Luminescence properties of a family of lanthanide metal-organic frameworks
作者： Ahmed M. El-Zohry , Antonio Bermejo Gómez , Alejandro Valiente , Belén Martín-Matute , Anja-Verena Mudring
DOI: 10.1016/J.MICROMESO.2019.01.024
关键词: Lanthanide 、 Luminescence 、 Photoluminescence 、 Powder diffraction 、 Fourier transform infrared spectroscopy 、 Materials science 、 Spectroscopy 、 Solid-state chemistry 、 Physical chemistry 、 Thermal analysis
摘要: Abstract Two isostructural series of lanthanide metal-organic frameworks denoted as SUMOF-7II (Ln) and SUMOF-7IIB (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd) were synthesized using4,4′,4''-(pyridine-2,4,6-triyl)tris(benzoic acid) (H3L2) a mixture H3L2 4,4′,4′′-(benzene-1,3,5-triyl)tris(benzoic (H3BTB) linkers, respectively. Both characterized using powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermal analysis (TGA), photoluminescence spectroscopy. Photoluminescence measurements show that Eu-MOFs demonstrate red emission while Pr- Nd-MOFs display an in the near-infrared (NIR) range. On other hand, La-, Ce-, Sm- Gd-MOFs exhibit only ligand-centered emission. The average luminescence lifetimes are 1.3–1.4-fold longer than corresponding ones series. SUMOF-7IIs good photo- stability. Altogether, properties render them promising materials for applications including sensing, biosensing, telecommunications.
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