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Here, we report the design and facile synthesis of a novel tetraboron\u2013oxygen covalent bonds, nitrogen\u2010integrated PAH (QBO\u20101) and its derivative with an additional pyridinic nitrogen doping (QBO\u2010Py) using the same methoxy\u2010directed, lithium\u2010free one\u2010shot borylation route on a gram scale. Both QBO\u20101 and QBO\u2010Py emitters exhibit ultra\u2010narrowband violet emission with full width at half\u2010maximum (FWHM) values of 7.4 and 8.6\u00a0nm in toluene and 9.5 and 11.2\u00a0nm in organic light\u2010emitting diodes (OLEDs), respectively. The electroluminescent results of QBO\u20101 represents the narrowest reported for organic systems in terms of in nanometers. Moreover, the strategically replacing the benzene\u2010core in QBO\u20101 with a pyridine in QBO\u2010Py substantially reduced singlet\u2010triplet energy gap, thereby enabling QBO\u2010Py with evident thermally activated delayed fluorescence properties and leading to high external quantum efficiency of 14.5% in OLEDs. This work pioneers the integration of pyridinic nitrogen in multi\u2010boron PAHs, demonstrating its key role in simultaneously tuning the energy gap and suppressing spectral broadening, thus providing a new design route for high\u2010purity, high\u2010efficiency OLED emitters.<\/jats:p>","DOI":"10.1002\/anie.8471593","type":"journal-article","created":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T07:34:26Z","timestamp":1789976066000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Methoxy\u2010Directed, Lithium\u2010Free One\u2010Shot Borylation for Tetraboron\u2010, Pyridinic and Amino Nitrogen\u2010Integrated PAHs With Ultra\u2010Narrowband Thermally Activated Delayed Fluorescence"],"prefix":"10.1002","author":[{"given":"Zhang\u2010Li","family":"Cheng","sequence":"first","affiliation":[{"name":"State Key Laboratory of Bioinspired Interfacial Materials Science, Institute of Functional Nano &amp; Soft Materials (FUNSOM) Soochow University Suzhou Jiangsu P.R. 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