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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">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-1963</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>ЛЮМИНЕСЦЕНЦИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>LUMINESCENCE</subject></subj-group></article-categories><title-group><article-title>Влияние изменений структуры раствора на фосфоресценцию аценафтена в переохлажденном толуоле при отогреве</article-title><trans-title-group xml:lang="en"><trans-title>Effect of Changes in Solution Structure on the Phosphorescence of Acenaphthene in Supercooled Toluene During Heating</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><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>Ставрополь</p></bio><bio xml:lang="en"><p>Stavropol</p></bio><email xlink:type="simple">shishlina@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><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>Yerina</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ставрополь</p></bio><bio xml:lang="en"><p>Stavropol</p></bio><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></aff><aff xml:lang="en"><institution>North Caucasus Federal University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>26</day><month>09</month><year>2025</year></pub-date><volume>92</volume><issue>5</issue><fpage>571</fpage><lpage>575</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Дерябин М.И., Ерина М.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Дерябин М.И., Ерина М.В.</copyright-holder><copyright-holder xml:lang="en">Deryabin M.I., Yerina M.V.</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://zhps.ejournal.by/jour/article/view/1963">https://zhps.ejournal.by/jour/article/view/1963</self-uri><abstract><p>Исследованы изменения интенсивности фосфоресценции аценафтена в переохлажденном толуоле в процессе отогрева раствора со скоростью 0.04 К/с при концентрациях 2 · 10–3 и 2 · 10–2 моль/л. Показано, что при достижении температуры стеклования толуола Тg = 117 К начинается эффективное тушение фосфоресценции кислородом для обеих концентраций раствора. При температуре Т = 130 К повышается интенсивность, обусловленная появлением кристаллической фазы. Значения этих температур одинаковы для обеих концентраций. Для концентрации раствора 2 · 10–3 моль/л при Т = 140 К наблюдается “взрывной” рост интенсивности, обусловленный самоускорением кристаллизации толуола. Для концентрации раствора 2 · 10–2 моль/л таких изменений не обнаружено. Обсуждаются возможные причины установленных изменений интенсивности фосфоресценции и их использование в исследованиях структурных изменений в переохлажденных органических растворителях.</p></abstract><trans-abstract xml:lang="en"><p>Changes in the phosphorescence intensity of acenaphthene in supercooled toluene during solution heating at a rate of 0.04 K/s at concentrations of 2 · 10–3 and 2 · 10–2 mol/L are studied. It is shown that when the glass transition temperature of toluene Tg = 117 K is reached, effective quenching of phosphorescence by oxygen begins for both solution concentrations. At the temperature of T = 130 K, an increase in intensity begins due to the appearance of a crystalline phase. The values of these temperatures are the same for both concentrations. For the solution concentration of 2 · 10–3 mol/L at T = 140 K, an “explosive” increase in intensity is observed due to self-acceleration of toluene crystallization. For the solution concentration of 2 · 10–2 mol/L, such changes are not observed. Possible causes of the established changes in the phosphorescence intensity and using this effect for studies of structural changes in supercooled organic solvents are discussed.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>фосфоресценция</kwd><kwd>интенсивность</kwd><kwd>аценафтен</kwd><kwd>структура раствора</kwd><kwd>толуол</kwd></kwd-group><kwd-group xml:lang="en"><kwd>phosphorescence</kwd><kwd>intensity</kwd><kwd>acenaphthene</kwd><kwd>solution structure</kwd><kwd>toluene</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">O. Yamamuro, I. Tsukushi, A. Lindqvist, S. Takahara, M. Ishikawa, T. Matsuo. J. Phys. Chem. B, 102 (1998) 1605—1609</mixed-citation><mixed-citation xml:lang="en">O. Yamamuro, I. Tsukushi, A. Lindqvist, S. Takahara, M. Ishikawa, T. Matsuo. J. Phys. Chem. 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