Temperature dependent dielectric relaxation study of ethylene glycol-water mixtures

Kumbharkhane, A.C.; Puranik, S. M.; Mehrotra, S. C.

doi:10.1007/bf00647008

Cited by 65 publications

(37 citation statements)

References 10 publications

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“…Dielectric relaxation studies on diols have revealed that the microwave frequency region dielectric dispersion is attributed to the reorientation of the molecules as whole and also the end -OH groups [1][2][3]. Diol are soluble in water in a wide concentration range [1]. Due to the presence of ends -OH groups, the molecules of these liquids can enter into intra and intermolecular hydrogen bonding giving rise to several conformations in water mixture [2][3].…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, molecules of solute can bind to neighboring water molecules also mostly through hydrogen bonding (bound water) [4]. When diol is mixed with water, the dielectric relaxation strength, the relaxation time and the distribution of the relaxation time are changed because relaxation parameters are related to water structure in the mixture [1][2].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dielectric relaxation and hydrogen bond interaction study of diol-water mixtures

et al. 2010

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Complex dielectric permittivity measurements in the frequency range 10MHz-20GHz have been carried out in diol-water mixtures over the entire concentration range using a time domain reflectometry (TDR) method at 25 0 C. A hydrogen bonded theory is applied to compute the dielectric constant for the mixtures. It adequately reproduces the experimental values of static dielectric constants for the diol-water mixtures. The dielectric parameters confirm that the intermolecular homogeneous and heterogeneous hydrogen bonding vary significantly with the increase in concentration of the constituents of the diol-water mixtures.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dielectric relaxation and hydrogen bond interaction study of diol-water mixtures

et al. 2010

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“…[16][17][18][19][20][21] Dielectric spectroscopy offers valuable insights into the microdynamics of fluctuating hydrogen bonds in liquids. 22,23 This work is an attempt on the influence of co-solvent on stearic acid mixture with nonpolar solvent over the concentration range by varying temperature from 303 K to 288 K. The changes in dielectric and relaxation parameters are associated with frequency, temperature and concentration. The conformation analyses of formation of hydrogen bonding between complex mixtures are identified using FT-IR spectra.…”

Section: Introductionmentioning

confidence: 99%

Dielectric dispersion and thermodynamic behavior of stearic acid binary mixtures with alcohol as co-solvent using time domain reflectometry

Sylvester

Ganesh²,

Karunakaran

et al. 2017

J. Adv. Dielect.

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Dielectric permittivity and relaxation dynamics of binary and ternary mixture of stearic acid on various concentration and their thermodynamic effects are studied. The static dielectric constant (" 0 ), dielectric permittivity (" 0 ) and dielectric loss (" 00 ) are found by bilinear calibration. The relaxation time (), dielectric strength (Á") and the excess permittivity (" E ) are found. The thermodynamic parameters such as enthalpy (ÁH), entropy (ÁS) and Gibb's free energy (ÁG) are evolved. The significant changes in dielectric parameters are due to the intramolecular and intermolecular interactions in response to the applied frequency. The permittivity spectra of stearic acid-alcohol in the frequency range of 10 MHz to 30 GHz have been measured using picoseconds Time Domain Reflectometry (TDR). The dielectric parameters (" 0 , " 0 , " 00 ) are found by bilinear calibration method. Influence of temperature in intermolecular interaction and the relaxation process are also studied. The FT-IR spectral analysis reveals that the conformation of functional groups and formation for hydrogen bonding are present in both binary and ternary mixtures of stearic acid.

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“…Earlier we have investigated the water structures in various materials such as water-alcohols [2,3], water-amide [4,5], and water-protein [6]. Extensively experimental study has been carried out on dioxane (molecule 1) and its water (molecules 2) mixtures to understand intra and intermolecular interactions through hydrogen bond using dielectric spectroscopy techniques [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Theoretical investigation of molecular interactions in dioxane and water using hydrogen bonding model and density functional method

Chaudhari

Naganathappa

Shinde

et al. 2011

Int J of Quantum Chemistry

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The molecular interactions between water and dioxane are studied using hydrogen bonding model and density functional method. The average number of hydrogen bonds obtained using hydrogen bonding model is maximum at 0.83 mole fraction of water in dioxane. This concentration corresponds to five water molecules and a dioxane molecule in a complex [Mashimo et al., J Chem Phys 1992, 96, 6358; Kanse et al., J Ind Chem Soc 2007, 83, 168]. The values of dielectric constant for the mixture obtained by hydrogen bonding model are in excellent agreement with the experimental values. Density functional theory calculations show that the most stable conformer of dioxane-5H 2 O hydrogen bonded complex has six short hydrogen bonds. Number of hydrogen bonds from density functional calculations and hydrogen bonding model are in excellent agreement at 0.83 mole fraction of water. In this hydrogen bonded complex five water molecules bridging the two oxygen atoms of dioxane molecule and thus is a cyclic structure, which is also in agreement with the experiment.

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Temperature dependent dielectric relaxation study of ethylene glycol-water mixtures

Cited by 65 publications

References 10 publications

Dielectric relaxation and hydrogen bond interaction study of diol-water mixtures

Dielectric relaxation and hydrogen bond interaction study of diol-water mixtures

Dielectric dispersion and thermodynamic behavior of stearic acid binary mixtures with alcohol as co-solvent using time domain reflectometry

Theoretical investigation of molecular interactions in dioxane and water using hydrogen bonding model and density functional method

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