzoic acid 4-(4-dodecylphenylazo)-phenyl ester A131, and a shape-persistent fluorenone mesogen, F1a by means of temperature-dependent (13)C NMR spectra and deuterium NMR spectra, respectively. Orientational order parameters, molecular packing, and/or conformations in the nematic phases or nematic glass can be extracted from the observed NMR spectra. These will be discussed in terms of certain motional models. In particular, F1a has been found to form a biaxial nematic glass. The derived orientational order parameters would put the biaxial system of phase symmetry lower than orthorhombic |
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| Description: | Date Completed 22.05.2015 Date Revised 25.09.2014 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 1097-458X |
| DOI: | 10.1002/mrc.4097 |