Deciphering Trends in Structural Parameters of RE-UiO-66 Metal–Organic Frameworks through Single Crystal Analysis

Abstract

Single crystals of a family of rare-earth-metal− organic frameworks (RE-MOFs), RE-UiO-66 where RE = Sm(III), Eu(III), Gd(III), Tb(III), Dy(III), Ho(III), Er(III), Tm(III), Yb(III), and Lu(III), are successfully synthesized and their structures resolved through single-crystal X-ray diffraction. Different structural parameters, including unit cell dimensions and bond distances, are explored to discover trends between those structural parameters, ionic radii of the RE ions in the MOF structures, and their thermal stability. Results suggest that subtle differences in metal-linker bond length can have a notable effect on thermal stability (± 60 °C).

Rare-earth UiO-66 for temperature sensing near room temperature

“…In one example, two new RE-UiO-66 analogues were reported (Lu- and Sm-UiO-66) and a series of single crystals were synthesized and analysed to relate structural trends to thermal stability in ten RE-UiO-66 analogues. 35 In another study, the RE-UiO-66 platform was modified to generate new bimetallic and trimetallic MOFs containing Tb 3+ , Gd 3+ , and Eu 3+ , giving rise to a material with white-light emitting properties. 16…”

Vegard's law in multivariate libraries of porous interpenetrated zirconia organic frameworks

“…8 In MOF synthesis, Vegard's law has been previously observed, but mostly to the mixing of metal ions. 9–19 From the point of view of the organic links, only a handful of examples have been presented. 20–28…”