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Abstract Three lanthanide–metal organic frameworks, namely, [Ln2(H2L)(DMF)2(H2O)2]·4H2O [Ln = Tb (1); Eu (2); Gd (3)] have been prepared and structurally characterized. Isostructural Ln-MOFs (1)–(3) display unique 3D frameworks with (412·63) topology. Remarkably,… Click to show full abstract
Abstract Three lanthanide–metal organic frameworks, namely, [Ln2(H2L)(DMF)2(H2O)2]·4H2O [Ln = Tb (1); Eu (2); Gd (3)] have been prepared and structurally characterized. Isostructural Ln-MOFs (1)–(3) display unique 3D frameworks with (412·63) topology. Remarkably, Ln-MOFs (1) and (2) show intense characteristic red and green emissions and long lifetimes thanks to the “antenna” linker of H2L6− anions. Codoped Eu/Tb-MOFs (4)-(12) were synthesized by varying the Eu3+:Tb3+ stoichiometry. More importantly, such codoped Eu/Tb-MOF material emits multiple emission colors by enhancement and quenching of different Ln3+ centers, which could applied to potential barcode materials. In addition, by adjusting different excitation wavelengths, the luminescence control of codoped Eu/Tb-MOFs (4)-(12) is achieved.
Journal Title: Dyes and Pigments
Year Published: 2019
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