Synthesis Of Lanthanide Metal-Organic Frameworks Based On 2,6-Pyridinedicarboxylic Acid With Color Tunable And White Light Emission

Solid state light emitting materials have attracted extensive attention because of their diverse applications in lighting, transportation, auto-mobiles, communication, imaging, agriculture, and medicine. White-light emitting materials deserve particular attention due to their promising applications, such as backlight sources in color displays, biomedical imaging, photodynamic therapy and other photonic devices. The lanthanide metal-organic frameworks?LnMOFs?, in particular,display interesting optical properties such as sharp and intense luminescence, long lifetime, emission in the primary color range?red, blue and green?that fully spans the entire visible spectrum, thus can be used in designing white-light materials.A new family of lanthanide metal-organic frameworks,{[Ln₂?L?₃ (H₂O₃]·H₂O}n (Ln=La³⁺, Eu³⁺, Tb³⁺, Ce³⁺,Pr³⁺, Nd³⁺, Sm³⁺, H₂L=2,6-Pyridinedicarboxylic acid) were synthesisized under hydrothermal conditions based on a simple ligand?pyridine-2,6-dicarboxylate?. All LnMOFs are isostructural based upon the analyses of single crystal and Power X-ray diffraction. The optical properties of compounds LnL can be easily tuned by doping methods,allowing for the syntheses of the materials with enhanced visible emission properties.We construct isostructural doped materials whose colors can be easily tuned by the different combination of the doped Tb³⁺ and Eu³⁺ concentrations,achieving white light emitting materials.