Temperature Dependence of Kerr Coefficient of Binary Liquid Mixtures of Aprotic-Aprotic Molecules
TL;DR: In this paper, the electro optical Kerr coefficients of binary liquid mixtures, comprising of aprotic-aprotic molecules only, are measured over the temperature range of 286 K to 315 K.
Abstract: The electro optical Kerr coefficients of binary liquid mixtures, comprising of aprotic-aprotic molecules only, are measured over the temperature range of 286 K to 315 K. To with in experimental errors, the logarithm of Kerr coefficient can be expressed as Van't Hoff type expression to the reciprocal of temperature. Information on the interaction energy between the constituents of the binary mixtures is thereby obtained. It is found that the interaction energy in aromatic ketone-aliphatic nitrile binary mixtures is comparatively higher than in the binary mixtures with aliphatic ketone-aliphatic nitriles, aromatic ketone-aromatic nitrile and aromatic ketone-aliphatic ketones components. This is attributed to the dipole-dipole interaction existing between the components of the binary mixtures.
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TL;DR: In this paper, complex dielectric spectra of the binary mixture of benzonitrile (BNZ) with acetophenone (ACPH) have been carried out at 11 different concentrations in the frequency range of 10 MHz to 40 GHz at four different temperatures (10°C, 15°C and 20°C) using Time Domain Reflectometry technique.
Abstract: ABSTRACT Complex dielectric spectra of the binary mixture of benzonitrile (BNZ) with acetophenone (ACPH) have been carried out at 11 different concentrations in the frequency range of 10 MHz to 40 GHz at four different temperatures (10°C, 15°C, 20°C and 25°C) using Time Domain Reflectometry technique. Static dielectric constant (ε0), relaxation time (τ) are obtained for above mentioned temperatures using nonlinear least squares fit method and density and refractive index are obtained at room temperature (25°C). These parameters are used to calculate the excess static dielectric constant (ε0 E) and excess inverse relaxation time (1/τ)E, excess molar volume (Vm E), effective Kirkwood correlation factor (geff), Bruggeman factor (fB) and thermodynamic parameters such as enthalpy and entropy of activation of BNZ-ACPH mixture. Static dielectric constant decreases with increasing temperature and increasing concentration of ACPH in BNZ. The deviance in the excess parameters shows the strength of the molecular interactions and the presence of intermolecular interaction between unlike molecules. The measurement of Kerr constant (B) of the binary mixture of BNZ-ACPH have been reported for the wavelengths 632.8 nm and 512 nm for 5 different concentrations at room temperature using Electro-Optic Kerr Effect method. The change in the Kerr constant was observed for the different concentrations associated with the pure liquids. This deviation shows the non-additive behaviour and which is in good agreement with the dielectric parameters of the system under study. Also, the FTIR spectra have been obtained of BNZ-ACPH mixture to have a good agreement with the dielectric study.
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TL;DR: In this article, a method for determining molar Kerr constants (mK) by extrapolation of the values measured in a series of selected solvents was proposed, and the mK values of 19 organic compounds were calculated.
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TL;DR: A new relation between electricity and light: dielectrified media birefringent was proposed in this article, where the authors proposed a dielectric media bifurcation.
Abstract: (1875). XL. A new relation between electricity and light: Dielectrified media birefringent. The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science: Vol. 50, No. 332, pp. 337-348.
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TL;DR: In this article, the relationship between field-free orientational time correlation functions and dielectric and Kerr-effect responses to step-on and step-off electric fields is considered.
Abstract: Relations between field-free orientational time-correlation functions and dielectric and Kerr-effect responses to step-on and step-off electric fields are considered Whereas the dielectric and Kerr-effect decay transients are simply related to 〈P1(u, t)〉 and 〈P2(u, t)〉, where u= cos θ, the rise transients are not, in general, related to these quantities; assumptions and specific reorientation mechanisms are required in order to understand the rise transients The dielectric and Kerr-effect relaxations are considered for the models of rotational diffusion and “fluctuation relaxation” Experimental data for poly-n-butylisocyanate in solution and tritolyl phosphate are discussed in terms of the theory and mechanisms for motion
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