NMR investigation of a thermotropic liquid crystal showing isotropic-isotropic'-(columnar)-cubic phase transitions

Mario Cifelli, Valentina Domenici, Ewa Gorecka, Micham Wojcik, Sergey V. Dvinskikh

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1 Citation (Scopus)

Abstract

In this work, we report a first detailed study of the mesophasic behaviour of the calamitic liquid crystal, a (4,4′-bis(4″-carboxybelzyloxy)biphenyl derivate, labelled 9/2 RS/RS, showing an isotropic-isotropic-(columnar)-cubic phase behaviour on cooling. 1H NMR diffusometry allowed to distinguish between the two isotropic phases in terms of diffusion characterized by different Arrhenius activation energy, while 13C NMR static measurements and 2H NMR investigations were of help in understanding the orientational ordering properties of the metastable columnar phase and confirmed the isotropic state of the sample in the cubic phase.

Original languageEnglish
Pages (from-to)20-30
Number of pages11
JournalMolecular Crystals and Liquid Crystals
Volume649
Issue number1
DOIs
Publication statusPublished - 24 May 2017

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Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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