Dynamic multi-color long-afterglow and cold-warm white light through phosphorescence resonance energy transfer in host-guest metal-organic frameworks

IF 10.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Science China Chemistry Pub Date : 2023-10-24 DOI:10.1007/s11426-023-1656-y

Shuya Liu, Yuhang Lin, Dongpeng Yan

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引用次数: 0

Abstract

Dynamic tuning of single-color and multi-color (including white-light) luminescence has attracted much attention for applications in various fields; however, effective systems are still scarcity to date. Herein, we report the construction of host-guest metal-organic frameworks (MOFs) serves as an effective strategy to achieve the excitation- and time-dependent long afterglow and white light emitting, simultaneously. The guest-induced structural distortion modulates the single-triplet state intersystem crossing, promotes ligand-to-ligand charge transfer (LLCT) in layer-column MOFs, and further boosts multiple exciton generation of triplet states for multi-color ultralong phosphorescence, as indicated by both experiment and density functional theory (DFT) calculation. By further doping of dyes into MOFs, white-light emitting with tunable color temperature can be facilely obtained, which has been further fabricated into white-light light-emitting diode (LED) with color rendering index of 88.4, higher than that of most as-reported pure inorganics and inorganic-organic hybrid systems. Therefore, this work not only describes a host-guest energy transfer route for dynamic tailoring wide range of color-tunable long-afterglow, but also explores the application prospect of new white-light materials with high color rendering and low blue light for promising display and lighting applications.

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主客体金属有机框架中磷光共振能量转移的动态多色长余辉和冷暖白光

单色和多色(包括白光)发光的动态调谐在各个领域的应用备受关注;然而，迄今为止，有效的系统仍然稀缺。本文中，我们报道了主客体金属有机框架(mof)的构建是一种有效的策略，可以同时实现与激发和时间相关的长余辉和白光发射。实验和密度泛函理论(DFT)计算表明，客体诱导的结构畸变调节了单三重态系统间的交叉，促进了层-柱mof中配体到配体的电荷转移(LLCT)，并进一步促进了多色超长磷光中三重态的多个激子的产生。通过在mof中进一步掺杂染料，可以很容易地获得色温可调的白光，并制成显色指数为88.4的白光发光二极管(LED)，高于大多数报道的纯无机物和无机-有机杂化体系。因此，本工作不仅描述了一种动态裁剪大范围可调色长余辉的主客能量传递路线，而且探索了具有高显色性和低蓝光的新型白光材料在显示和照明领域的应用前景。

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

Science China Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

14.40

自引率

7.30%

发文量

3787

审稿时长

2.2 months

期刊介绍： Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field. Categories of articles include: Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry. Perspectives. Concise reports on thelatest chemistry trends of interest to scientists worldwide, including discussions of research breakthroughs and interpretations of important science and funding policies. Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.