{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,3]],"date-time":"2026-11-03T22:52:18Z","timestamp":1793746338912,"version":"4.6.1"},"reference-count":49,"publisher":"AIP Publishing","issue":"17","funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["12374255"],"award-info":[{"award-number":["12374255"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012226","name":"Fundamental Research Funds for the Central Universities","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100012226","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2024,11,7]]},"abstract":"<jats:p>Doubly aromatic B82\u2212, a borozene analog of benzene (C6H6) due to their similar \u03c0 bonding, can be considered an ideal base for multi-layered molecular rotors. Here, we theoretically constructed the copper borozene complex Cu3B8\u2212 to investigate its stability and structural fluxionality. The lowest energy isomers consist of two-layered configurations: a B8 molecular wheel and a triangular Cu3 motif that either stands upright or lies flat above the B8 wheel. Both configurations exhibit structural fluxionality, as indicated by the free rotation of Cu3 with respect to the B8 molecular wheel, confirmed by Born\u2013Oppenheimer molecular dynamics simulations even at low temperatures. This fluxional behavior is associated with an ultra-soft vibrational mode of Cu3 (less than 10.0\u00a0cm\u22121) and a negligible rotational barrier of 0.01 kcal\/mol. Notably, high simulated temperatures cause irregular interconversion between the standing and lying orientations of Cu3 without regularity. Chemical bonding analysis confirmed that charge transfer from Cu3 to the B8 wheel renders Cu3B8\u2212 a typical copper borozene complex, [Cu3+][B82\u2212], where B82\u2212 has six delocalized \u03c0 and \u03c3 electrons. This electron delocalization contributes to a dilute and continuous electron cloud that underpins the dynamic behavior of the Cu3 trimer.<\/jats:p>","DOI":"10.1063\/5.0232564","type":"journal-article","created":{"date-parts":[[2024,11,6]],"date-time":"2024-11-06T16:41:19Z","timestamp":1730911279000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":8,"title":["Dual structural fluxionality in the copper borozene complex Cu3B8\u2212: A two-layered molecular rotor"],"prefix":"10.1063","volume":"161","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-4075-8885","authenticated-orcid":false,"given":"Jing-kai","family":"Xu","sequence":"first","affiliation":[{"name":"Institute of Atomic and Molecular Physics, Jilin University 1 , Changchun 130023,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-8046-6973","authenticated-orcid":false,"given":"Hui-yu","family":"Zhang","sequence":"additional","affiliation":[{"name":"Institute of Atomic and Molecular Physics, Jilin University 1 , Changchun 130023,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-7115-9506","authenticated-orcid":false,"given":"Li-juan","family":"Cui","sequence":"additional","affiliation":[{"name":"Institute of Atomic and Molecular Physics, Jilin University 1 , Changchun 130023,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0710-1774","authenticated-orcid":false,"given":"Zhong-hua","family":"Cui","sequence":"additional","affiliation":[{"name":"Institute of Atomic and Molecular Physics, Jilin University 1 , Changchun 130023,","place":["China"]},{"name":"Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), Jilin University 2 , Changchun 130023,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"317","published-online":{"date-parts":[[2024,11,6]]},"reference":[{"key":"2024110616411381000_c1","doi-asserted-by":"publisher","first-page":"1281","DOI":"10.1021\/cr0300993","article-title":"Artificial molecular rotors","volume":"105","year":"2005","journal-title":"Chem. 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