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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">techusgu</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Юго-Западного государственного университета. Серия: Техника и технологии</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the Southwest State University. Series: Engineering and Technology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2223-1528</issn><publisher><publisher-name>Юго-Западный государственный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21869/2223-1528-2024-14-1-76-87</article-id><article-id custom-type="elpub" pub-id-type="custom">techusgu-223</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>О зависимости скорости дезактивации триплетных возбуждений ряда молекул от их потенциала ионизации и заряда ядра тяжелых атомов растворителя</article-title><trans-title-group xml:lang="en"><trans-title>On the Dependence of the Rate of Deactivation of Triplet Excitations of a Number of Molecules on Their Ionization Potential and the Charge of the Nucleus of Heavy Atoms of the Solvent</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1806-7233</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ерина</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Erina</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ерина Марина Васильевна, кандидат физико-математических наук, доцент, доцент кафедры экспериментальной физики</p><p>ул. Пушкина, д. 1, г. Ставрополь 355017</p></bio><bio xml:lang="en"><p>Marina V. Erina, Candidate of Sciences (Physics and Mathematics), Associate Professor, Associate Professor of the Department of Experimental Physics</p><p>1 Pushkin Str., Stavropol 355017</p></bio><email xlink:type="simple">Shishlina@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-4456-1607</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дерябин</surname><given-names>М. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Deryabin</surname><given-names>M. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дерябин Михаил Иванович, доктор физико-математических наук, профессор, ведущий научный сотрудник кафедры экспериментальной физики</p><p>ул. Пушкина, д. 1, г. Ставрополь 355017</p></bio><bio xml:lang="en"><p>Mikhail I. Deryabin, Doctor of Sciences (Physics and Mathematics), Professor, Leading Researcher of the Department of Experimental Physics</p><p>1 Pushkin Str., Stavropol 355017</p></bio><email xlink:type="simple">m.i.deryabin@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Северо-Кавказский федеральный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>North-Caucasus Federal University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>10</day><month>04</month><year>2024</year></pub-date><volume>14</volume><issue>1</issue><fpage>76</fpage><lpage>87</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ерина М.В., Дерябин М.И., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Ерина М.В., Дерябин М.И.</copyright-holder><copyright-holder xml:lang="en">Erina M.V., Deryabin M.I.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://techusgu.elpub.ru/jour/article/view/223">https://techusgu.elpub.ru/jour/article/view/223</self-uri><abstract><sec><title>Цель</title><p>Цель. Установить характер и причины зависимости изменения излучательной константы скорости дезактивации триплетных возбуждений ряда молекул, обусловленного эффектом внешнего тяжелого атома, от их потенциала ионизации из основного состояния и энергии первого возбужденного синглетного состояния.</p></sec><sec><title>Методы</title><p>Методы. Использованы кинетические методы определения константы скорости дезактивации триплетных возбуждений органических молекул в твердых растворах при 77 К. В качестве растворителя были использованы н-гептан (нейтральный), четыреххлористый углерод и бромистый бензол (содержащие тяжелые атомы хлора и брома). Исследуемыми молекулами были коронен, трифенилен, фенантрен, нафталин и дифенил.</p></sec><sec><title>Результаты</title><p>Результаты. Установлена линейная зависимость между ростом потенциала ионизации, величиной энергии первого возбужденного синглетного состояния и увеличением изменения скорости излучательной дезактивации триплетных возбуждений исследованных молекул в четыреххлористом углероде. Показано, что рост изменения излучательной скорости дезактивации этих молекул с увеличением их потенциала ионизации обусловлен уменьшением разности энергий ионизации и первого возбужденного синглетного состояния.</p></sec><sec><title>Заключение</title><p>Заключение. Результаты исследования показали, что между увеличением излучательной скорости дезактивации триплетных возбуждений исследованных молекул и их потенциалом ионизации существует линейная зависимость. Линейная зависимость наблюдается также между ростом скорости излучательной дезактивации триплетных возбуждений этих молекул и первым возбужденным синглетным состоянием. С ростом потенциалов ионизации исследуемых молекул уменьшается разность между энергией ионизации и энергией первого возбужденного синглетного состояния. Это является причиной увеличения скорости дезактиваций триплетных возбуждений молекул при увеличении их потенциала ионизации.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Purpose</title><p>Purpose. Establish the nature and reasons for the dependence of the change in the radiative rate constant of deactivation of triplet excitations of a number of molecules, caused by the effect of an external heavy atom, on their ionization potential from the ground state and the energy of the first excited singlet state.</p></sec><sec><title>Methods</title><p>Methods. Kinetic methods were used to determine the rate constant for the deactivation of triplet excitations of organic molecules in solid solutions at 77 K. The solvents were n-heptane (neutral), carbon tetrachloride and benzene bromide (containing heavy chlorine and bromine atoms). The molecules studied were coronene, triphenylene, phenanthrene, naphthalene and biphenyl.</p></sec><sec><title>Results</title><p>Results. A linear relationship has been established between an increase in the ionization potential, the energy value of the first excited singlet state, and an increase in the change in the rate of radiative deactivation of triplet excitations of the studied molecules in carbon tetrachloride. It is shown that the increase in the change in the radiative deactivation rate of these molecules with an increase in their ionization potential is due to a decrease in the difference between the ionization energies and the first excited singlet state.</p></sec><sec><title>Conclusion</title><p>Conclusion. The results of the study showed that there is a linear relationship between the increase in the radiative deactivation rate of triplet excitations of the studied molecules and their ionization potential. A linear relationship is also observed between the increase in the rate of radiative deactivation of triplet excitations of these molecules and the first excited singlet state. As the ionization potentials of the molecules under study increase, the difference between the ionization energy and the energy of the first excited singlet state decreases. This is the reason for the increase in the rate of deactivation of triplet excitations of molecules with an increase in their ionization potential.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>твердые растворы</kwd><kwd>органические молекулы</kwd><kwd>фосфоресценция</kwd><kwd>тяжелые атомы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Solid solutions</kwd><kwd>organic molecules</kwd><kwd>phosphorescence</kwd><kwd>heavy atoms</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Kasha M. J. Collisional perturbation of spin-orbital coupling and the mechanism of fluorescence quenching. a visual demonstration of the perturbation // Chem. Phys. 1952. Vol. 20, is. 1. P. 71–74. https://doi.org/10.1063/1.1700199.</mixed-citation><mixed-citation xml:lang="en">Kasha M. J. Collisional perturbation of spin-orbital coupling and the mechanism of fluorescence quenching. 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