Intercalated smectic a phases in banana-shaped liquid crystals with carbonate end groups

Katalin Fodor-Csorba, Antal Jákli, Anikó Vajda, S. Krishna Prasad, Doddamane S. Shankar Rao, Ronald Y. Dong, Jiadi Xu, Giancarlo Galli

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17 Citations (Scopus)

Abstract

Novel, symmetrical, bent-core mesogens, namely substituted 1,3-phenylenebis{4′-[(ethoxycarbonyl)oxy]-1,1′-biphenyl} -4-carboxylates, are prepared with carbonate groups at both ends of the molecules. The mesophase properties are investigated for different electron-donating and -withdrawing substituents connected to the central ring at different positions. These compounds exhibit nematic and/or smectic A intercalated (SmAint) mesophases. Electro-optical studies show a very significant electric-field-induced biaxiality that is fast (< 1 ms) and large (0.03) associated with a high birefringence (0.33 at 500 nm, 10 V μ-1 field) for the unsubstituted analogue. For one substance this effect is observable from above 100°C down to room temperature. Such electric-field-induced biaxiality may find practical applications in fast electro-optic modulation devices.

Original languageEnglish
Pages (from-to)2184-2188
Number of pages5
JournalChemPhysChem
Volume7
Issue number10
DOIs
Publication statusPublished - Oct 13 2006

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Keywords

  • Electro-optics
  • Intercalations
  • Liquid crystals
  • Mesophases
  • NMR spectroscopy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

Cite this

Fodor-Csorba, K., Jákli, A., Vajda, A., Prasad, S. K., Shankar Rao, D. S., Dong, R. Y., Xu, J., & Galli, G. (2006). Intercalated smectic a phases in banana-shaped liquid crystals with carbonate end groups. ChemPhysChem, 7(10), 2184-2188. https://doi.org/10.1002/cphc.200600377