Xin Xie, Teng Gao, Shaogang Shen, Zhi Pang, Yuanyuan Qin, Xinyi Lv, Ying Wang
{"title":"Suppression of Nonradiative Decay in TADF Emitters via a Macrocyclic Strategy: An Experimental Study","authors":"Xin Xie, Teng Gao, Shaogang Shen, Zhi Pang, Yuanyuan Qin, Xinyi Lv, Ying Wang","doi":"10.1021/acs.orglett.4c04202","DOIUrl":null,"url":null,"abstract":"To experimentally investigate the impact of macrocyclic structures on the nonradiative decay rate constants (<i>k</i><sub>nr</sub><sup>s</sup>) of thermally activated delayed fluorescence (TADF), a macrocyclic molecule L-ring and its analogue NL-ring were designed and synthesized. The photophysical measurements reveal their TADF characteristics, and the <i>k</i><sub>nr</sub><sup>s</sup> of the L-ring (4.19 × 10<sup>6</sup> s<sup>–1</sup>) is slower than that of the NL-ring (1.96 × 10<sup>7</sup> s<sup>–1</sup>), endowing the L-ring with a photoluminescence quantum yield of 92.00%. Therefore, the L-ring device exhibited a high external quantum efficiency of 25.61%.","PeriodicalId":54,"journal":{"name":"Organic Letters","volume":"11 1","pages":""},"PeriodicalIF":4.9000,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Organic Letters","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acs.orglett.4c04202","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ORGANIC","Score":null,"Total":0}
引用次数: 0
Abstract
To experimentally investigate the impact of macrocyclic structures on the nonradiative decay rate constants (knrs) of thermally activated delayed fluorescence (TADF), a macrocyclic molecule L-ring and its analogue NL-ring were designed and synthesized. The photophysical measurements reveal their TADF characteristics, and the knrs of the L-ring (4.19 × 106 s–1) is slower than that of the NL-ring (1.96 × 107 s–1), endowing the L-ring with a photoluminescence quantum yield of 92.00%. Therefore, the L-ring device exhibited a high external quantum efficiency of 25.61%.
期刊介绍：
Organic Letters invites original reports of fundamental research in all branches of the theory and practice of organic, physical organic, organometallic,medicinal, and bioorganic chemistry. Organic Letters provides rapid disclosure of the key elements of significant studies that are of interest to a large portion of the organic community. In selecting manuscripts for publication, the Editors place emphasis on the originality, quality and wide interest of the work. Authors should provide enough background information to place the new disclosure in context and to justify the rapid publication format. Back-to-back Letters will be considered. Full details should be reserved for an Article, which should appear in due course.
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