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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">vestich</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия химических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Chemical Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8331</issn><issn pub-type="epub">2524-2342</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8331-2026-62-1-78-88</article-id><article-id custom-type="elpub" pub-id-type="custom">vestich-1003</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>ТЕХНИЧЕСКАЯ ХИМИЯ И ХИМИЧЕСКАЯ ТЕХНОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TECHNICAL CHEMISTRY AND CHEMICAL ENGINEERING</subject></subj-group></article-categories><title-group><article-title>Хиральные допанты жидких кристаллов на основе терпеноидных кислот</article-title><trans-title-group xml:lang="en"><trans-title>Chiral liquid crystal dopants based on terpenoid acids</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-1616-7011</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бей</surname><given-names>М. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Bei</surname><given-names>M. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бей Максим Петрович – кандидат химических наук, доцент, заведущий лабораторией </p><p>ул. Ф. Скорины, 36, 220084, Минск</p></bio><bio xml:lang="en"><p>Bei Maksim P. – Ph. D. (Chemistry), Associate Professor, Head  of  the  Laboratory </p><p>36, F. Skorina Str., 220084, Minsk</p></bio><email xlink:type="simple">bey@ichnm.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0005-2383-5451</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ювченко</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Yuvchenko</surname><given-names>A. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ювченко Анатолий Петрович – кандидат химических наук, доцент, ведущий научный сотрудник</p><p>ул. Ф. Скорины, 36, 220084, Минск</p></bio><bio xml:lang="en"><p>Yuvchenko Anatolij P. – Ph. D. (Chemistry), Associate Professor, Leading Researcher </p><p>36, F. Skorina Str., 220084, Minsk</p></bio><email xlink:type="simple">mixa@ichnm.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>Муравский</surname><given-names>Ал. Ан.</given-names></name><name name-style="western" xml:lang="en"><surname>Muravskii</surname><given-names>Al. An.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Муравский Александр Анатольевич – кандидат физико-математических наук </p><p>ул. Ф. Скорины, 36, 220084, Минск</p></bio><bio xml:lang="en"><p>Muravsky Alexander A. – Ph. D. (Physics and Mathematics) </p><p>36, F. Skorina Str., 220084, Minsk</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>Дашкевич</surname><given-names>Д. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Dashkevich</surname><given-names>D. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дашкевич Доминика Сергеевна – младший научный сотрудник</p></bio><bio xml:lang="en"><p>Dashkevich Dominika S. – Junior Researcher </p><p>36, F. Skorina Str., 220084, Minsk</p></bio><email xlink:type="simple">dominika.chepeleva@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9755-7790</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Муравский</surname><given-names>Ан. Ал.</given-names></name><name name-style="western" xml:lang="en"><surname>Muravskii</surname><given-names>An. Al.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Муравский Анатолий Александрович – кандидат физико-математических наук, ведущий научный сотрудник </p><p>ул. Ф. Скорины, 36, 220084, Минск</p></bio><bio xml:lang="en"><p>Murauski Anatoli A. – Ph. D. (Physics and Mathematics), Leading Researcher </p><p>36, F. Skorina Str., 220084, Minsk</p></bio><email xlink:type="simple">anatoli_murauski@yahoo.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт химии новых материалов Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Chemistry of New Materials of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>04</day><month>03</month><year>2026</year></pub-date><volume>62</volume><issue>1</issue><fpage>78</fpage><lpage>88</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Бей М.П., Ювченко А.П., Муравский А.А., Дашкевич Д.С., Муравский А.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Бей М.П., Ювченко А.П., Муравский А.А., Дашкевич Д.С., Муравский А.А.</copyright-holder><copyright-holder xml:lang="en">Bei M.P., Yuvchenko A.P., Muravskii A.A., Dashkevich D.S., Muravskii A.A.</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://vestichem.belnauka.by/jour/article/view/1003">https://vestichem.belnauka.by/jour/article/view/1003</self-uri><abstract><p>Исследована закручивающая способность и совместимость ряда кислороди азотсодержащих производных терпеноидных кислот (малеопимаровая, цитраконопимаровая и фумаропимаровая) в жидкокристаллических (ЖК) композициях с положительной анизотропией диэлектрической проницаемости (ЖК-1285, Merck LC-6809-000, LC-6810-000, BN-104). На основе синтезированных оптически активных терпеноидных продуктов получены хиральные нематические ЖК-композиции и методом клина Кано–Гранжана определена сила кручения хиральной добавки (допанта). Проанализировано влияние структуры (наличие и тип заместителей, длина алкильных, алкоксильных и мезогенных групп) терпеноидного допанта на силу кручения и совместимость с ЖК-материалами. Методом дериватографии исследована термическая стабильность ряда производных малеопимаровой кислоты (амиды, имидоамиды) и проанализирована ее зависимость от структуры соединения. Приведены данные по величинам удельного вращения плоскости поляризации поляризованного света ([α]D ) для ряда полученных соединений. Определены электрооптические характеристики некоторых полученных хиральных ЖК-композиций с добавками амидов и имидоамида малеопимаровой кислоты. Показано, что применение разработанных добавок позволяет получать ЖК-материалы с управляемым селективным светопропусканием – перспективные для использования в различных оптических устройствах, в том числе при производстве энергоэффективных «умных окон», а также смарт-стекол для систем контроля приватности.</p></abstract><trans-abstract xml:lang="en"><p>The twisting power and compatibility of several oxygenand nitrogen-containing derivatives of terpenoid acids (maleopimaric, citraconopimaric and fumaropimaric) in liquid crystal (LC) compositions with positive anisotropy of permittivity (LC-1285, Merck LC-6809-000, LC-6810-000, BN-104) were studied. Chiral nematic LC compositions were prepared based on the synthesized optically active terpenoid products. The twisting power of the chiral additive (dopant) and the helix pitch of the resulting LC compositions were determined using the Cano-Grandjean wedge method. The effect of the structure (presence and type of substituents, length of alkyl, alkoxy and mesogenic groups) of the terpenoid dopant on the twisting power and compatibility with LC materials is analyzed. The thermal stability of a number of maleopimaric acid derivatives (amides, imidoamides) is studied by derivatography and its dependence on the compound structure is analyzed. Data on the values of specific rotation of the plane of polarized light ([α]D) are presented for a number of the compounds obtained. Electro-optical characteristics of some obtained chiral LC compositions with additives of maleopimaric amides and imidoamide were determined. It was shown that the developed dopants enable the synthesis of LC materials with controlled selective light transmission, promising for use in energy-efficient “smart windows” and smart glasses for privacy control systems.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>малеопимаровая кислота</kwd><kwd>цитраконопимароввая кислота</kwd><kwd>фумаропимаровая кислота</kwd><kwd>амид</kwd><kwd>имидоамид</kwd><kwd>азометин</kwd><kwd>жидкий кристалл</kwd><kwd>хиральная добавка (допант)</kwd></kwd-group><kwd-group xml:lang="en"><kwd>maleopimaric acid</kwd><kwd>citraconopimaric acid</kwd><kwd>fumaropimaric acid</kwd><kwd>amide</kwd><kwd>imidoamide</kwd><kwd>azomethine</kwd><kwd>liquid crystal</kwd><kwd>chiral dopant</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">Kitzerow, H.-S. Chirality in Liquid Crystals / H.-S. Kitzerow, C. 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