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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/2220-8054-2020-11-1-14-24</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-462</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="en"><subject>MATHEMATICS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МАТЕМАТИКА</subject></subj-group></article-categories><title-group><article-title>Topological properties of some nanostructures</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Mondal</surname><given-names>S.</given-names></name></name-alternatives><email xlink:type="simple">souravmath94@gmail.com</email></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Bhosale</surname><given-names>A.</given-names></name></name-alternatives><email xlink:type="simple">bhosaleakshay78@gmail.com</email></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>De</surname><given-names>N.</given-names></name></name-alternatives><bio xml:lang="en"><p>Kolkata</p></bio><email xlink:type="simple">de.nilanjan@rediffmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Pal</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="en"><p>NIT Durgapur</p></bio><email xlink:type="simple">anita.buie@gmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Department of Basic Sciences and Humanities (Mathematics), Calcutta Institute of Engineering and Management</institution><country>India</country></aff><aff xml:lang="en" id="aff-2"><institution>Department of mathematics</institution><country>India</country></aff><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>31</day><month>07</month><year>2025</year></pub-date><volume>11</volume><issue>1</issue><elocation-id>14–24</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Mondal S., Bhosale A., De N., Pal A., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Mondal S., Bhosale A., De N., Pal A.</copyright-holder><copyright-holder xml:lang="en">Mondal S., Bhosale A., De N., Pal 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://nanojournal.ifmo.ru/jour/article/view/462">https://nanojournal.ifmo.ru/jour/article/view/462</self-uri><abstract><p>Topological indices are numerical values associated with chemical constitution describing the structures of chemical compounds and helping to predict different physicochemical properties. In this report, some newly designed topological descriptors, namely, neighborhood Zagreb index (MN), neighborhood version of Forgotten topological index (FN), modified neighborhood version of Forgotten topological index (FN∗ ), neighborhood version of second Zagreb index (), neighborhood version of hyper Zagreb index (HMN) are obtained for the TURC4C8(S), armchair nanotube TUAC6, V-phenylenic nanotube V PHX[m,n], and V-phenylenic nanotori V PHY [m,n].</p></abstract><kwd-group xml:lang="en"><kwd>Topological indices</kwd><kwd>TURC4C8(S)</kwd><kwd>armchair nanotube (TUAC6)</kwd><kwd>V-phenylenic nanotube (V PHX[m</kwd><kwd>n])</kwd><kwd>V-phenylenic nanotori (V PHY [m</kwd><kwd>n])</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The first author is very obliged to the Department of Science and Technology (DST), Government of India for the Inspire Fellowship [IF170148].</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">Trinajstic N.´ Chemical Graph Theory. 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