Linear Dependence of Photoluminescence in Mixed Ln-MOFs for Color Tunability and Barcode Application

Abstract

Multicolored photoluminescence tuning in a single-phase material has invaluable potential in display and security applications. By deliberate design of a multifunctional antenna ligand and precise control of mixed metal ionic compositions in lanthanide metal-organic frameworks (Ln-MOFs), we achieved dichromatic fine-tuning among red, green, or blue primary colors through growth of a series of isomorphous Ln-MOF crystals·solvents of formula [LnnLn'1-n(TTP)2·H2O]Cl3 (Ln = Ln' = Eu, Tb, and Gd, 1-3; Ln = Eu, Ln' = Tb, 4-8; Ln = Gd, Ln' = Eu, 9-11; Ln = Gd, Ln' = Tb, 12-14; 0 < n < 1; TTP = 1',1″-(2,4,6-trimethylbenzene-1,3,5-triyl)tris(methylene)tris(pyridine-4(1H)-one)). The linear dependence of the emissions were analyzed, and the mathematical matrix models were established, which are useful to control the synthetic conditions and to predict the color chromaticity coordinates under varied excitation wavelengths. The potential relevance of these multicolored photoluminescent Ln-MOFs to barcoded materials was demonstrated.

Multi-Emissive Lanthanide-Based Coordination Polymers for Potential Application as Luminescent Bar-Codes

“…Another technological request is the design of multi-emissive materials that would emit in a broad wavelength range and therefore act as sort of luminescent bar-codes. Several examples of luminescent bar code have been reported so far [50][51][52][53][54] but examples of systems that fulfill these requirements are scarce. 54 Recently a series of lanthanide-based coordination polymers with 5-methoxyisophthalate (hereafter symbolized by mip 2-) as ligand has been reported.…”

High Brightness and Easy Color Modulation in Lanthanide-Based Coordination Polymers with 5-Methoxyisophthalate as Ligand: Toward Emission Colors Additive Strategy

“…More recently, lanthanide-based coordination polymers have proved their interest as taggants for fight against counterfeiting [23] because they can present highly flexible luminescence. [24,25] Some of us are engaged in the synthesis and study of lanthanidebased coordination polymers for more than twenty years [26] mainly focusing their attention on benzene-poly-carboxylate ligands. [27] In recent years we have studied several series with isophthalate derivatives as ligands [28][29][30][31][32] (See Scheme 1).…”

Photoluminescent organisms: how to make fungi glow through biointegration with lanthanide metal-organic frameworks

“…S18(b)). Owing to the energy transfer pathways between Eu (acceptor) and Tb (donor) centres being blocked in the physical mixture of the adjacent Eu- and Tb-MOFs particles, the spectral profile (relative emission band amplitude or colour coordinate) can be used to estimate the relative molar ration between Ln-MOFs 48–50 . Thus, we can infer that the amounts of Eu- and Tb-MOFs incorporated by the P .…”