Two calcium-based metal organic frameworks with long afterglow as anticounterfeiting materials
CHEMICAL ENGINEERING JOURNAL(2024)
摘要
Calcium-based metal-organic frameworks (Ca-MOFs) with room-temperature phosphorescence (RTP) properties are promising for applications. Herein, two 3D Ca-MOFs with robust RTP have been successfully synthesized with scaled-up production. The afterglows of these two Ca-MOFs are visible to the naked eye in darkness that lasts for approximately 13 s once they are excited with 365 nm UV light. It is mainly attributed to the rigid and dense structures of 3D Ca-MOFs via 4,5-Imidazole dicarboxylic acid tugging Ca2+ elucidated by means of single-crystal X-ray diffraction and density functional theory (DFT). Furthermore, a program was designed for dynamic anti-counterfeiting based on the long afterglow properties of Ca-MOFs, which can be extended for all kinds of ma-terial with long afterglow.
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关键词
Calcium-based metal -organic frameworks,Room-temperature phosphorescence,Long afterglow,Anti-counterfeiting
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