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IF 16.1 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Angewandte Chemie International Edition Pub Date : 2024-12-17 DOI:10.1002/anie.202421036

Ping Jiang, Bingbing Ding, Jiayi Yao, Lei Zhou, Zhenyi He, Zizhao Huang, Chenjia Yin, He Tian, Xiang Ma

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引用次数: 0

摘要

开发具有可调高温余辉（HTA）发光特性的智能材料仍然是一项艰巨的挑战。本研究提出了一种以硼酸为基质、多环芳烃为掺杂剂的无金属掺杂系统。这种成分实现了动态可调的余辉，即使在 150°C 温度下也能持续十多秒钟的明亮蓝色 HTA 和 110°C 以下的超长黄色室温磷光。观察到的 HTA 可归因于掺杂剂分子内的热释放激子重组，与传统的三重相关磷光和热激活延迟荧光相比，它具有出色的温度耐受性。掺杂剂的平面性在调节德克斯特电子转移（ET）以捕获释放的电子方面起着关键作用，从而影响可调 HTA 的整体性能。这项研究提供了一种高效、通用的掺杂策略，通过热释放电子、德克斯特电子转移和激子重组的协同作用来设计可调 HTA。

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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Thermal Modulation of Exciton Recombination for High‐Temperature Ultra‐Long Afterglow

Developing smart materials with tunable high‐temperature afterglow (HTA) luminescence remains a formidable challenge. This study presents a metal‐free doping system using boric acid as matrix and polycyclic aromatic hydrocarbons as dopants. This composition achieves dynamically tunable afterglow combining a bright blue HTA lasting for over ten seconds even at 150°C and an ultra‐long yellow room‐temperature phosphorescence below 110°C. The observed HTA is attributed to the thermally released exciton recombination within the dopant molecules, which shows excellent temperature tolerance compared to traditional triplet related phosphorescence and thermally activated delayed fluorescence. The planarity of dopants is extensively investigated playing a pivotal role in modulating Dexter electron transfer (ET) for capturing released electrons and thereby affecting the overall performance of tunable HTA. This work provides an efficient and universal doping strategy to engineer tunable HTA through the synergistic action of thermally releasing electrons, Dexter ET and exciton recombination.

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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.