An efficient thermally activated delayed fluorophore featuring an oxygen-locked azaryl ketone acceptor

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED Dyes and Pigments Pub Date : 2024-10-16 DOI:10.1016/j.dyepig.2024.112496

Wen-Cheng Chen , Xiao-Long Liu , Ru-Jia Wang , Xiaohui Wu , Jia-Ming Jin , Fan Zheng , Chengxiang Shi , Qing-Dan Yang , Yaocheng Jin , Jia-Xiong Chen , Yuxi Sun , Qingming Zeng , Nian He , Fang Huang , Yanping Huo

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Abstract

Thermally activated delayed fluorescence (TADF) dyes are promising for applications like bioimaging, sensing, and optoelectronic devices due to their efficient exciton utilization without noble metals, making them ideal for organic light-emitting diodes (OLEDs). In this contribution, we introduce a new TADF emitter, 3-(9,9-dimethylacridin-10(9H)-yl)-12H-chromeno[2,3-b]quinolin-12-one (CQLO-DMAC), which incorporates an intramolecular oxygen-locked azaryl ketone acceptor, CQLO. This design enhances molecular rigidity and electron-accepting strength. The CQLO-DMAC compound, featuring a bulky donor, shows significant intramolecular charge transfer and TADF emission. Comprehensive analyses, including spectroscopic studies and theoretical calculations, reveal high luminescence efficiency and reduced non-radiative losses. Utilizing CQLO-DMAC in OLEDs, we achieved a green-yellow emission peak at 548 nm and a maximum external quantum efficiency of 17.4 %. The findings highlight the potential of CQLQ as a highly effective acceptor in designing of TADF electroluminescent dyes.

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一种高效热激活延迟荧光团，具有锁氧氮杂环丁酮受体

热激活延迟荧光（TADF）染料在生物成像、传感和光电设备等应用领域大有可为，因为它们无需贵金属就能高效利用激子，是有机发光二极管（OLED）的理想选择。在这篇论文中，我们介绍了一种新型 TADF 发射器--3-(9,9-二甲基吖啶-10(9H)-基)-12H-色烯并[2,3-b]喹啉-12-酮（CQLO-DMAC），它结合了分子内锁氧氮杂环丁酮受体 CQLO。这种设计增强了分子的刚性和电子接受强度。CQLO-DMAC 化合物具有笨重的供体，显示出显著的分子内电荷转移和 TADF 发射。包括光谱研究和理论计算在内的综合分析表明，这种化合物具有很高的发光效率，并减少了非辐射损失。我们在有机发光二极管中利用 CQLO-DMAC 实现了 548 纳米波长处的黄绿色发射峰，最大外部量子效率达到 17.4%。这些发现凸显了 CQLQ 作为一种高效受体在设计 TADF 电致发光染料中的潜力。

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.