Dielectric relaxation of tert-butyl alcohol–water mixtures using a time-domain technique

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

doi:10.1039/ft9918701569

Cited by 162 publications

(46 citation statements)

References 10 publications

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Section: B Measurementsmentioning

confidence: 99%

“…DSA8200 Digital Serial Analyzer sampling mainframe along with the sampling module 80E08 has been used. The details of the apparatus and data analysis procedures of the TDR have been reported previously [13]. The complex permittivity spectra measured using TDR is fitted by the non-linear least squares fit method to the Havriliak -Negami expression [14], [15]:…”

Section: B Measurementsmentioning

confidence: 99%

“…DSA8200 Digital Serial Analyzer sampling mainframe along with the sampling module 80E08 has been used. The details of the apparatus and data analysis procedures of the TDR have been reported previously [13].III. RESULTS AND DISCUSSION Fig.1 (a, b) shows frequency dependent complex permittivity spectra for DMF-DX and NMA-DX at 25 0 C. It can be seen from Fig.…”

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confidence: 99%

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Dielectric Relaxation Study of Aqueous Amides in Non-Polar Solute Using Picoseconds Time Domain Technique

Mahajan¹,

Kumbharkhane²

2012

IJBBB

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Abstract-The dielectric permittivity of amide -1, 4-dioxane (DX) for various concentrations has been studied in the frequency range from 10 MHz to 30 GHz using the time domain reflectometry (TDR) method. A hydrogen bonded theory suggested by Luzar is applied to compute correlation terms for the mixtures. Static permittivity for the mixtures can be explained using the Luzar model by assuming the formation of two types of hydrogen bonded dimmers, one between amide-amide (pair 1) and other between amide-1, 4-dioxane (pair 2). The numbers of these pairs are also estimated as a function of concentration. Index Terms-Dielectric permittivity, relaxation time, time domain reflectometry (TDR), bruggeman factor I. INTRODUCTIONAmide represents an important class of bio-organic solvent. The hydrogen bond formation ability of these solvents is useful in understanding the peptide linkage in complex bio-systems [1]- [3]. The study of hydrogen bonding molecular interactions of binary mixtures is currently a significant challenge in the research field of science and technology. Hydrogen bond constitutes a very interesting class of intermolecular interactions, which are of extreme importance in many fields of chemistry and molecular biology. "Hydrogen Bonding in Biological Structures" can be used in many ways by biophysicists [4]. The study of the H-bonds of the type O=H ---O=C occupies a position of considerable importance as it relates to the study of biopolymers [5]. In the case of amides, N, N-dimethylformamide (DMF) is able to form the H-bonded network structures with dipolar aprotic and protic solvents [6]. Malathi M. et al. have studied mutual interaction of amides with non polar solvents to understand the conformational stability of protein molecules [7]. Thenappan and Sankar were studied hydrogen-bonded complexes of alcohol with N, N-dimethylformamide (DMF) [8]. DMF is a widely used solvent for many recently developed synthetic procedures because of its powerful solvating properties [9]. N-methylacetamide (NMA) is the most frequently used analog compound for the peptide unit in Manuscript received February 4, 2012; revised March 25, 2012 proteins. Paul Firman and S. Sahoo were studied the mixture of N-methylacetamaide (NMA) with non-polar solvent [10], [11]. The non polar solvent 1, 4-dioxane (DX) is used as a laboratory reagent and as a solvent for the production of cellulose acetate, ethyl cellulose, benzyl cellulose, dyes, oils, fats and polyvinyl polymers. The intermolecular interaction plays an important part in intermolecular recognition processes essential to most of biological systems. It also found that Physical and chemical phenomenon of binary systems are closely related to the intermolecular interactions.In the present work, we report a comparative dielectric relaxation study of amide (DMF and NMA) with non polar solute (DX) at various concentrations at 25 o C employing Time Domain Reflectometry (TDR) in the frequency range of 10 MHz-30 GHz. The complex permittivity spectra of DMF-DX and NMA-DX have been fitt...

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Section: B Measurementsmentioning

confidence: 99%

Section: B Measurementsmentioning

confidence: 99%

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Dielectric Relaxation Study of Aqueous Amides in Non-Polar Solute Using Picoseconds Time Domain Technique

Mahajan¹,

Kumbharkhane²

2012

IJBBB

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“…Further the Fourier transformation of the pulses and data analysis were done earlier to determine complex permittivity spectra Ã ð!Þ using nonlinear least squares fit method. 7,9 The dielectric permittivity " 0 and dielectric loss " 00 of benzylamineþ1,2,6-hexanetriol mixtures at 25 C were measured using TDR technique as shown in Fig. 2.…”

Section: Materials and Measurementsmentioning

confidence: 99%

“…5 The constructive technique of Time Domain Reflectometry (TDR) is used to study the dielectric relaxation parameters of liquids. [6][7][8][9] Significant dielectric relaxation work has been done in our laboratory on diol and 2-butoxyethanol in water mixtures using TDR. 10,11 Pawar and Patil have studied temperature-dependent dielectric relaxation on molecular interaction in binary mixture of dimethylene chloride with n-methyl formamide using TDR technique.…”

Section: Introductionmentioning

confidence: 99%

Dielectric properties of benzylamine in 1,2,6-hexanetriol mixture using time domain reflectometry technique

Swami¹,

Hudge

Pawar³

2016

J. Adv. Dielect.

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The dielectric properties of binary mixtures of benzylamine-1,2,6-hexantriol mixtures at different volume fractions of 1,2,6-hexanetriol have been measured using Time Domain Reflectometry (TDR) technique in the frequency range of 10 MHz to 30 GHz. Complex permittivity spectra were fitted using Havriliak-Negami equation. By using least square fit method the dielectric parameters such as static dielectric constant (" 0 ), dielectric constant at high frequency (" 1 ), relaxation time (ps) and relaxation distribution parameter () were extracted from complex permittivity spectra at 25 C. The intramolecular interaction of different molecules has been discussed using the Kirkwood correlation factor, Bruggeman factor. The Kirkwood correlation factor (g f ) and effective Kirkwood correlation factor (g eff ) indicate the dipole ordering of the binary mixtures.

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Types of Imaging, Part 3: Atomic Force Microscopy

Jensen¹

2012

The Anatomical Record

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Dielectric relaxation of tert-butyl alcohol–water mixtures using a time-domain technique

Cited by 162 publications

References 10 publications

Dielectric Relaxation Study of Aqueous Amides in Non-Polar Solute Using Picoseconds Time Domain Technique

Dielectric Relaxation Study of Aqueous Amides in Non-Polar Solute Using Picoseconds Time Domain Technique

Dielectric properties of benzylamine in 1,2,6-hexanetriol mixture using time domain reflectometry technique

Types of Imaging, Part 3: Atomic Force Microscopy

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