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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-77</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>ТУШЕНИЕ ФЛУОРЕСЦЕНЦИИ КАРБОКСИФЛУОРЕСЦЕИНОВ В СОСТАВЕ КОВАЛЕНТНЫХ КОНЪЮГАТОВ С ОЛИГОНУКЛЕОТИДАМИ</article-title><trans-title-group xml:lang="en"><trans-title>FLUORESCENCE QUENCHING OF CARBOXYFLUORESCEINS COVALENTLY CONJUGATED WITH OLIGONUCLEOTIDES</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>Поведайло</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Povedailo</surname><given-names>V. A.</given-names></name></name-alternatives><email xlink:type="simple">poved@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>Ступак</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Stupak</surname><given-names>A. P.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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>Цыбульский</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Tsybulsky</surname><given-names>D. A.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шманай</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Shmanai</surname><given-names>V. V.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Яковлев</surname><given-names>Д. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Yakovlev</surname><given-names>D. L.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физики им. Б. И. Степанова НАН Беларуси</institution></aff><aff xml:lang="en"><institution>B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт физико-органической химии НАН Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>10</day><month>03</month><year>2020</year></pub-date><volume>84</volume><issue>3</issue><fpage>434</fpage><lpage>442</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Поведайло В.А., Ступак А.П., Цыбульский Д.А., Шманай В.В., Яковлев Д.Л., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Поведайло В.А., Ступак А.П., Цыбульский Д.А., Шманай В.В., Яковлев Д.Л.</copyright-holder><copyright-holder xml:lang="en">Povedailo V.A., Stupak A.P., Tsybulsky D.A., Shmanai V.V., Yakovlev D.L.</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/77">https://zhps.ejournal.by/jour/article/view/77</self-uri><abstract><p>С использованием уравнений Штерна-Фольмера выполнен анализ процессов динамического и статического тушения флуоресценции молекул 6-(2',7'-диметокси-4',5'-дихлор)карбоксифлуоресцеина (JOE) нуклеозидами дезоксиаденозином, дезоксицитидином, дезоксигуанозином, тимидином и дезоксиуридином в растворе трис-ацетатного буфера. Из пяти нуклеозидов лишь для дезоксигуанозина выявлен преимущественно статический механизм тушения флуоресценции. Показано, что квантовые выходы флуоресценции в растворе буфера для 5- и 6-карбоксифлуоресцеина (FAM), а также 5- и 6-JOE, ковалентно связанных жестким (4-транс-аминоциклогексанол) линкером с олигонуклеотидом, больше, чем в случае их аналогов с гибким (6-аминогексанол) линкером. Полученные данные свидетельствуют о том, что тушение флуоресценции в системах с гибким линкером осуществляется преимущественно вследствие ван-дер-ваальсова взаимодействия между флуорофором и гуанином. Увеличение количества последовательно расположенных гуанинов, связанных линкером с красителем в составе олигонуклеотидов и их дуплексов, приводит к снижению квантового выхода флуоресценции. На основании квантово-химических расчетов с использованием программы Gaussian 09 дана интерпретация смещения спектров поглощения и флуоресценции 5-FAM и 5-JOE в низкочастотную область относительно 6-изомеров. </p></abstract><trans-abstract xml:lang="en"><p>The dynamic and static quenching of 6-(2',7'-dimethoxy-4',5'-dichloro)carboxyfluorescein (JOE) by nucleosides (deoxyadenosine, deoxycytidine, deoxyguanosine, thymidine, and deoxycyridine) in the tris-acetate buffer solution was analyzed using the Stern-Volmer equation. Only one of the five nucleosides - deoxyguanosine - was found to exhibit predominantly static quenching. The quantum yields of the fluorescence of 5- and 6-carboxyfluorescein (FAM), as well as of 5- and 6-JOE, covalently bound by a rigid (4-transaminocyclohexanol) linker to the oligonucleotide, is greater than for their analogues with flexible (6-aminohexanol) linker. It is shown that quenching of fluorescence in systems with a flexible linker takes place mainly with the van der Waals contact of the fluorophore with guanine. An increase in the number of consecutively located guanines at the 5'-end linked to the dye in the composition of oligonucleotides and their duplexes results in a decrease in the quantum yield of fluorescence. Quantum-chemical calculations show a shift of the absorption and fluorescence spectra of 5-FAM and 5-JOE isomers to the low-frequency region compared to 6-isomers </p></trans-abstract><kwd-group xml:lang="ru"><kwd>дезоксирибоолигонуклеотид</kwd><kwd>ДНК-дуплекс</kwd><kwd>спектр поглощения</kwd><kwd>флуоресценция</kwd><kwd>квантовый выход</kwd><kwd>тушение флуоресценции</kwd><kwd>перенос электрона</kwd><kwd>deoxyribooligonucleotide</kwd><kwd>duplex</kwd><kwd>absorption spectra</kwd><kwd>fluorescence</kwd><kwd>quantum yield</kwd><kwd>quenching of fluorescence</kwd><kwd>electron transfe</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">S. Doose, H. Neuweiler, M. Sauer. Chem. Phys. Chem., 10 (2009) 1389-1398</mixed-citation><mixed-citation xml:lang="en">S. Doose, H. Neuweiler, M. Sauer. Chem. Phys. 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