journal article·2025-10-02

Picosecond dielectric relaxation studies on binary mixtures of dihydric alcohols with DMSO using TDR

Pramod R. Konmare, Aniket D. Bokhare, Nitin P. Garad, Pallavi D. Hambarde, Neha A. Kumbharkhane, Ashok C. Kumbharkhane

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Abstract

The dielectric relaxation behaviour of dihydric alcohols, namely 1,3-propanediol, 1,4-butanediol, and 1,5-pentanediol, dissolved in dimethyl sulfoxide (DMSO) as a solvent, was investigated by using time-domain reflectometry (TDR) in the frequency range of 10–30 GHz. The complex permittivity (ε∗) were determined to analyse molecular interactions and dipolar relaxation dynamics. The Cole-Davidson model was used to fit the measured dielectric spectra. The static dielectric constant (ε0) and relaxation time (τ0) were evaluated. The Kirkwood and Bruggman factor indicates varying degrees of dipole correlation, reflecting the structural and dynamic interplay between solute and solvent.
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Research context

OpenAlex topics: Thermodynamic properties of mixtures · Ionic liquids properties and applications · Solid-state spectroscopy and crystallography

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Affiliations

School of Physical Sciences, Swami Ramanand Teerth Marathwada University

Byramjee Jeejeebhoy Government Medical College

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