Herein we review the attributes of the cluster biaxial nematic exhibited by bent-core mesogens derived from the oxadiazole biphenol mesogenic core. We present an array of static 2H NMR spectra as well as 2D powder spectra generated by rotating the nematic phase of directly labelled mesogens. Analysis of these motionally averaged NMR observations requires the nematic phase to have monoclinic symmetry. X-ray diffraction data, in particular the effects of electric and magnetic field effects, are also consonant with the cluster picture of this biaxial nematic phase.
The biaxial nematic phase of oxadiazole biphenol mesogens / Dingemans, T. J.; Madsen, L. A.; Francescangeli, Oriano; Vita, Francesco; Photinos, D. J.; Poon, C. D.; Samulski, E. T.. - In: LIQUID CRYSTALS. - ISSN 0267-8292. - STAMPA. - 40:12(2013), pp. 1655-1677. [10.1080/02678292.2013.824119]
The biaxial nematic phase of oxadiazole biphenol mesogens
FRANCESCANGELI, ORIANO;VITA, Francesco;
2013-01-01
Abstract
Herein we review the attributes of the cluster biaxial nematic exhibited by bent-core mesogens derived from the oxadiazole biphenol mesogenic core. We present an array of static 2H NMR spectra as well as 2D powder spectra generated by rotating the nematic phase of directly labelled mesogens. Analysis of these motionally averaged NMR observations requires the nematic phase to have monoclinic symmetry. X-ray diffraction data, in particular the effects of electric and magnetic field effects, are also consonant with the cluster picture of this biaxial nematic phase.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
