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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-1011</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>Исследование молекулярных взаимодействий в кристаллическом моногидрате оротовой кислоты методами терагерцовой спектроскопии и теории функционала плотности</article-title><trans-title-group xml:lang="en"><trans-title>Terahertz Spectroscopy and Density Functional Theory Analysis of the Molecular Interactions in Crystalline Orotic Acid Monohydrate</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>Zheng</surname><given-names>Zh.</given-names></name><name name-style="western" xml:lang="en"><surname>Zheng</surname><given-names>Zh.</given-names></name></name-alternatives><bio xml:lang="ru"><p> Сиань </p></bio><bio xml:lang="en"><p> Xi’an </p></bio><email xlink:type="simple">zhengzhuanp@xupt.edu.cn</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>Zeng</surname><given-names>F.</given-names></name><name name-style="western" xml:lang="en"><surname>Zeng</surname><given-names>F.</given-names></name></name-alternatives><bio xml:lang="ru"><p> Сиань </p></bio><bio xml:lang="en"><p> Xi’an </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>Zhi</surname><given-names>Y.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhi</surname><given-names>Y.</given-names></name></name-alternatives><bio xml:lang="ru"><p> Сиань </p></bio><bio xml:lang="en"><p> Xi’an </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>Zhu</surname><given-names>L.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhu</surname><given-names>L.</given-names></name></name-alternatives><bio xml:lang="ru"><p> Сиань </p></bio><bio xml:lang="en"><p> Xi’an </p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Школа электронной инженерии Сианьского университета почты и телекоммуникаций</institution></aff><aff xml:lang="en"><institution>School of Electronic Engineering at Xi’an University of Posts &amp; Telecommunication</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>24</day><month>03</month><year>2022</year></pub-date><volume>89</volume><issue>2</issue><fpage>269</fpage><lpage>274</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Zheng Z., Zeng F., Zhi Y., Zhu L., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Zheng Z., Zeng F., Zhi Y., Zhu L.</copyright-holder><copyright-holder xml:lang="en">Zheng Z., Zeng F., Zhi Y., Zhu 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/1011">https://zhps.ejournal.by/jour/article/view/1011</self-uri><abstract><p>Терагерцовый спектр поглощения моногидрата оротовой кислоты в кристаллической фазе получен экспериментально и смоделирован с помощью теории функционала плотности. Четыре отчетливых максимума в диапазоне 12—128 см–1 воспроизведены моделированием с использованием функции Пердью–Берка–Эрнцерхофа. Сравнение экспериментальных и расчетных данных показало, что измеренные максимумы появляются в основном из-за межмолекулярных сил, в которых доминируют взаимодействия молекул оротовой кислоты. Особенность при 110.2 см–1 объяснена взаимодействием оротовой кислоты и молекул воды.</p></abstract><trans-abstract xml:lang="en"><p>The terahertz (THz) absorption spectrum of orotic acid monohydrate in the crystalline phase was experimentally obtained by using THz time-domain spectroscopy and computationally simulated by using density functional theory. Four distinct peaks were observed within the range of 12–128 cm–1, and were computationally reproduced by simulations using the Perdew–Burke–Ernzerhof functional. A comparison of the experimental and calculated data indicated that the measured peaks mostly originated from intermolecular forces in which the interactions between orotic acid molecules dominated. In addition, the feature located at 110.2 cm–1 was attributed to the interactions between orotic acid and water molecules. These findings demonstrate that THz spectroscopy can be used to monitor molecular dehydration during industrial production.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>терагерцовая спектроскопия во временной области</kwd><kwd>теория функционала плотности</kwd><kwd>моногидрат оротовой кислоты</kwd></kwd-group><kwd-group xml:lang="en"><kwd>terahertz time-domain spectroscopy</kwd><kwd>density functional theory</kwd><kwd>orotic acid monohydrate</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">This work was supported by the National Natural Science Foundation for Young Scientists of China (Grant No. 11604263) and the education department of Shaanxi Province (Grant No. 16JK1698). We thank Edanz (https://jp.edanz.com/ac) for editing a draft of this manuscript.</funding-statement><funding-statement xml:lang="en">This work was supported by the National Natural Science Foundation for Young Scientists of China (Grant No. 11604263) and the education department of Shaanxi Province (Grant No. 16JK1698). We thank Edanz (https://jp.edanz.com/ac) for editing a draft of this manuscript.</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">Y. Ueno, K. Ajito, Anal. Sci., 24, 185–192 (2008).</mixed-citation><mixed-citation xml:lang="en">Y. Ueno, K. Ajito, Anal. Sci., 24, 185–192 (2008).</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">L. Xie, Y. Yao, Y. Ying, Spectrosc. Rev., 49, 448–461 (2014).</mixed-citation><mixed-citation xml:lang="en">L. Xie, Y. Yao, Y. 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