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<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Archiving and Interchange DTD with OASIS Tables with MathML3 v1.4 20241031//EN" "https://jats.nlm.nih.gov/archiving/1.4/JATS-archive-oasis-article1-4-mathml3.dtd">
<article xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" dtd-version="1.4" article-type="research-article" xml:lang="en"><front><journal-meta><journal-title-group><journal-title xml:lang="ru">Математическая физика и компьютерное моделирование</journal-title></journal-title-group><issn publication-format="print">2587-6325</issn><issn publication-format="electronic">2587-6902</issn></journal-meta><article-meta><article-id pub-id-type="doi">10.15688/mpcm.jvolsu.2023.2.6</article-id><article-categories><subj-group><subject>Other</subject></subj-group></article-categories><title-group><article-title xml:lang="ru">Оценка сродства к электрону по данным о временах жизни отрицательных молекулярных ионов p-кумаровой и кумарин-3-карбоновых кислот</article-title><trans-title-group xml:lang="en"><trans-title>Electron Affinity Evaluation Using Anion Lifetime for p-Coumaric and Coumarin-3-Carboxylic Acids</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Таюпов</surname><given-names>Мансаф Масхутович</given-names></name><name xml:lang="en"><surname>Tayupov</surname><given-names>Mansaf M.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><email>tayupovmansaf@yandex.ru</email><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2876-3910</contrib-id></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Маркова</surname><given-names>Ангелина Вячеславовна</given-names></name><name xml:lang="en"><surname>Markova</surname><given-names>Angelina V.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><email>login.markova@yandex.ru</email><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7846-6500</contrib-id></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Сафронов</surname><given-names>Алексей Михайлович</given-names></name><name xml:lang="en"><surname>Safronov</surname><given-names>Aleksey M.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><email>prozzy95@gmail.com</email><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2922-170X</contrib-id></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Рахмеев</surname><given-names>Рустам Габдулшагитович</given-names></name><name xml:lang="en"><surname>Rakhmeev</surname><given-names>Rustam G.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><email>rakhmeev@yandex.com</email><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3735-4622</contrib-id></contrib><aff-alternatives id="aff1"><aff xml:lang="en"><institution>Institute of Molecule and Crystal Physics, Ufa Federal Research Center of the Russian Academy of Sciences(Ufa, Russian Federation)</institution></aff><aff xml:lang="ru"><institution>Институт физики молекул и кристаллов, Уфимский федеральный исследовательский центр РАН (г. Уфа, Российская Федерация)</institution></aff></aff-alternatives></contrib-group><pub-date pub-type="epub" iso-8601-date="2023-05-20"><day>20</day><month>05</month><year>2023</year></pub-date><volume>26</volume><issue>2</issue><fpage>61</fpage><lpage>72</lpage><history><date date-type="received" iso-8601-date="2023-03-13"><day>13</day><month>03</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-05-12"><day>12</day><month>05</month><year>2023</year></date></history><permissions><license xlink:href="https://creativecommons.org/licenses/by-nc/4.0/" xlink:title="CC BY-NC 4.0"><ali:license_ref>https://creativecommons.org/licenses/by-nc/4.0/</ali:license_ref><license-p xml:lang="ru">CC BY-NC 4.0</license-p></license></permissions><abstract xml:lang="ru"><p>Методом масс-спектрометрии отрицательных ионов резонансного захвата электронов исследованы молекулы p-кумаровой и кумарин-3-карбоновой кислот. Экспериментально измерено среднее время жизни отрицательных молекулярных ионов относительно самопроизвольного выброса электрона. В рамках приближения Аррениуса была оценена величина адиабатического сродства к электрону (EAa). Установлено, что теоретические значения EAa, вычисленные методом B3LYP/6-31+G(d) с минимальными добавлением диффузных функций как разность полных энергий нейтральной молекулы и анион радикала, хорошо коррелируют с величинами EAa, полученными из эксперимента.</p></abstract><abstract xml:lang="en" abstract-type="summary"><p>The molecules of p-coumaric and coumarin-3-carboxylic acids were studied by the method of mass spectrometry of negative ions of resonant electron attachment. The average lifetime of negative molecular ions relative to spontaneous electron emission has been experimentally measured. With Arrhenius approximation, the value of the adiabatic electron affinity (EAa) was estimated. It is established that the theoretical values of EAa calculated by the B3LYP/6-31+G(d) method with minimal addition of diffuse functions as the difference of the total energies of the neutral molecule and the radical anion correlate well with the values of EAa obtained from the experiment.</p></abstract><kwd-group xml:lang="ru"><kwd>токсичность</kwd><kwd>свободные радикалы</kwd><kwd>резонансный захват электрона</kwd><kwd>антиоксиданты</kwd></kwd-group><kwd-group xml:lang="en"><kwd>toxicity</kwd><kwd>free radicals</kwd><kwd>resonant electron attachment</kwd><kwd>antioxidants</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование проведено при поддержке Российского научного фонда, проект №19-13-00021П.</funding-statement><funding-statement xml:lang="en">The study was supported by the Russian Science Foundation, project No. 19-13-00021P.</funding-statement></funding-group></article-meta></front><back><ref-list><ref id="ref1"><mixed-citation publication-type="other" xml:lang="ru">Методы спектроскопии диссоциативного захвата электронов и теории функционала плотности для моделирования биологической активности производных хиноксалина / М. 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