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Microwave dielectric characterization of binary mixture of formamide with N, N-dimethylaminoethanol

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Abstract

Dielectric relaxation measurements of formamide (FMD)-N,N-dimethylaminoethanol (DMAE) solvent mixtures have been carried out over the entire concentration range using time domain reflectometry technique at 25, 35 and 45°C in the frequency range of 10 MHz to 20 GHz. The mixtures exhibit a principle dispersion of the Davidson-Cole relaxation type at microwave frequencies. Bilinear calibration method is used to obtain complex permittivity ɛ*(ω) from complex reflection coefficient ρ*(ω) over the frequency range of 10 MHz to 10 GHz. The excess permittivity (ɛ E), excess inverse relaxation time (1/τ)E, Kirkwood correlation factor (g eff), activation energy and Bruggeman factor (f B) are also calculated to study the solute-solvent interaction.

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Authors and Affiliations

  1. Microwave Research Lab, Department of Physics, Dr. B.A.M. University, Aurangabad, 431 004, India

    Prabhakar Undre & P W Khirade

  2. Microwave Research Lab, Department of Physics, Deogiri College, Aurangabad, 431 005, India

    S N Helambe & S B Jagdale

  3. Department of Computer Science and Electronics, Dr. B.A.M. University, Aurangabad, 431 004, India

    S C Mehrotra

Authors
  1. Prabhakar Undre
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  2. S N Helambe
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  3. S B Jagdale
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  4. P W Khirade
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  5. S C Mehrotra
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Correspondence to Prabhakar Undre.

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Undre, P., Helambe, S.N., Jagdale, S.B. et al. Microwave dielectric characterization of binary mixture of formamide with N, N-dimethylaminoethanol. Pramana - J Phys 68, 851–861 (2007). https://doi.org/10.1007/s12043-007-0083-8

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