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Spectroscopic studies and theoretical calculations demonstrated that the aromatic amides can promote strong spin\u2010orbit coupling between (\u03c0,\u03c0*) and the bridged (n,\u03c0*) states, and enable multiple channels to populate the emissive\n                    <jats:sup>3<\/jats:sup>\n                    (\u03c0,\u03c0*), as well as facilitate robust hydrogen bonding with polyvinyl alcohol to suppress non\u2010radiative relaxations. Isolated inherent deep\u2010blue (0.155, 0.056) to sky\u2010blue (0.175, 0.232) phosphorescence with high quantum yields (up to 34.7\u2009%) in confined films are achieved. The blue afterglow of the films can last for several seconds and are showcased in information display, anti\u2010counterfeiting, and white light afterglow. Owing to the high population of\n                    <jats:sup>3<\/jats:sup>\n                    (\u03c0,\u03c0*) states, the smart aromatic amide skeleton provides an important molecular design prototype to manipulate triplet excited states for ultralong phosphorescence with various colors.\n                  <\/jats:p>","DOI":"10.1002\/anie.202300927","type":"journal-article","created":{"date-parts":[[2023,3,2]],"date-time":"2023-03-02T09:41:33Z","timestamp":1677750093000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":50,"title":["Aromatic Amides: A Smart Backbone toward Isolated Ultralong Bright Blue\u2010Phosphorescence in Confined Polymeric Films"],"prefix":"10.1002","volume":"62","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-9370-0756","authenticated-orcid":false,"given":"Ke","family":"Zhang","sequence":"first","affiliation":[{"name":"Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences School of Future Technology University of Chinese Academy of Sciences New Cornerstone Science Laboratory  Beijing 100190 P. 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