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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-899</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Столкновительная деполяризация люминесценции многоатомных молекул с внутренними вращениями</article-title><trans-title-group xml:lang="en"><trans-title>Collisional Depolarization of Luminescence of Polyatomic Molecules with Internal Rotations</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>Блохин</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Blokhin</surname><given-names>A. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><email xlink:type="simple">lsfm@imaph.bas-net.by</email><xref ref-type="aff" rid="aff-1"/></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><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>09</day><month>10</month><year>2021</year></pub-date><volume>88</volume><issue>5</issue><fpage>701</fpage><lpage>710</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Блохин А.П., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Блохин А.П.</copyright-holder><copyright-holder xml:lang="en">Blokhin A.P.</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/899">https://zhps.ejournal.by/jour/article/view/899</self-uri><abstract><p>Развита обобщенная диффузионная модель вращательной деполяризации люминесценции многоатомных молекул с внутренними ротаторами в предположении независимых статистик столкновений для внутренних поворотов и вращения молекул в целом. Модель использована для расчета столкновительной деполяризации нежестких олигонуклеотидов c флуоресцентными метками, находящимися в свободном состоянии в растворах и в комплексе с наночастицами. Выполнен анализ изменений в процессе релаксации анизотропии флуоресценции в зависимости от соотношения моментов инерции подвижных частей молекулы и ориентации моментов переходов. Проведена оценка условий возможного усиления анизотропии и контроля изменений структуры биомолекул при их иммобилизации на поверхности наночастиц.</p></abstract><trans-abstract xml:lang="en"><p>A generalized diffusion model of rotational depolarization of luminescence of polyatomic molecules with internal rotators is developed under the assumption of independent collision statistics for internal rotations and rotation of the molecules as a whole. The model is used to calculate the collisional depolarization of non-rigid oligonucleotides with fluorescent labels that are in the free state in solutions and in complex with nanoparticles. The changes in the fluorescence anisotropy during relaxation are analyzed depending on the ratio of the inertia moments of the moving parts of the molecule and the transition moments orientation. The conditions for possible enhancement of anisotropy and control of changes in the structure of biomolecules during their immobilization on the surface of nanoparticles are evaluated.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>деполяризация люминесценции</kwd><kwd>ориентационная релаксация</kwd><kwd>молекулярные столкновения</kwd><kwd>динамика внутримолекулярного вращения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>luminescence depolarization</kwd><kwd>orientational relaxation</kwd><kwd>molecular collisions</kwd><kwd>dynamic of intramolecular rotation</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">J. R. Lakowicz. Principles of Fluorescence Spectroscopy, Springer (2006)</mixed-citation><mixed-citation xml:lang="en">J. R. Lakowicz. 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