alexa Dielectric Studies on Benzothiazole Based Liquid Cryst
ISSN ONLINE(2319-8753)PRINT(2347-6710)

International Journal of Innovative Research in Science, Engineering and Technology
Open Access

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Research Article

Dielectric Studies on Benzothiazole Based Liquid Crystals at Radio Frequency Region

S. Sreehari Sastry1,*, L. Tanuj Kumar1, and Ha Sie Tiong2
  1. Professor, Department of Physics, Acharya Nagarjuna University, Nagarjunanagar-522510, A.P., India
  2. Research Scholar, Department of Physics, Acharya Nagarjuna University, Nagarjunanagar-522510, A.P., India
  3. Professor, Departmant of Chemical Science, Faculty of Science, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, 31900 Kampar, Perak, Malaysia.
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Abstract

The phase transition temperatures and textural changes in homologous series of 2-(4- n alkanoyloxy benzylidenamino) benzothiazoles (n BABTH), where n=12 and 16, were studied by using Polarising Optical Microscope (POM). The temperature and frequency dependence of dielectric constant and dielectric loss were made out in the frequency range 1 KHz to 1 MHz .Anomalies in dielectric properties were recorded near phase transitions when dielectric constant and dielectric loss have been measured as a function of frequency and temperature. Changes in dielectric constant and loss are at low frequencies, but constant at higher frequencies. The variation of activation energy and relaxation times were studied in smectic phase.

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