Pressure treatment enables white-light emission in Zn-IPA MOF via asymmetrical metal-ligand chelate coordination

IF 15.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Nature Communications Pub Date : 2025-01-15 DOI:10.1038/s41467-025-55978-9

Qing Yang, Weibin Wang, Yunfeng Yang, Pengyuan Li, Xinyi Yang, Fuquan Bai, Bo Zou

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Abstract

Metal-organic frameworks that feature hybrid fluorescence and phosphorescence offer unique advantages in white-emitting communities based on their multiple emission centers and high exciton utilization. However, it poses a substantial challenge to realize superior white-light emission in single-component metal-organic frameworks without encapsulating varying chromophores or integrating multiple phosphor subunits. Here, we achieve a high-performance white-light emission with photoluminescence quantum yield of 81.3% via boosting triplet excitons distribution through pressure treatment in single-component Zn-IPA metal-organic frameworks. A novel metal-ligand asymmetrical chelate coordination is successfully integrated into the Zn-IPA after a high-pressure treatment over ~20.0 GPa. This modification unexpectedly endows the targeted sample with a new emergent electronic state to narrow the singlet-triplet energy gap, which effectively accelerates the spin-flipping process for boosted triplet excitons population. Time delay phosphor-converted light-emitting diodes are fabricated with long emission time up to ~7 s after switching off, providing significant advancements for white-light and time-delay lighting applications.

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压力处理使锌- ipa MOF通过不对称金属配体螯合配合实现白光发射

具有混合荧光和磷光特性的金属有机框架因其多个发射中心和高激子利用率而在白光发射群中具有独特的优势。然而，要在单组分金属有机框架中实现卓越的白光发射，而不封装不同的发色团或集成多个荧光粉亚基，是一项巨大的挑战。在这里，我们通过在单组分 Zn-IPA 金属有机框架中进行压力处理来促进三重激子分布，从而实现了高性能的白光发射，光量子产率达到 81.3%。经过约 20.0 GPa 的高压处理后，一种新型的金属配体不对称螯合物配位成功地整合到了 Zn-IPA 中。这种修饰意外地赋予了目标样品一种新的新兴电子态，从而缩小了单重-三重能隙，有效地加速了三重激子群的自旋翻转过程。制造出的延时荧光粉转换发光二极管在关闭后的发射时间可长达约 7 秒，为白光和延时照明应用提供了重大进展。

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来源期刊

Nature Communications Biological Science Disciplines-

CiteScore

24.90

自引率

2.40%

发文量

6928

审稿时长

3.7 months

期刊介绍： Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.