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 character...
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| Format: | Article |
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Academician Ye.A. Buketov Karaganda University
2024-06-01
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| Series: | Қарағанды университетінің хабаршысы. Физика сериясы |
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| Online Access: | https://phs.buketov.edu.kz/index.php/physics-vestnik/article/view/683 |
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| author | С. Азизов |
| author_facet | С. Азизов |
| author_sort | С. Азизов |
| collection | DOAJ |
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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.
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| format | Article |
| id | doaj-art-f90ce3db456f48cdacc5fc7481d3e59c |
| institution | OA Journals |
| issn | 2518-7198 2663-5089 |
| language | English |
| publishDate | 2024-06-01 |
| publisher | Academician Ye.A. Buketov Karaganda University |
| record_format | Article |
| series | Қарағанды университетінің хабаршысы. Физика сериясы |
| spelling | doaj-art-f90ce3db456f48cdacc5fc7481d3e59c2025-08-20T02:17:34ZengAcademician Ye.A. Buketov Karaganda UniversityҚарағанды университетінің хабаршысы. Физика сериясы2518-71982663-50892024-06-0111429210.31489/2024ph2/36-42Investigation of the temperature dependence of the dielectric relaxation of chlorobenzene, bromobenzene and iodobenzene С. Азизов 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. https://phs.buketov.edu.kz/index.php/physics-vestnik/article/view/683dielectric spectroscopycomplex dielectric constantdielectric propertiesbenzenebromobenzenechlorobenzene |
| spellingShingle | С. Азизов Investigation of the temperature dependence of the dielectric relaxation of chlorobenzene, bromobenzene and iodobenzene Қарағанды университетінің хабаршысы. Физика сериясы dielectric spectroscopy complex dielectric constant dielectric properties benzene bromobenzene chlorobenzene |
| title | Investigation of the temperature dependence of the dielectric relaxation of chlorobenzene, bromobenzene and iodobenzene |
| title_full | Investigation of the temperature dependence of the dielectric relaxation of chlorobenzene, bromobenzene and iodobenzene |
| title_fullStr | Investigation of the temperature dependence of the dielectric relaxation of chlorobenzene, bromobenzene and iodobenzene |
| title_full_unstemmed | Investigation of the temperature dependence of the dielectric relaxation of chlorobenzene, bromobenzene and iodobenzene |
| title_short | Investigation of the temperature dependence of the dielectric relaxation of chlorobenzene, bromobenzene and iodobenzene |
| title_sort | investigation of the temperature dependence of the dielectric relaxation of chlorobenzene bromobenzene and iodobenzene |
| topic | dielectric spectroscopy complex dielectric constant dielectric properties benzene bromobenzene chlorobenzene |
| url | https://phs.buketov.edu.kz/index.php/physics-vestnik/article/view/683 |
| work_keys_str_mv | AT sazizov investigationofthetemperaturedependenceofthedielectricrelaxationofchlorobenzenebromobenzeneandiodobenzene |