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However, except for electrophilic aromatic borylation reactions, synthetic strategies for the generation of boron\u2010containing MR\u2010TADF molecules remain virtually unexplored. In particular, the synthesis of MR\u2010TADF emitters that exhibit narrow near\u2010ultraviolet and pure deep\u2010blue emission constitutes a challenging task. Here, we present a directed tri\u2010\n                    <jats:italic>ortho<\/jats:italic>\n                    \u2010lithiation\u2013borylation approach that provides a new family of\n                    <jats:italic>N<\/jats:italic>\n                    ,\n                    <jats:italic>N<\/jats:italic>\n                    \u2010bridge\u2010type triphenylboranes that bear phenylimino groups instead of the methylene groups at the 8\u2010 and 14\u2010positions and ether groups instead of the hydrogen atoms at the 3\u2010 and 19\u2010positions of 1\u2010borapentacyclohenicosanonaene. The effects of the electron\u2010donating resonance of the oxygen atoms of the ether groups and the incorporation of oxygen atoms in the six\u2010membered cycle allow the precise tuning of the HOMO\u2013LUMO energy gaps, resulting in narrowband near\u2010ultraviolet and pure deep\u2010blue TADF with Commission\u2010International\u2010de\u2010l\u2019\u00c9clairage coordinates (CIE\n                    <jats:italic>\n                      <jats:sub>x<\/jats:sub>\n                    <\/jats:italic>\n                    <jats:sub>,<\/jats:sub>\n                    <jats:italic>\n                      <jats:sub>y<\/jats:sub>\n                    <\/jats:italic>\n                    ) of (0.142\u20130.160, 0.029\u20130.063) for the photoluminescence (PL) and (0.146\u20130.160, 0.026\u20130.053) for the electroluminescence (EL). The CIE\n                    <jats:italic>\n                      <jats:sub>x<\/jats:sub>\n                    <\/jats:italic>\n                    <jats:sub>,<\/jats:sub>\n                    <jats:italic>\n                      <jats:sub>y<\/jats:sub>\n                    <\/jats:italic>\n                    for the EL meet the BT.2020 requirement for the blue primary of ultrahigh\u2010definition displays.\n                  <\/jats:p>","DOI":"10.1002\/anie.202510891","type":"journal-article","created":{"date-parts":[[2025,6,6]],"date-time":"2025-06-06T05:30:43Z","timestamp":1749187843000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Molecular Design and Synthesis of Narrowband Near\u2010Ultraviolet and Pure Deep\u2010Blue Thermally Activated Delayed Fluorescence Materials by an Ether Group Strategy"],"prefix":"10.1002","volume":"64","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4827-6375","authenticated-orcid":false,"given":"Yuichi","family":"Kitamoto","sequence":"first","affiliation":[{"name":"Department of Biomolecular Engineering, Graduate School of Engineering Tohoku University  6\u20106\u201011 Aramaki\u2010Aoba, Aoba\u2010ku Sendai 980\u20108579 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Atsuya","family":"Ogawa","sequence":"additional","affiliation":[{"name":"Department of Biomolecular Engineering, Graduate School of Engineering Tohoku University  6\u20106\u201011 Aramaki\u2010Aoba, Aoba\u2010ku Sendai 980\u20108579 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masaya","family":"Inakawa","sequence":"additional","affiliation":[{"name":"Department of Biomolecular Engineering, Graduate School of Engineering Tohoku University  6\u20106\u201011 Aramaki\u2010Aoba, Aoba\u2010ku Sendai 980\u20108579 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1202-8065","authenticated-orcid":false,"given":"Yutaka","family":"Fujimoto","sequence":"additional","affiliation":[{"name":"Department of Applied Chemistry, Graduate School of Engineering Tohoku University  6\u20106\u201011 Aramaki\u2010Aoba, Aoba\u2010ku Sendai 980\u20108579 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0905-2144","authenticated-orcid":false,"given":"Masanori","family":"Koshimizu","sequence":"additional","affiliation":[{"name":"Research Institute of Electronics Shizuoka University  3\u20105\u20101 Johoku, Naka\u2010ku Hamamatsu 432\u20108011 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kazuma","family":"Oda","sequence":"additional","affiliation":[{"name":"KONICA MINOLTA, INC.  2970 Ishikawa\u2010Machi, Hachioji\u2010shi Tokyo 192\u20108505 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hideo","family":"Taka","sequence":"additional","affiliation":[{"name":"KONICA MINOLTA, INC.  2970 Ishikawa\u2010Machi, Hachioji\u2010shi Tokyo 192\u20108505 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3158-2942","authenticated-orcid":false,"given":"Hiroshi","family":"Kita","sequence":"additional","affiliation":[{"name":"KONICA MINOLTA, INC.  2970 Ishikawa\u2010Machi, Hachioji\u2010shi Tokyo 192\u20108505 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8422-4674","authenticated-orcid":false,"given":"Tetsutaro","family":"Hattori","sequence":"additional","affiliation":[{"name":"Department of Biomolecular Engineering, Graduate School of Engineering Tohoku University  6\u20106\u201011 Aramaki\u2010Aoba, Aoba\u2010ku Sendai 980\u20108579 Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,6,16]]},"reference":[{"key":"e_1_2_5_1_1","doi-asserted-by":"publisher","DOI":"10.1021\/cr050966z"},{"key":"e_1_2_5_2_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.5b00190"},{"key":"e_1_2_5_3_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.6b00076"},{"key":"e_1_2_5_4_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.8b00186"},{"key":"e_1_2_5_5_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.8b00637"},{"key":"e_1_2_5_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/1521-3773(20020816)41:16<2927::AID-ANIE2927>3.0.CO;2-L"},{"key":"e_1_2_5_7_1","doi-asserted-by":"publisher","DOI":"10.1351\/pac200678071413"},{"key":"e_1_2_5_8_1","doi-asserted-by":"publisher","DOI":"10.1039\/C5CC00175G"},{"key":"e_1_2_5_9_1","doi-asserted-by":"publisher","DOI":"10.1039\/C6SC04245G"},{"key":"e_1_2_5_10_1","doi-asserted-by":"publisher","DOI":"10.1002\/ajoc.201700495"},{"key":"e_1_2_5_11_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja211944q"},{"key":"e_1_2_5_12_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja3036042"},{"key":"e_1_2_5_13_1","doi-asserted-by":"publisher","DOI":"10.1039\/C5CC07208E"},{"key":"e_1_2_5_14_1","doi-asserted-by":"publisher","DOI":"10.1039\/C6DT03526D"},{"key":"e_1_2_5_15_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.1c04251"},{"key":"e_1_2_5_16_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.4c02407"},{"key":"e_1_2_5_17_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201506335"},{"key":"e_1_2_5_18_1","doi-asserted-by":"publisher","DOI":"10.1039\/C6CC02440H"},{"key":"e_1_2_5_19_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201701246"},{"key":"e_1_2_5_20_1","doi-asserted-by":"publisher","DOI":"10.1039\/D0CC08331C"},{"key":"e_1_2_5_21_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.joc.3c00275"},{"key":"e_1_2_5_22_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201505491"},{"key":"e_1_2_5_23_1","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.201908677"},{"key":"e_1_2_5_24_1","doi-asserted-by":"publisher","DOI":"10.1002\/adpr.202200201"},{"key":"e_1_2_5_25_1","doi-asserted-by":"publisher","DOI":"10.1002\/adom.202201714"},{"key":"e_1_2_5_26_1","doi-asserted-by":"publisher","DOI":"10.1038\/nature11687"},{"key":"e_1_2_5_27_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201605444"},{"key":"e_1_2_5_28_1","doi-asserted-by":"publisher","DOI":"10.1088\/2050-6120\/aa537e"},{"key":"e_1_2_5_29_1","doi-asserted-by":"publisher","DOI":"10.1246\/cl.200915"},{"key":"e_1_2_5_30_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41566-019-0476-5"},{"key":"e_1_2_5_31_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467-019-08495-5"},{"key":"e_1_2_5_32_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.3c02873"},{"key":"e_1_2_5_33_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202107951"},{"key":"e_1_2_5_34_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202205684"},{"key":"e_1_2_5_35_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41566-022-01083-y"},{"key":"e_1_2_5_36_1","doi-asserted-by":"publisher","DOI":"10.1002\/advs.202303504"},{"key":"e_1_2_5_37_1","doi-asserted-by":"publisher","DOI":"10.1002\/advs.202101137"},{"key":"e_1_2_5_38_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202206916"},{"key":"e_1_2_5_39_1","doi-asserted-by":"publisher","DOI":"10.1039\/D2CC03347J"},{"key":"e_1_2_5_40_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202215226"},{"key":"e_1_2_5_41_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202308314"},{"key":"e_1_2_5_42_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467-024-46619-8"},{"key":"e_1_2_5_43_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202402289"},{"key":"e_1_2_5_44_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41566-024-01508-w"},{"key":"e_1_2_5_45_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41566-019-0359-9"},{"key":"e_1_2_5_46_1","doi-asserted-by":"publisher","DOI":"10.1039\/D0CS01580F"},{"key":"e_1_2_5_47_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.9b13704"},{"key":"e_1_2_5_48_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202004072"},{"key":"e_1_2_5_49_1","doi-asserted-by":"publisher","DOI":"10.3389\/fchem.2022.990918"},{"key":"e_1_2_5_50_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202215522"},{"key":"e_1_2_5_51_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202300997"},{"key":"e_1_2_5_52_1","doi-asserted-by":"publisher","DOI":"10.1002\/adom.202301626"},{"key":"e_1_2_5_53_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202316479"},{"key":"e_1_2_5_54_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202105032"},{"key":"e_1_2_5_55_1","doi-asserted-by":"publisher","DOI":"10.1039\/D3CS00837A"},{"key":"e_1_2_5_56_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.7b10578"},{"key":"e_1_2_5_57_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202012891"},{"key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numbers 2416877 (for2) and 2416890 (for6\u00b7hexane) contain the supplementary crystallographic data for this paper. These data are provided free of charge by the joint Cambridge Crystallographic Data Centre and Fachinformationszentrum KarlsruheAccess Structuresservice."}],"container-title":["Angewandte Chemie International Edition"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/anie.202510891","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,12,2]],"date-time":"2025-12-02T09:28:21Z","timestamp":1764667701000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/anie.202510891"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,6,16]]},"references-count":71,"journal-issue":{"issue":"32","published-print":{"date-parts":[[2025,8,4]]}},"alternative-id":["10.1002\/anie.202510891"],"URL":"https:\/\/doi.org\/10.1002\/anie.202510891","archive":["Portico"],"relation":{},"ISSN":["1433-7851","1521-3773"],"issn-type":[{"value":"1433-7851","type":"print"},{"value":"1521-3773","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,6,16]]},"assertion":[{"value":"2025-05-19","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-06-06","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-06-16","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"e202510891"}}