Yuan Jiangyan, Feng Guangyuan, Dong Jie, Lei Shengbin, Hu Wenping
Department of Chemistry, School of Science & Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, China.
Nanoscale. 2021 Aug 7;13(29):12466-12474. doi: 10.1039/d1nr03006j. Epub 2021 Jul 21.
The development of optical materials with room temperature phosphorescence (RTP) and white light emission (WLEDs) is highly desirable and remains a challenging task. Herein, a porous metal-organic framework PCN-921 with a high quantum yield (Φ = 93.6%) was achieved. To make full use of the advantages of the high porosity of PCN-921, we hierarchically encapsulated different guest molecules coronene and rhodamine B (RhB) into the framework. Unsurprisingly, the hybrid material coronene@PCN-921 was obtained after in situ encapsulation of the guest coronene into the framework, and it exhibits obvious RTP behavior with a long phosphorescence lifetime of 62.5 ns. Subsequently, second guest RhB molecules were introduced after soaking in RhB solution and the material RhB@coronene@PCN-921 was achieved. Interestingly, it exhibits white light emission with the CIE coordinates of (0.29, 0.34), and can be used as a high performance WLED lamp. This is the first work on dual-functional hybrid dyes@MOFs with hierarchical guest encapsulation for RTP and white light emission, which suggests the potential applications of MOFs in multifunctional optical devices.
开发具有室温磷光（RTP）和白光发射（WLED）的光学材料是非常令人期待的，但仍然是一项具有挑战性的任务。在此，制备了一种具有高量子产率（Φ = 93.6%）的多孔金属有机框架PCN-921。为了充分利用PCN-921高孔隙率的优势，我们将不同的客体分子蒄和罗丹明B（RhB）分层封装到该框架中。不出所料，在将客体蒄原位封装到框架中后得到了杂化材料蒄@PCN-921，它表现出明显的RTP行为，磷光寿命长达62.5 ns。随后，将其浸泡在RhB溶液中引入第二种客体RhB分子，得到了材料RhB@蒄@PCN-921。有趣的是，它表现出白光发射，CIE坐标为（0.29, 0.34），并且可以用作高性能WLED灯。这是首次关于具有分层客体封装用于RTP和白光发射的双功能杂化染料@金属有机框架的研究工作，这表明了金属有机框架在多功能光学器件中的潜在应用。
