On the Synthesis and Characterization of Lanthanide Metal-Organic Frameworks

Abstract

Abstract:In this study, lanthanide metal-organic frameworks Ln(BTC)(DMF) 2 (H 2 O) (LnMOFs) are synthesized using the metal nitrates as lanthanide (Ln = La, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb and Lu) source and 1,3,5-benzenetricarboxylic acid (BTC) as a coordination ligand. X-ray diffraction (XRD) analysis, Fourier-transform infrared spectroscopy (FTIR), thermogravimetric (TG/DTG) analysis fluorescence spectroscopy (FLS), and scanning electron microscopy (SEM) are employed to characterize the newly synthesized LnMOFs.

Expanding the Transuranic Metal–Organic Framework Portfolio: The Optical Properties of Americium(III) MOF-76

“…The lanthanide-bearing MOF-76 family is of particular interest here because this isostructural series is a rare example where all Ln 3+ ions are represented . Moreover, this system is known for its high thermal stability and unique photoluminescence properties, such as optical color tuning and analyte capture and sensing. , These photophysical properties stem from efficient ligand-to-metal resonance energy transfer, wherein irradiation with ultraviolet light induces strong sensitized emission from the metal centers (e.g., in the Eu 3+ , Tb 3+ , and Sm 3+ analogs). , The aptly termed antenna effect is a desirable attribute for probing Am 3+ photophysics because the photoluminescence emission of this 5f element is notoriously weak; thus, enhancing the luminescence intensity would increase the ease of study …”

Optimization and Synthesis of a La-TMA MOF with Some Improvements in Its Properties

“…Of course, their obtained products have some differences. Some of these differences and their unit cells are shown in Table . ,− A La­(BTC) with a micro-spindly rectangular rod shape and some of its graphene oxide composites were synthesized by Liu et al, which had BET surface areas of 14.8 m 2 /g for the MOF and, as the best result, 26.6 m 2 /g for its graphene oxide composite. Furthermore, they acted as good absorbents for proteins (especially for hemoglobin) .…”