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    • Keywords


      Biaxial nematic phase; banana liquid crystals; X-ray diffraction; bent-core liquid crystals

    • Abstract


      The biaxial nematic liquid crystalline phase was predicted several decades ago. Several vigorous attempts to find it in various systems resulted in mis-identifications. The results of X-ray diffraction and optical texture studies of the phases exhibited by rigid bent-core molecules derived from 2,5-bis-(p-hydroxyphenyl)-l,3,4-oxadiazole reveal that the biaxial nematic phase is formed by three compounds of this type. X-ray diffraction studies reveal that the nematic phase of these compounds has the achiral symmetry D2h, in which the overall long axes of the molecules are oriented parallel to each other to define the major axis of the biaxial phase. The apex of the bent-cores defines the minor axis of this phase along which the planes containing the bent-cores of neighboring molecules are oriented parallel to each other.

    • Author Affiliations


      Bharat R Acharya1 Andrew Primak1 Theo J Dingemans2 Edward T Samulski2 Satyendra Kumar1

      1. Department of Physics, Kent State University, Kent, Ohio - 44242, USA
      2. Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC - 27514, USA
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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