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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-704</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>ДИПОДАЛЬНЫЙ МОЛЕКУЛЯРНЫЙ ФЛУОРЕСЦЕНТНЫЙ СЕНСОР ДЛЯ ОБНАРУЖЕНИЯ Nа(I)</article-title><trans-title-group xml:lang="en"><trans-title>DIPODAL MOLECULAR DEVICE AS FLUORESCENT SENSOR FOR Na(I) DETECTION</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>Dangi</surname><given-names>V.</given-names></name><name name-style="western" xml:lang="en"><surname>Dangi</surname><given-names>Vijay</given-names></name></name-alternatives><bio xml:lang="ru"><p>Курукшетра, Харьяна-136119</p></bio><bio xml:lang="en"><p>Kurukshetra, Haryana-136119</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Baral</surname><given-names>M.</given-names></name><name name-style="western" xml:lang="en"><surname>Baral</surname><given-names>Minati</given-names></name></name-alternatives><bio xml:lang="ru"><p>Курукшетра, Харьяна-136119</p></bio><bio xml:lang="en"><p>Kurukshetra, Haryana-136119</p></bio><email xlink:type="simple">minatibnitkkr@gmail.com</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>Kanungo</surname><given-names>B. K.</given-names></name><name name-style="western" xml:lang="en"><surname>Kanungo</surname><given-names>B. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лонговал-148106</p></bio><bio xml:lang="en"><p>Longowal-148106</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный технологический институт</institution></aff><aff xml:lang="en"><institution>National Institute of Technology, Department of Chemistry</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Инженерно-технологический институт Сант Лонговал</institution></aff><aff xml:lang="en"><institution>Sant Longowal Institute of Engineering and Technology, Department of Chemistry</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>02</day><month>11</month><year>2020</year></pub-date><volume>87</volume><issue>5</issue><fpage>821</fpage><lpage>831</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Dangi V., Baral M., Kanungo B.K., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Dangi V., Baral M., Kanungo B.K.</copyright-holder><copyright-holder xml:lang="en">Dangi V., Baral M., Kanungo B.K.</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/704">https://zhps.ejournal.by/jour/article/view/704</self-uri><abstract><p>Разработан диподальный флуоресцентный датчик N1 ,N3 -бис(2-(2,3,4-тригидроксибензилиден) амино) этилмалонамид (MEP), подходящий для практического измерения концентрации натрия, и охарактеризован несколькими спектроскопическими методами. Конструкция диподального каркаса включает в себя центральную единицу, спейсер и флуорофорную составляющую в качестве структурных ключевых особенностей. Датчик флуоресценции MEP использует механизм фотоиндуцированного переноса электронов и показывает превосходную селективность по Na(I) среди других ионов биологически и экологически важных металлов, а именно Na(I), K(I), Al(III), Cr(III), Fe(III), Fe(II), Co(II), Ni(II), Cu(II) и Zn(II) в ДМСО, демонстрируя заметное увеличение интенсивности флуоресценции с 345.5 до 705.5 отн. ед. при λmax = 532.9 нм. Стехиометрия связывания 1:2 между лигандом и ионом Na(I) подтверждена зависимостями Штерна-Фольмера и Хилла. Константа ассоциации для лиганда с ионом металлического натрия очень высокая — 7.7×106 М–2 , что может быть связано с захватом ионов натрия в псевдополости лиганда, созданными взаимодействием лиганда и ионов натрия. Исследованы потенциальные применения лиганда для обнаружения ионов Na(I) в экологических и промышленных приложениях.</p></abstract><trans-abstract xml:lang="en"><p>A novel dipodal fluorescent sensor, N1 ,N3 -bis(2-(2,3,4-trihydroxybenzylidene)amino)ethylmalonamide (MEP), suitable for the practical measurement of sodium concentration has been successfully developed and characterized by several spectroscopic techniques. The design of the dipodal scaffold includes a central unit, spacer, and fluorophore moiety as structural key features. The fluorescence sensor MEP adopts a photoinduced electron transfer mechanism and shows excellent selectivity for Na(I) among other biologically and environmentally important metal ions, viz., Na(I), K(I), Al(III), Cr(III), Fe(III), Fe(II), Co(II), Ni(II), Cu(II), and Zn(II) in DMSO by demonstrating a remarkable enhancement in the fluorescence intensity from 345.5 to 705.5 a.u. at λmax = 532.9 nm. The 1:2 binding stoichiometry between the ligand and Na(I) ion was confirmed by Stern–Volmer and Hill Plot. The association constant determined for the ligand with the sodium metal ion is found to be very high, 7.7×106 M–2 , which may be attributed to the trapping of sodium ions into the pseudo cavities of the ligand created by interaction of the ligand and sodium ions. The studies explore potential applications of the ligand for Na(I) ions detection in environmental and industrial applications.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>диподальный хелатор</kwd><kwd>пирогаллол</kwd><kwd>флуоресценция</kwd><kwd>фотоиндуцированный перенос электронов</kwd><kwd>сенсор</kwd></kwd-group><kwd-group xml:lang="en"><kwd>dipodal chelator</kwd><kwd>pyrogallol</kwd><kwd>fluorescence</kwd><kwd>photoinduced electron transfer</kwd><kwd>sensor</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">A. P. de Silva, H. Q. Gunaratne, T. Gunnlaugsson, A. J. Huxley, C. P. McCoy, J. T. Rademacher, T. E. Rice, Chem. Rev., 97, 1515–1566 (1997).</mixed-citation><mixed-citation xml:lang="en">A. P. de Silva, H. Q. Gunaratne, T. Gunnlaugsson, A. J. Huxley, C. P. McCoy, J. T. Rademacher, T. E. Rice, Chem. 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