Water friendly room temperature phosphorescence doped materials prepared via metal organic framework matrix transformation. (February 2023)

• Record Type: Journal Article
• Authors: Ni, Ai-Yun; Zhang, Bo-Lun; Zhang, Pei-Pei; Zhang, Jian-Jun; Wang, Hui-Yu; Feng, Ke-Xin; Liu, Shuqin; Ni, Jun; Duan, Chunying
• Is Part Of: Dyes and pigments. Volume 210(2023)
• Publication Date: 2023-02
• Subjects: Stimuli-responsive -- Metal-organic framework -- Composite -- Water-induced -- Room temperature phosphorescence; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2022.110959
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: Stimuli-responsive room temperature phosphorescence (RTP) materials have wide applications. However, it is still a challenge to achieve water-induced recovery afterglow materials, and materials can maintain afterglow after prolonged contact with water. Herein we show that a RTP-silent metal-organic framework (MOF), MOF-5, can immediately emit green RTP upon water stimulation. Detailed studies show water causes transformation of MOF-5 into another more tightly packed framework. Besides, strong hydrogen bond network is constructed by H2 O molecules trapped in the channels. Both factors limit the motion of the ligand and stabilize the triplet state, resulting in RTP. Such structural transformation can be further used as a new doping strategy to prepare a series of water-awakened RTP phosphor@MOF composites with RTP color ranging from green to orange-red and durations of 3–6 s. Remarkably, the RTP of the composites can maintain at least six weeks when being soaked in water. Water-induced information encryption based on the composites has been demonstrated. This work not only sheds new light on the developing of water-friendly MOF-based RTP materials, but also provides a new strategy for the preparation of doped afterglow materials. Graphical abstract: Image 1 Present here is a new strategy to prepare phosphor/matrix composites with tunable room temperature phosphorescence properties evoked by water through structural transformation of the MOF matrix. Highlights: Water-awakened recovery room temperature phosphorescence. A new strategy to prepare RTP phosphor/matrix composite. Excellent water-stable RTP performance.