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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-1750</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>Cпектры оптического поглощения (E)-2-(2-арил1-циановинил)-4-циклопропилтиазолов</article-title><trans-title-group xml:lang="en"><trans-title>OPTICAL ABSORPTION SPECTRA OF (E)-2-(2-ARYL-1-CYANOVINYL)-4-CYCLOPROPYLTHIAZOLES</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>Тихий</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Tikhii</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Луганск</p></bio><bio xml:lang="en"><p>Lugansk</p></bio><email xlink:type="simple">ea0000ffff@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>Жихарев</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhikharev</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Донецк</p></bio><bio xml:lang="en"><p>Donetsk</p></bio><email xlink:type="simple">ea0000ffff@mail.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>Дяченко</surname><given-names>В. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Dyachenko</surname><given-names>V. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Луганск</p></bio><bio xml:lang="en"><p>Lugansk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Луганский государственный педагогический университет</institution></aff><aff xml:lang="en"><institution>Lugansk State Pedagogical University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Донецкий физико-технический институт им. А. А. Галкина</institution></aff><aff xml:lang="en"><institution>Galkin Donetsk Institute for Physics and Engineering</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>07</day><month>02</month><year>2025</year></pub-date><volume>92</volume><issue>1</issue><fpage>22</fpage><lpage>31</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Тихий А.А., Жихарев И.В., Дяченко В.Д., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Тихий А.А., Жихарев И.В., Дяченко В.Д.</copyright-holder><copyright-holder xml:lang="en">Tikhii A.A., Zhikharev I.V., Dyachenko V.D.</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/1750">https://zhps.ejournal.by/jour/article/view/1750</self-uri><abstract><p>Исследованы спектры оптического поглощения ряда производных (E)-2-(2-арил-1-циановинил)-4- циклопропилтиазола, различающихся заместителями в пара-положении арильного цикла. Измерения проведены в растворах в диметилформамиде. Показано, что введение акцепторных заместителей приводит к батохромному сдвигу поглощения. Это объясняется тем, что они способствуют делокализации электронов неподеленных пар азота и серы тиазолового цикла. Полосы поглощения в диапазоне 250—450 нм возникают вследствие переходов ВЗМО→НВМО и ВЗМО-1→НВМО.</p></abstract><trans-abstract xml:lang="en"><p>The optical absorption spectra of (E)-2-(2-aryl-1-cyanovinyl)-4-cyclopropylthiazole derivatives, with different substituents in the para-position of the aryl ring, have been studied. The measurements were carried out in dimethylformamide solutions. It is shown that the acceptor substituents introduction leads to a bathochromic shift of absorption. This is explained by the fact that they promote the delocalization of electrons of unoccupied pairs of nitrogen and sulfur of the thiazole ring. Absorption bands in the range of 250—450 nm arise from HOMO→LUMO and HOMO-1→LUMO transitions. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>электронный переход</kwd><kwd>оптическое поглощение</kwd><kwd>теория функционала плотности</kwd><kwd>производные тиазола</kwd></kwd-group><kwd-group xml:lang="en"><kwd>electronic transitions</kwd><kwd>optical absorption</kwd><kwd>density functional theory</kwd><kwd>thiazole derivatives</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. A. Ibrahim, H. F. Rizk, D. S. Aboul-Magd, A. Ragab. Dyes and Pigments, 193 (2021) 109504</mixed-citation><mixed-citation xml:lang="en">S. A. Ibrahim, H. F. Rizk, D. S. Aboul-Magd, A. Ragab. Dyes and Pigments, 193 (2021) 109504</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">M. E. Yehya, H. H. Maher, W. E. Ayman. 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