期刊
LIQUID CRYSTALS
卷 40, 期 12, 页码 1655-1677出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02678292.2013.824119
关键词
liquid crystal; nematic; biaxial; cybotaxis; bent-core; mesogen
资金
- Boshamer Professorship Endowment
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 H-2 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.
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