The determination of the phase transition temperatures of a semifluorinated liquid crystalline biphenyl ester by impedance spectroscopy as an alternative method

Alptekin Yıldız, Nimet Yilmaz Canli*, Gürkan Karanlık, Hale Ocak, Mustafa Okutan, Belkız Bilgin Eran

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Dielectric spectroscopy (DS) is a very powerful and important for better understanding of the molecular dynamics and relaxation phenomena in liquid crystals. The dielectric and impedance characteristics Ethyl 4-(7,7,8,8,9,9,10,10,10-nonafluorodecyloxy)biphenyl-4′-carboxylate (ENBC) liquid crystal have been analyzed over the frequency range of 100 Hz to MHz in the temperature region from room temperature to 180 °C. The compound ENBC shows enantiotropic a smectic mesophase in a wide temperature range. The phase transition temperatures T (°C) of the liquid crystal ENBC, which were characterized by Differential Scanning Calorimetry (DSC), have been verified by the dielectric measurements and conductivity mechanisms of the ENBC. The activation energies for some selected angular frequencies have also been calculated.

Original languageEnglish
Pages (from-to)152-156
Number of pages5
JournalPhysica B: Condensed Matter
Volume503
DOIs
Publication statusPublished - 15 Dec 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Funding

This research has been supported by Yildiz Technical University Scientific Research Projects Coordination Department with the Project Number: 2015-01-02-DOP08 .

FundersFunder number
Yildiz Teknik Üniversitesi2015-01-02-DOP08

    Keywords

    • Differential scanning calorimetry (DSC)
    • Impedance spectroscopy (IS)
    • Liquid crystal
    • Phase transition temperature

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