N,N-dimethylformamide + 1,2-dimethoxyethane binary mixtures. The static dielectric constant from 40 to 80.degree.C

Complex permittivity spectra of 1-Propanol (1-PrOH), Fluorobenzene (FB) and their binary mixtures are obtained in radio and microwave frequency range using Vector network analyzer (VNA) operating in the frequency range 0.3 MHz to 3.0 GHz and standard microwave benches operated at 9.1 GHz and 19.61 GHz. Static dielectric constant (ε0) and high frequency limiting dielectric constant (ε∞1) for binary mixtures of 1-PrOH and FB are obtained by extrapolating the complex permittivity data towards low frequency side and high frequency side on complex plane plots. Optical dielectric constant (ε∞ = n2) for binary mixtures are measured using Abbe's refractometer. Excess static dielectric constant (ε0)E, Kirkwood correlation parameters (g, geff and gf) and Bruggeman factor (fB) are determined from the values of static dielectric constant (ε0) and optical dielectric constant (ε∞). These parameters have been discussed to explore the molecular interaction between the molecular species.

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Study of Molecular Interaction in Binary Mixtures (1-Propanol + Acetophenone)

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1141.125 ◽

2016 ◽

Vol 1141 ◽

pp. 125-130 ◽

Cited By ~ 1

Author(s):

A.N. Prajapati

Keyword(s):

Dielectric Constant ◽

Refractive Index ◽

Binary Mixtures ◽

Molecular Interaction ◽

Structural Information ◽

Correlation Factor ◽

Static Dielectric Constant ◽

Entire Concentration Range ◽

Binary Liquid ◽

Factor G

Studies on Physico-chemical properties of binary liquid mixtures provide information on the nature of interactions between the constituent of the binaries. Literature provides extensive data on the static dielectric constant (ε0) and refractive index (n) of liquid compounds, but the combined study of all is quite scarce. In the present work static dielectric constant (ε0) and refractive index (n) have been experimentally determined for binary liquid mixture of 1-Propanol (PrOH) with Acetophenone (ACP) over the entire concentration range of mixture composition (0.0 →1.0) at constant temperature 303 K. Static dielectric constant (ε0) and refractive index (n) for the binary mixture have been measured using high precision LCR meter (0.2 MHz) and Abbe’s refractometer respectively. Excess of static dielectric constant (ε0)E and refractive index (n)E are determined and fitted with Redlich-Kister polynomial equation to derive the binary coefficients and standard deviations. For interaction and structural information various parameters namely, Kirkwood correlation factor (g), Kirkwood effective correlation factor (geff), Kirkwood angular correlation factor (gF) and Bruggeman parameter (fB) are determined for the binary mixtures. Variations of these parameters against the concentration of constituents are discussed in terms of molecular interaction between the constituent species.

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Dielectric Properties of Binary Mixtures of 1,2-Dichloroethane+Ethane-1,2-diol and 1,2-Dichloroethane+2-Methoxyethanol

Australian Journal of Chemistry ◽

10.1071/ch9951541 ◽

1995 ◽

Vol 48 (9) ◽

pp. 1541 ◽

Cited By ~ 9

Author(s):

F Corradini ◽

A Marchetti ◽

C Preti ◽

M Tagliazucchi ◽

L Tassi

Keyword(s):

Dielectric Constant ◽

Dielectric Properties ◽

Binary Mixtures ◽

Composition Range ◽

Narrow Range ◽

Static Dielectric Constant ◽

Dielectric Behaviour ◽

Rich Region ◽

Stable Adduct ◽

Fitting Procedures

The dielectric behaviour of binary mixtures of 1,2-dichloroethane (DCE)/ethane-1,2-diol (ED) and DCE/2-methoxyethanol (ME) has been studied at 19 temperatures in the range from -10 to +80°C. The DCE/ED system is immiscible, except in a narrow range near the ED-rich region. The DCE/ME system, which is completely miscible, has been investigated over the whole composition range. Fitting procedures have been applied in order to check the suitability of empirical or semiempirical functions of the type є(T), є(XI) and є(T,XI). Furthermore, the excess static dielectric constant, єE, has been evaluated in order to investigate the possibility of the existence of complex entities. A DCE.2ME species appears to be the only stable adduct.

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Prediction of Static Dielectric Constant (ε0) and Refractive Index (n) Using Various Models for Binary Mixtures (Acetophenone with N-Hexanol)

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1141.131 ◽

2016 ◽

Vol 1141 ◽

pp. 131-135

Author(s):

A.N. Prajapati

Keyword(s):

Dielectric Constant ◽

Refractive Index ◽

Binary Mixtures ◽

Liquid Mixture ◽

Polynomial Equation ◽

Static Dielectric Constant ◽

Mixing Models ◽

Entire Concentration Range ◽

Constituent Species ◽

Lcr Meter

Static dielectric constant (ε0) and refractive index (n) have been experimentally determined for binary liquid mixture of n-Hexanol (HxOH) with Acetophenone (ACP) over the entire concentration range of mixture composition (0.0 →1.0) at constant temperature 303.15 K. Static dielectric constant (ε0) and refractive index (n) for the binary mixture have been measured using high precision LCR meter (0.2 MHz) and Abbe’s refractometer respectively. Excess of static dielectric constant (ε0)E and refractive index (n)E are determined and fitted with Redlich-Kister polynomial equation to derive the binary coefficients and standard deviations. Deviations of these parameters are discussed in terms of terms of molecular interaction between the constituent species. In the present work, comparative study of various mixing models for static dielectric constant (ε0) [Böttcher-Bordewijk (BOTT), Bruggeman (BRUG), Kraszewski (KRAZ), Looyenga (LOOY), Peon–Iglesias (P-I)] and for refractive index (n) [Oster (OST), Weiner (W), Eykman (EYK), Lorentz–Lorentz (L-L), Arago–Biot (A-G), Newton (Nw), Gladstone–Dale (G-D) and Erying–John (EJ)] have been carried out and their validity has been tested for the (n-HxOH+ACP) binary mixtures. The objective of the present work is to report the influence of nonassociative molecule on the molecular dynamics of associative molecules and validation mixing models.

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Comment on “investigation of dielectric constants of water in a nano-confined pore” by H. Zhu, F. Yang, Y. Zhu, A. Li, W. He, J. Huang and G. Li, RSC Adv., 2020, 10, 8628

RSC Advances ◽

10.1039/d0ra02726j ◽

2021 ◽

Vol 11 (9) ◽

pp. 5179-5181

Author(s):

Sayantan Mondal ◽

Biman Bagchi

Keyword(s):

Dielectric Constant ◽

Dielectric Constants ◽

Static Dielectric Constant ◽

Inherent Anisotropy ◽

Nanoconfined Water

Neglects of inherent anisotropy and distinct dielectric boundaries may lead to completely erroneous results. We demonstrate that such mistakes can give rise to gross underestimation of the static dielectric constant of cylindrically nanoconfined water.

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