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Here, we report the synthesis and time\u2010resolved spectroscopic characterization of two isomeric tubular all\u2010benzene nanocarbon (TANC) molecules, named\n                    <jats:italic>meso<\/jats:italic>\n                    \u2010 and\n                    <jats:italic>chiral<\/jats:italic>\n                    \u2010TANC, respectively. Structurally, they feature triple covalent linkages, with different connectivity, between coaxially stacked cycloparaphenylene units. While\n                    <jats:italic>meso<\/jats:italic>\n                    \u2010TANC maintains conformational rigidity,\n                    <jats:italic>chiral<\/jats:italic>\n                    \u2010TANC shows photo\u2010induced dynamic helicity. Femtosecond transient absorption (TA) and time\u2010resolved circularly polarized luminescence (TRCPL) spectroscopy demonstrate that\n                    <jats:italic>chiral<\/jats:italic>\n                    \u2010TANC undergoes ultrafast relaxation accompanied by untwisting motions within 8\u00a0ps upon photoexcitation, establishing the direct correlation between photo\u2010induced conformational evolution and chiroptical dynamics in heteroatom\u2010free, fully conjugated molecules.\n                  <\/jats:p>","DOI":"10.1002\/anie.202518587","type":"journal-article","created":{"date-parts":[[2025,10,3]],"date-time":"2025-10-03T11:11:48Z","timestamp":1759489908000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Tubular All\u2010Benzene Nanocarbon with Evolving Excited\u2010State 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Academy of Sciences University of Chinese Academy of Sciences  Beijing 100190 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jia\u2010Nan","family":"Gao","sequence":"additional","affiliation":[{"name":"Key Laboratory of Photochemical Conversion and Optoelectronic Materials CAS\u2010HKU Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, School of Future Technology, Chinese Academy of Sciences University of Chinese Academy of Sciences  Beijing 100190 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xueliang","family":"Shi","sequence":"additional","affiliation":[{"name":"Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering East China Normal University  Shanghai 200062 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hongwei","family":"Li","sequence":"additional","affiliation":[{"name":"College of Chemistry and Molecular Engineering, Beijing NMR Center Peking University  Beijing 100871 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zi\u2010Tong","family":"Li","sequence":"additional","affiliation":[{"name":"Key Laboratory of Photochemical Conversion and Optoelectronic Materials CAS\u2010HKU Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, School of Future Technology, Chinese Academy of Sciences University of Chinese Academy of Sciences  Beijing 100190 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zi\u2010Ye","family":"Huo","sequence":"additional","affiliation":[{"name":"Key Laboratory of Photochemical Conversion and Optoelectronic Materials CAS\u2010HKU Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, School of Future Technology, Chinese Academy of Sciences University of Chinese Academy of Sciences  Beijing 100190 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