Samir Azizov - Academia.edu (original) (raw)
Papers by Samir Azizov
Ķaraġandy universitetìnìn̦ habaršysy. Fizika seriâsy/Ķaraġandy universitetìnìņ habaršysy. Fizika seriâsy, Jun 24, 2024
Investigation of the temperature dependence of the dielectric relaxation of chlorobenzene, bromob... more Investigation of the temperature dependence of the dielectric relaxation of chlorobenzene, bromobenzene and iodobenzene This paper deals with the investigation results of temperature dependence of complex permittivity'sε * = έ− iε˝ of chloro, bromo and iodo-benzene at wavelength 11,50 cm and 12,80 cm within the temperature range 20 ÷-80˚. It is established that dielectric properties of given liquids are characteristic of one relaxation time. The dielectric spectra were studied taking into account other frequencies given in the literature. In all investigated liquids, a jump appears in the real and imaginary parts of the complex permittivity at the point of the phase transition. The temperature dependence of the dielectric relaxation time of molecules in the liquid state has been determined. It was found that with an increase in the amount of the halogen substituent, an increase in the relaxation time occurs. Macroscopic and molecular relaxation times were calculated from the experimental values. The thermodynamic quantities characterizing the process of dielectric relaxation are calculated. The activation enthalpy of dielectric relaxation processes is compared. The studies were carried out using the dielectric spectroscopy method. This method allows a more detailed study of the dielectric properties of the objects of study due to the large equilibrium ("static") dielectric constant of the object. It has been determined that the height of the potential barrier separating the two equilibrium positions of a polar molecule is greatest in the state of a pure polar liquid and decreases with dilution in a non-polar solvent.
East European journal of physics, Mar 5, 2024
The article presents the results of a study of the temperature dependence of the dielectric const... more The article presents the results of a study of the temperature dependence of the dielectric constant ε' and the dielectric loss index ε" of the chlorobenzene-iodobenzene system at wavelengths λ = 6.32; 4.01; 3.21; 2.14; 1.18 and 0.75 V temperature range-40℃÷+30℃. The static dielectric constant was determined at a frequency of 7 MHz. The temperature dependence of the time of dielectric relaxation of molecules in the liquid state was determined. It was established that in the specified temperature-frequency range the dispersion region consists of two parts. Analysis of the temperature dependence of dielectric polarization relaxation in the system chlorobenzene-iodobenzene shows that the relaxation times of the components do not depend on their short-range order. It was also discovered that the rate graph showing the dependence of the logarithm of the relaxation time on the reciprocal of the temperature logτ ~ 1/T, consists of two parts and the value of the static dielectric permeability ε∞ is non-additive. To explain these results, it is assumed that clusters are formed in this system, the same as in the pure components.
Modern Physics Letters B, Dec 29, 2023
В работе представлена методика модификации короткозамкнутой линии для исследования температурной ... more В работе представлена методика модификации короткозамкнутой линии для исследования температурной зависимости комплексной диэлектрической проницаемости ε* в диапазоне микроволн. Ключевые слова: диэлектрическая спектроскопия, диэлектрическая релаксация, диэлектрические свойства хлорбензола.
В статье приведены результаты исследований диэлектрической релаксации бромбензола в диапазоне мик... more В статье приведены результаты исследований диэлектрической релаксации бромбензола в диапазоне микроволн. Исследования проводились методом короткозамкнутой линии для определения температурной зависимости комплексной диэлектрической проницаемости ε*.
The investigation data relating to creation of control devices of chemical engineering processes ... more The investigation data relating to creation of control devices of chemical engineering processes such as control systems of diluted solutions of polar substances in nonpolar solvent, are given.
The investigation data of equilibrium and dynamic characteristics of dielectric polarizations, th... more The investigation data of equilibrium and dynamic characteristics of dielectric polarizations, the measurement results of dielectric constant ε' and absorption index ε" of chlorobenzene-n-butyl alcohol system, are given in the article. The measurements are carried out on the frequencies 0,008; 0,04; 0
The measurement results of dielectric constant ε' and absorption coefficient ε"obtained for conce... more The measurement results of dielectric constant ε' and absorption coefficient ε"obtained for concentrated solutions chlorbenzene-benzene, chlorbenzene-n-hexane at wave lengths λ = 12,80 and λ = 3,26 cm at temperature 20°С are given in the article. The static dielectric constant is obtained at frequency 1MHz.The obtained experimental values ε',ε" and ε0 of investigated systems in (ε',ε'') plane locate on the semicircle the center of which is on ε' axis. In this case the high-frequency limit value of ε∞ dielectric coefficient exceeds the corresponding n 2 refraction index square. The macroscopic and molecular relaxation times are calculated on the base of experimental data.
The complex dielectric constants of benzene-bromobenzene system at frequency 3 MHz in temperature... more The complex dielectric constants of benzene-bromobenzene system at frequency 3 MHz in temperature region from 20°С up to 100°С, which overlap the liquid phase, solid phase and phase between lines of liquidus and solidus, are measured by resonance method. The thermodynamic values characterizing the dielectric relaxation process are calculated.
The analysis of glycine water solution measured by dielectric constant at temperature from 20 до ... more The analysis of glycine water solution measured by dielectric constant at temperature from 20 до 50 ° С on 5 frequences in centimetric range is carried out. The dielectric spectra are studied taking under consideration other frequences given in scientific literature.
The complex dielectric constants of chlorbenzene, bromobenzene and iodobenzene at wave lengths 11... more The complex dielectric constants of chlorbenzene, bromobenzene and iodobenzene at wave lengths 11,5cm and 12,8cm at temperatures from 20 up to-80 ° С are measured. The jump appears in real and imaginary parts of complex dielectric constant in the point of phase transition in all investigated liquids. The temperature dependence of time of molecule dielectric relaxation in liquid state is found. It is revealed that increase of relaxation time takes place with increase of size halogen substituent. The thermodynamic values characterizing the dielectric relaxation process are calculated. The comparison of enthalpy of activation of dielectric relaxation processes is carried out.
The dielectric coefficients of one-molar water solution of water and glycine at temperature from ... more The dielectric coefficients of one-molar water solution of water and glycine at temperature from 20°С up to50°С in five frequencies in centimetric range are measured. The dielectric spectra taking under consideration other frequencies given in reference are studied. It is shown that Kirkwood model in which the continuous structures of water-soluble amino-acids are accepted in the capacity of medium consisting of water and bipolar molecules (zwitter-ion) of monomer acid should be revised again.
Some peculiarities of the dielectric behaviour of the interaction of translation and rotation com... more Some peculiarities of the dielectric behaviour of the interaction of translation and rotation components of heat motion for acetone molecules were studied in the present research. As a criterion for relative importance of these components, comparison of the activation energy of translation was chosen: electro conductivity, viscosity and dielectric relaxation. Observed results are discussed in the frame of translation-rotation dynamics of the molecular clusters of acetone.
Ķaraġandy universitetìnìn̦ habaršysy. Fizika seriâsy/Ķaraġandy universitetìnìņ habaršysy. Fizika seriâsy, Jun 24, 2024
Investigation of the temperature dependence of the dielectric relaxation of chlorobenzene, bromob... more Investigation of the temperature dependence of the dielectric relaxation of chlorobenzene, bromobenzene and iodobenzene This paper deals with the investigation results of temperature dependence of complex permittivity'sε * = έ− iε˝ of chloro, bromo and iodo-benzene at wavelength 11,50 cm and 12,80 cm within the temperature range 20 ÷-80˚. It is established that dielectric properties of given liquids are characteristic of one relaxation time. The dielectric spectra were studied taking into account other frequencies given in the literature. In all investigated liquids, a jump appears in the real and imaginary parts of the complex permittivity at the point of the phase transition. The temperature dependence of the dielectric relaxation time of molecules in the liquid state has been determined. It was found that with an increase in the amount of the halogen substituent, an increase in the relaxation time occurs. Macroscopic and molecular relaxation times were calculated from the experimental values. The thermodynamic quantities characterizing the process of dielectric relaxation are calculated. The activation enthalpy of dielectric relaxation processes is compared. The studies were carried out using the dielectric spectroscopy method. This method allows a more detailed study of the dielectric properties of the objects of study due to the large equilibrium ("static") dielectric constant of the object. It has been determined that the height of the potential barrier separating the two equilibrium positions of a polar molecule is greatest in the state of a pure polar liquid and decreases with dilution in a non-polar solvent.
East European journal of physics, Mar 5, 2024
The article presents the results of a study of the temperature dependence of the dielectric const... more The article presents the results of a study of the temperature dependence of the dielectric constant ε' and the dielectric loss index ε" of the chlorobenzene-iodobenzene system at wavelengths λ = 6.32; 4.01; 3.21; 2.14; 1.18 and 0.75 V temperature range-40℃÷+30℃. The static dielectric constant was determined at a frequency of 7 MHz. The temperature dependence of the time of dielectric relaxation of molecules in the liquid state was determined. It was established that in the specified temperature-frequency range the dispersion region consists of two parts. Analysis of the temperature dependence of dielectric polarization relaxation in the system chlorobenzene-iodobenzene shows that the relaxation times of the components do not depend on their short-range order. It was also discovered that the rate graph showing the dependence of the logarithm of the relaxation time on the reciprocal of the temperature logτ ~ 1/T, consists of two parts and the value of the static dielectric permeability ε∞ is non-additive. To explain these results, it is assumed that clusters are formed in this system, the same as in the pure components.
Modern Physics Letters B, Dec 29, 2023
В работе представлена методика модификации короткозамкнутой линии для исследования температурной ... more В работе представлена методика модификации короткозамкнутой линии для исследования температурной зависимости комплексной диэлектрической проницаемости ε* в диапазоне микроволн. Ключевые слова: диэлектрическая спектроскопия, диэлектрическая релаксация, диэлектрические свойства хлорбензола.
В статье приведены результаты исследований диэлектрической релаксации бромбензола в диапазоне мик... more В статье приведены результаты исследований диэлектрической релаксации бромбензола в диапазоне микроволн. Исследования проводились методом короткозамкнутой линии для определения температурной зависимости комплексной диэлектрической проницаемости ε*.
The investigation data relating to creation of control devices of chemical engineering processes ... more The investigation data relating to creation of control devices of chemical engineering processes such as control systems of diluted solutions of polar substances in nonpolar solvent, are given.
The investigation data of equilibrium and dynamic characteristics of dielectric polarizations, th... more The investigation data of equilibrium and dynamic characteristics of dielectric polarizations, the measurement results of dielectric constant ε' and absorption index ε" of chlorobenzene-n-butyl alcohol system, are given in the article. The measurements are carried out on the frequencies 0,008; 0,04; 0
The measurement results of dielectric constant ε' and absorption coefficient ε"obtained for conce... more The measurement results of dielectric constant ε' and absorption coefficient ε"obtained for concentrated solutions chlorbenzene-benzene, chlorbenzene-n-hexane at wave lengths λ = 12,80 and λ = 3,26 cm at temperature 20°С are given in the article. The static dielectric constant is obtained at frequency 1MHz.The obtained experimental values ε',ε" and ε0 of investigated systems in (ε',ε'') plane locate on the semicircle the center of which is on ε' axis. In this case the high-frequency limit value of ε∞ dielectric coefficient exceeds the corresponding n 2 refraction index square. The macroscopic and molecular relaxation times are calculated on the base of experimental data.
The complex dielectric constants of benzene-bromobenzene system at frequency 3 MHz in temperature... more The complex dielectric constants of benzene-bromobenzene system at frequency 3 MHz in temperature region from 20°С up to 100°С, which overlap the liquid phase, solid phase and phase between lines of liquidus and solidus, are measured by resonance method. The thermodynamic values characterizing the dielectric relaxation process are calculated.
The analysis of glycine water solution measured by dielectric constant at temperature from 20 до ... more The analysis of glycine water solution measured by dielectric constant at temperature from 20 до 50 ° С on 5 frequences in centimetric range is carried out. The dielectric spectra are studied taking under consideration other frequences given in scientific literature.
The complex dielectric constants of chlorbenzene, bromobenzene and iodobenzene at wave lengths 11... more The complex dielectric constants of chlorbenzene, bromobenzene and iodobenzene at wave lengths 11,5cm and 12,8cm at temperatures from 20 up to-80 ° С are measured. The jump appears in real and imaginary parts of complex dielectric constant in the point of phase transition in all investigated liquids. The temperature dependence of time of molecule dielectric relaxation in liquid state is found. It is revealed that increase of relaxation time takes place with increase of size halogen substituent. The thermodynamic values characterizing the dielectric relaxation process are calculated. The comparison of enthalpy of activation of dielectric relaxation processes is carried out.
The dielectric coefficients of one-molar water solution of water and glycine at temperature from ... more The dielectric coefficients of one-molar water solution of water and glycine at temperature from 20°С up to50°С in five frequencies in centimetric range are measured. The dielectric spectra taking under consideration other frequencies given in reference are studied. It is shown that Kirkwood model in which the continuous structures of water-soluble amino-acids are accepted in the capacity of medium consisting of water and bipolar molecules (zwitter-ion) of monomer acid should be revised again.
Some peculiarities of the dielectric behaviour of the interaction of translation and rotation com... more Some peculiarities of the dielectric behaviour of the interaction of translation and rotation components of heat motion for acetone molecules were studied in the present research. As a criterion for relative importance of these components, comparison of the activation energy of translation was chosen: electro conductivity, viscosity and dielectric relaxation. Observed results are discussed in the frame of translation-rotation dynamics of the molecular clusters of acetone.