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This resulting [\n                    <jats:bold>PDI<\/jats:bold>\n                    \u2013\n                    <jats:bold>MeR<\/jats:bold>\n                    ]\n                    <jats:bold>\n                      <jats:sup>\u2022\u2212<\/jats:sup>\n                    <\/jats:bold>\n                    (R = BZ, benzene; NP, naphthalene; PY, pyrene) shows a high quantum yield, a long lifetime, and a high stability in air, as the ring size increases. The key to these properties is the combination of PDIN's aromaticity with predominant through\u2010space charge\u2010transfer (TSCT). This finding provides fundamental insights into unique open\u2010shell electronic structures and tunable optical functions, thereby paving the way for the development of novel doublet emitters and electroactive materials.\n                  <\/jats:p>","DOI":"10.1002\/advs.75858","type":"journal-article","created":{"date-parts":[[2026,6,15]],"date-time":"2026-06-15T15:28:28Z","timestamp":1781537308000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Aromaticity\u2010Engineered Open\u2010Shell Radical Anions for Air\u2010Stable Doublet Emission in\n                    <i>N<\/i>\n                    \u2010Annulated Perylene Diimide"],"prefix":"10.1002","volume":"13","author":[{"given":"Jeongyoon","family":"Kim","sequence":"first","affiliation":[{"name":"Department of Advanced Materials Chemistry and Division of Smart Energy Convergence Engineering Korea University  Sejong Republic of 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