Delayed Doublet Emission in a Cerium(III) Complex

IF 16.9 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Peiyu Fang, Jiawen Liu, Huanyu Liu, Dr. Gang Yu, Pengxiang Fu, Prof. Bingwu Wang, Prof. Jianglan Qu, Prof. Yanyi Huang, Prof. Zuqiang Bian, Prof. Zhiwei Liu
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引用次数: 0

Abstract

Doublet emission from open-shell molecules has demonstrated its research and application value in recent years. However, understandings of the photoluminescence mechanism of open-shell molecules are far less than that of closed-shell molecules, leading to challenges in molecular design of efficient doublet emission systems. Here we report a cerium(III) 4-(9H-carbozol-9-yl)phenyl-tris(pyrazolyl)borate complex Ce(CzPhTp)3 with a new luminescence mechanism of delayed doublet emission, which also represents the first example with metal-centered delayed photoluminescence. The energy gap between the doublet and triplet excited states of Ce(CzPhTp)3 is reduced by the management of the inner and outer coordination spheres, thereby promoting efficient energy transfer between the two excited states and activating the delayed emission. The photoluminescence mechanism discovered may provide a new way for the design of efficient doublet emission and bring insights into rational molecular design and energy level regulation in open-shell molecules.

Abstract Image

铈(III)配合物的延迟双重态发射
近年来,开壳分子的双重态发射显示出其研究和应用价值。然而,对开壳分子的光致发光机理的了解远远少于对闭壳分子的了解,这给高效双重发射系统的分子设计带来了挑战。本文报道了铈(III) 4-(9h -羧基-9-基)苯基-三(吡唑基)硼酸盐配合物Ce(CzPhTp)3,该配合物具有新的延迟双重态发光机制,这也是金属中心延迟光致发光的第一个例子。通过内外配位球的管理,减小了Ce(CzPhTp)3的双重态和三重态激发态之间的能隙,从而促进了两种激发态之间的有效能量转移,激活了延迟发射。所发现的光致发光机理可能为设计高效的双重态发射提供新的途径,并对合理的分子设计和开壳分子的能级调节提供新的见解。
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来源期刊
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.
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