Achieving Charge‐Transfer‐Featured Organic Room‐Temperature Phosphorescence with Combined High Efficiency and Long Lifetime via V‐Shaped D–A Dyads

IF 16.9 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Angewandte Chemie International Edition Pub Date : 2025-07-31 DOI:10.1002/anie.202508776

Kuan Chen, Binhao Li, Chuanhao Liu, Yanju Luo, Kaixin Yu, Mengjiao Jia, Yan Huang, Zhiyun Lu

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Abstract

The realization of long‐lived charge‐transfer‐based organic room‐temperature phosphorescence (3CT‐RTP, τPh = 210 ms) via the construction of U‐shaped donor–acceptor (D–A) dyads is impeded by suboptimal phosphorescence efficiency ( = 6%). Herein, we reveal that modifying the skeleton of D–A dyads from U‐shaped to V‐shaped configurations yields 3CT‐RTP with both long τPh (150–220 ms) and high (13%–25%). This improvement stems from preserving a substantial degree of forbiddenness in the radiative transition process of the compound while simultaneously increasing its D–A dihedral angle, which can promote more efficient spin‐orbit coupling and thus more rapid intersystem crossing. Additionally, augmenting the framework rigidity of a V‐shaped D–A dyad can potentially reduce the non‐radiative transition rate constant of triplet excitons (knr,T), thereby facilitating the attainment of long τPh and high .

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通过V形D-A二极体实现具有电荷转移特征的有机室温磷光，并结合了高效率和长寿命

通过构建U形供体-受体（D-A）二体来实现基于电荷转移的长寿命有机室温磷光（3CT - RTP, τPh = 210 ms），由于磷光效率不理想（= 6%）而受到阻碍。在此，我们发现将D-A二元体的骨架从U形修饰为V形构型，可以产生长τPh （150-220 ms）和高τPh（13%-25%）的3CT - RTP。这种改进源于在化合物的辐射跃迁过程中保留了相当程度的禁性，同时增加了其D-A二面角，这可以促进更有效的自旋轨道耦合，从而更快地在系统间交叉。此外，增加V型D-A二元体的框架刚度可以潜在地降低三重态激子的非辐射跃迁速率常数（knr，T），从而有助于实现长τPh和高τPh。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Angewandte Chemie International Edition 化学-化学综合

CiteScore

26.60

自引率

6.60%

发文量

3549

审稿时长

1.5 months

期刊介绍： Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.