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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-322</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>ТЕМПЕРАТУРНАЯ ЗАВИСИМОСТЬ СПЕКТРОВ ЛЮМИНЕСЦЕНЦИИ И ФАЗОВЫЕ ПЕРЕХОДЫ ЖИДКОГО КРИСТАЛЛА 5СВ</article-title><trans-title-group xml:lang="en"><trans-title>TEMPERATURE DEPENDENCE OF THE LUMINESCENCE SPECTRA OF A 5СВ LIQUID CRYSTAL AND ITS PHASE TRANSITIONS</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>Клишевич</surname><given-names>Г. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Klishevich</surname><given-names>G. V.</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>Курмей</surname><given-names>Н. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Kurmei</surname><given-names>N. D.</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>Мельник</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Melnik</surname><given-names>V. I.</given-names></name></name-alternatives><email xlink:type="simple">melnyk@iop.kiev.ua</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>Терещенко</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Tereshchenko</surname><given-names>A. G.</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 НАН Украины</institution></aff><aff xml:lang="en"><institution>Institute of Physics of the National Academy of Sciences of Ukraine</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>10</day><month>03</month><year>2020</year></pub-date><volume>85</volume><issue>5</issue><fpage>803</fpage><lpage>807</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Клишевич Г.В., Курмей Н.Д., Мельник В.И., Терещенко А.Г., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Клишевич Г.В., Курмей Н.Д., Мельник В.И., Терещенко А.Г.</copyright-holder><copyright-holder xml:lang="en">Klishevich G.V., Kurmei N.D., Melnik V.I., Tereshchenko A.G.</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/322">https://zhps.ejournal.by/jour/article/view/322</self-uri><abstract><p>В температурном интервале 4.2-297 К изучены спектрально-люминесцентные свойства жидкого кристалла 4-пентил-4'-цианобифенила CH3(CH2)4(C6H4)2CN (5СВ). Показано, что при повышении температуры имеет место длинноволновый сдвиг спектров флуоресценции. Проведен анализ длинноволновых смещений спектров. Сопоставление температурных зависимостей положения максимума полосы излучения lmax и ее полуширины Δl/2, а также данных дифференциальной сканирующей калориметрии показало, что в 5СВ при температурах ~230 и ~260 К имеют место фазовые переходы.</p></abstract><trans-abstract xml:lang="en"><p>The spectral-luminescence properties of the 4-cyano-4'-pentylbiphenyl CH3(CH2)4(C6H4)2CN (5CB) liquid crystal has been studied in the temperature range 4.2-297 K. It is shown that at increasing temperature the fluorescence spectra are shifted to the red side. The spectral long-wavelength shifts are also analyzed. A comparison of the temperature behaviour position of the emission of the band maxima lmax and their half-widths Δl/2 in the fluorescence spectra and the results of the DSC-investigation show that phase transitions occur in 5CB liquid crystals at T ~ 230 and 260 K.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>жидкий кристалл</kwd><kwd>люминесценция</kwd><kwd>фазовый переход</kwd><kwd>конформационные изменения</kwd><kwd>низкая температура</kwd><kwd>дифференциальная сканирующая калориметрия</kwd><kwd>iquid crystal</kwd><kwd>luminescence</kwd><kwd>phase transition</kwd><kwd>conformation change</kwd><kwd>low temperature</kwd><kwd>differential scanning calorimetry</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">T. Hanemann, W. Haase, J. Svoboda, H. Fuess. Liq. Cryst., 19 (1995) 699-702</mixed-citation><mixed-citation xml:lang="en">T. Hanemann, W. Haase, J. Svoboda, H. 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