Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Microwave Dielectric Characterization of Binary Mixtures of 3-Nitrotoluene with Dimethylacetamide, Dimethylformamide and Dimethylsulphoxide

  • Chaudhari, Ajay (Dept. of Chemistry, National Chung-Cheng University) ;
  • Chaudhari, H.C. (Department of Computer Science and Information Technology, Dr. B. A. M. University) ;
  • Mehrotra, S.C. (Department of Computer Science and Information Technology, Dr. B. A. M. University)
  • 발행 : 2004.09.20
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초록

Dielectric relaxation measurements on 3-nitrotoluene (3-NT) mixture of dimethylacetamide (DMA), dimethylformamide (DMF) and dimethysulphoxide (DMSO) have been carried out across the entire concentration range using Time domain reflectometry technique at 15, 25, 35 and $45^{\circ}C$ over the frequency range from 10 MHz to 20 GHz. For all the mixtures, only one dielectric loss peak was observed in this frequency range and the relaxation in these mixtures can be well described by a single relaxation time using Debye model. Bilinear calibration method is used to obtain complex permittivity ${\varepsilon}^{*}({\omega})$ from complex reflection coefficient ${\rho}^{*}({\omega})$ over frequency range 10 MHz to 20 GHz. The excess permittivity, excess inverse relaxation time, Kirkwood correlation factor, molar energy of activation are also calculated for these mixtures to study the solute-solvent interaction.

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