{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,2]],"date-time":"2026-04-02T03:13:16Z","timestamp":1775099596888,"version":"3.50.1"},"reference-count":53,"publisher":"Wiley","issue":"24","license":[{"start":{"date-parts":[[2025,10,26]],"date-time":"2025-10-26T00:00:00Z","timestamp":1761436800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["ChemPhysChem"],"published-print":{"date-parts":[[2025,12,16]]},"abstract":"<jats:p>\n                    The application of \u03c0\u2010electron localization function (ELF\n                    <jats:sub>\u03c0<\/jats:sub>\n                    ) bifurcation topology is extended here to assess excited state aromaticity (ESA). The analysis employs two topological descriptors: the ring\u2010closure bifurcation value (RCBV), which marks the onset of annular \u03c0\u2010delocalization, and the span of bifurcation values (DBV), which measures its uniformity. Thresholds proposed for ground\u2010state systems are applied here, while values below the aromatic limit (RCBV\u2009&lt;\u20090.70) are interpreted with caution, since delocalization\u2010based indices cannot unambiguously separate nonaromatic from antiaromatic cases. The methodology is applied to benzene, cyclobutadiene, cyclooctatetraene, and naphthalene across their S\n                    <jats:sub>0<\/jats:sub>\n                    , S\n                    <jats:sub>1<\/jats:sub>\n                    , and T\n                    <jats:sub>1<\/jats:sub>\n                    states. As benchmarks, the nonaromatic 1,4\u2010dihydrobenzene in its ground state is also included, and the problematic case of borazine is discussed based on literature values. ELF\n                    <jats:sub>\u03c0<\/jats:sub>\n                    descriptors reproduce the expected aromatic and antiaromatic trends and complement magnetic and electronic indices reported in the literature, while highlighting ambiguous regimes where additional analysis is required. Overall, ELF\n                    <jats:sub>\u03c0<\/jats:sub>\n                    bifurcation analysis provides a chemically meaningful and computationally efficient framework for probing aromaticity in excited states, offering a topological perspective that complements conventional energetic and magnetic descriptors.\n                  <\/jats:p>","DOI":"10.1002\/cphc.202500335","type":"journal-article","created":{"date-parts":[[2025,10,27]],"date-time":"2025-10-27T00:25:12Z","timestamp":1761524712000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Excited State Aromaticity Unveiled by Electron Localization Function Topology"],"prefix":"10.1002","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4605-2741","authenticated-orcid":false,"given":"Andrea","family":"Echeverri","sequence":"first","affiliation":[{"name":"Departamento de F\u00edsica Facultad de Ciencias Universidad de Chile  Las Palmeras 3425 7750000 Santiago Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4210-1868","authenticated-orcid":false,"given":"Luis","family":"Leyva\u2010Parra","sequence":"additional","affiliation":[{"name":"Centro de Investigaci\u00f3n para el Dise\u00f1o de Materiales (CEDEM) Facultad de Ciencias Exactas Departamento de Ciencias Qu\u00edmicas Universidad Andr\u00e9s Bello  Avenida Rep\u00fablica 275 8370146 Santiago Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3389-5544","authenticated-orcid":false,"given":"Juan C.","family":"Santos","sequence":"additional","affiliation":[{"name":"Departamento de Ciencias Biol\u00f3gicas y Qu\u00edmicas Facultad de Ciencias Universidad San Sebasti\u00e1n  Campus Los Leones Providencia, 7500000 Santiago Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6127-330X","authenticated-orcid":false,"given":"Tatiana","family":"G\u00f3mez","sequence":"additional","affiliation":[{"name":"Theoretical and Computational Chemistry Center Institute of Applied Sciences Faculty of Engineering Universidad Aut\u00f3noma de Chile  Avenida Pedro de Valdivia 425 8580000 Santiago Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6061-8879","authenticated-orcid":false,"given":"William","family":"Tiznado","sequence":"additional","affiliation":[{"name":"Centro de Investigaci\u00f3n para el Dise\u00f1o de Materiales (CEDEM) Facultad de Ciencias Exactas Departamento de Ciencias Qu\u00edmicas Universidad Andr\u00e9s Bello  Avenida Rep\u00fablica 275 8370146 Santiago Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0648-6502","authenticated-orcid":false,"given":"Carlos","family":"Cardenas","sequence":"additional","affiliation":[{"name":"Departamento de F\u00edsica Facultad de Ciencias Universidad de Chile  Las Palmeras 3425 7750000 Santiago Chile"},{"name":"Center for the Development of Nanoscience and Nanotechnology (CEDENNA)  Av. 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