Science and Technology Production
Congress
Authorship
Martinez Villarroel, R.
;
German E Gomez
;
Pedro H. Santiago
;
Javier Ellena
;
BERNINI, MARIA CELESTE
Date
2024
Publishing House and Editing Place
USP
Summary
Information provided by the agent in
SIGEVA
Metal-organic frameworks (MOFs) are crystalline materials assembled via the coordination of metal centers with multitopic organic ligands, forming periodic networks that exhibit a potential void volume. Recently, MOFs have gained attention for applications in gas adsorption, controlled drug release, catalysis, and luminescence. In particular, the use of certain rare earth ions in combination with organic ligands that act as sensitizers (antenna effect) can produce luminescent MOFs [1]. This stu...
Metal-organic frameworks (MOFs) are crystalline materials assembled via the coordination of metal centers with multitopic organic ligands, forming periodic networks that exhibit a potential void volume. Recently, MOFs have gained attention for applications in gas adsorption, controlled drug release, catalysis, and luminescence. In particular, the use of certain rare earth ions in combination with organic ligands that act as sensitizers (antenna effect) can produce luminescent MOFs [1]. This study presents the synthesis of a MOFs family based on rare earth ions (RE3+) and 1,4-naphthalenedicarboxylic acid (1,4-H₂NDC) as ligand. Solvothermal method employing a solvent mixture of DMF/H₂O (3:2), adjusting the pH with HNO₃, and heating at 120 °C for 72 h, led to the formation of high-quality single crystals suitable for single-crystal XRD study in the case of the Er3+ member. The crystallographic study revealed that this compound (RE-1,4-NDC) has the formula [RE2(1,4-NDC)3(DMF)] and crystallizes in the monoclinic space group P2₁/c (Fig. 1), with cell parameters a = 11.0082(4), b = 20.2488(7), c = 16.2598(12), 109.768(7), V = 3410.77 (Z = 4), being isostructural with another previously reported Eu3+ MOF [2].Additionally, polycrystalline solids isostructural to Er-1,4-NDC were obtained based on an Y3+ matrix doped with Er3+, Yb3+, and Gd3+ ions (Fig. 2), tending to design novel compounds suitable to exhibit up-conversion (UC) luminescence. The motivation for synthesizing these UC-luminescent MOFs is based on their potential applications contrast agents for bioimaging, particularly useful in cancer diagnostics [3]. Moreover, since UC materials absorbing near-infrared (NIR) photons and convert them into visible light, such materials also find application in the enhancement of 4th generation solar cell efficiency [4].
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Key Words
CRISTALOGRAFIA1,4-NAFTALENDICARBOXILATODIFRACCION DE MONOCRISTALMOF