Two Novel Lanthanide Metal-Organic Frameworks Constructed by Tetracarboxylate Ligands: Synthesis, Structures; and Luminescent Properties

摘要

Two new isostructural lanthanide metal-organic frameworks were synthesized using lanthanide oxides and 3,3,4,4-benzophenonetetracarboxylic acid (H4BPTC), namely, [Ln(BPTC)(H2O)(2.5)] [Ln = Eu (1), Gd (2)] under hydrothermal conditions. 1 and 2 revealed porous three-dimensional structures, possessing a binodal 4, 8-connected flu network defined by dinuclear building units. 1 and 2 were characterized by powder X-ray diffraction (PXRD), thermogravimetric analysis (TG), infrared radiation (IR), and photoluminescence (PL) spectra. Furthermore, 1 exhibits red-light emission under UV light irradiation and the sharp light can be easily observed by naked eyes.