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Issue 6, 2000
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Ferro-, ferri- and antiferro-electric behaviour in a bent-shaped mesogen

Avtar S. Matharu,*a  Chrissie Grover,a  Lachezar Komitovb  and  Gunnar Anderssonb 
Author affiliations

* Corresponding authors

a Department of Chemistry and Physics, The Nottingham Trent University, Clifton Lane, Nottingham, UK
E-mail: avtar.matharu@ntu.ac.uk

b Department of Microelectronics and Nanoscience, Chalmers Institute of Technology, Göteborg, Sweden

Abstract

The synthesis of a novel bent-shaped, four-ring thiophene-based chiral liquid crystalline ester derived from 5-(4-n-decyloxyphenyl)thiophene-2-carboxylic acid and (S)-1-methylheptyl 4′-hydroxybiphenyl-4-carboxylate is reported, i.e., (S)-4′-(1-methylheptyloxycarbonyl)biphenyl-4-yl 5-(4-n-decyloxyphenyl)thiophene-2-carboxylate. Optical microscopy, differential scanning calorimetry, miscibility study, and complementary electro-optical and current response studies reveal the existence of the SmA*, SmC*ferroelectric, SmC*ferrielectric, SmC*antiferroelectric and SmI*antiferroelectric phase types. Another mesophase type possibly exists below SmI*antiferroelectric which generates a rapid electro-optic response. Comparison with the analogous three-ring compound, i.e., (S)-4-(1-methylheptyloxycarbonyl)phenyl 5-(4-n-decyloxyphenyl)thiophene-2-carboxylate increases the thermal stability by 95.8 °C and the SmI*antiferroelectric phase is observed in addition.

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Publication details

The article was received on 06 Jan 2000, accepted on 22 Mar 2000 and first published on 04 May 2000


Article type: Paper
DOI: 10.1039/B000128G
Citation: J. Mater. Chem., 2000,10, 1303-1310
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    Ferro-, ferri- and antiferro-electric behaviour in a bent-shaped mesogen

    A. S. Matharu, C. Grover, L. Komitov and G. Andersson, J. Mater. Chem., 2000, 10, 1303
    DOI: 10.1039/B000128G

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