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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-1416</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>МОЛЕКУЛЯРНАЯ СПЕКТРОСКОПИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MOLECULAR SPECTROSCOPY</subject></subj-group></article-categories><title-group><article-title>Влияние эффекта внутреннего тяжелого атома на дезактивацию триплетных состояний порфиринов в присутствии молекулярного кислорода</article-title><trans-title-group xml:lang="en"><trans-title>Influence of Internal Heavy Atom Effect on the Deactivation of Triplet States in the Presence of Molecular Oxygen</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>Старухин</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Starukhin</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>Minsk</p></bio><email xlink:type="simple">a.starukhin@ifanbel.bas-net.by</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>Панарин</surname><given-names>А. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Panarin</surname><given-names>A. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физики НАН Беларуси</institution></aff><aff xml:lang="en"><institution>B.I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ГНПО “Оптика, оптоэлектроника и лазерная техника” НАН Беларуси</institution></aff><aff xml:lang="en"><institution>SSPA “Optics, Optoelectronics, and Laser Technology”</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>25</day><month>11</month><year>2023</year></pub-date><volume>90</volume><issue>5</issue><fpage>747</fpage><lpage>753</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Старухин А.С., Панарин А.Ю., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Старухин А.С., Панарин А.Ю.</copyright-holder><copyright-holder xml:lang="en">Starukhin A.S., Panarin A.Y.</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/1416">https://zhps.ejournal.by/jour/article/view/1416</self-uri><abstract><p>Выполнены систематические исследования влияния эффекта внутреннего тяжелого атома на процессы дезактивации триплетных состояний в присутствии молекулярного кислорода для свободных оснований и металлокомплексов порфиринов с ионами Mg(II), Zn(II), Pd(II) и Pt(II) в нескольких растворителях. В экспериментах использованы методики лазерного фотолиза и прямого измерения времени жизни фосфоресценции для комплексов с тяжелыми ионами Pd(II) и Pt(II) при 293 К и атмосферной концентрации кислорода в растворе. Полученные результаты сопоставлены с ранее опубликованными данными по лазерному фотолизу металлокомплексов порфиринов и установлено их частичное несоответствие. Полученные данные обсуждаются совместно с результатами исследований аналогичных соединений в дегазированных растворах. Установлено, что на времена жизни триплетных состояний порфиринов существенное влияние оказывает эффект внутреннего тяжелого атома при атмосферной концентрации кислорода и в обескислороженных растворах. Продемонстрировано, что на параметры триплетных состояний могут оказывать влияние полярность используемых растворителей, а также особенности структуры исследуемых соединений.</p></abstract><trans-abstract xml:lang="en"><p>The influence of internal heavy atom еffect on the deactivation of triplet states in the presence of molecular oxygen for free bases and metal complexes of porphyrins with Mg(II), Zn(II), Pd(II), and Pt(II) ions in several solvents has been systematically studied. The experiments used laser photolysis techniques and direct measurement of the phosphorescence lifetime for metal complexes with heavy Pd(II) and Pt(II) ions at 293 K and atmospheric oxygen concentration in solution. The results obtained are compared with previously published data on laser photolysis of porphyrin metal complexes, and their partial discrepancy is established. The data obtained are discussed together with the results of the study of analogous compounds in degassed solutions. It has been established that the lifetime of the triplet states of metalloporphyrins at atmospheric oxygen concentration and in deoxygenated solutions is significantly affected by the effect of the internal heavy atom. It has been demonstrated that for triplet states, the polarity of the solvents used, as well as structural features of the compounds under study, have a significant effect.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>свободные основания и порфирины с ионами различных металлов</kwd><kwd>времена жизни триплетных состояний</kwd><kwd>лазерный фотолиз</kwd><kwd>времена жизни фосфоресценции в различных растворителях</kwd></kwd-group><kwd-group xml:lang="en"><kwd>free bases and metalloporphyrins with different types of metallic ions</kwd><kwd>lifetimes of triplet states</kwd><kwd>laser photolysis</kwd><kwd>phosphorescence times decay in various solvents</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Белорусского республиканского фонда фундаментальных исследований (грант Ф23МЭ-032), частичной поддержке ГПНИ “Конвергенция-2025” (задание 3.03.10) и ГПНИ “Фотоника и электроника для инноваций” (задание 1.8)</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">D. 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