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Synthesis and Characterization of a Layered Scandium MOF Containing a Sulfone‐Functionalized V‐Shaped Linker Molecule
Author(s) -
Rönfeldt Pia,
Reinsch Helge,
Faßheber Nancy,
Terraschke Huayna,
Stock Norbert
Publication year - 2020
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202000011
Subject(s) - isostructural , chemistry , crystallography , thermogravimetric analysis , powder diffraction , orthorhombic crystal system , scandium , solvothermal synthesis , molecule , rietveld refinement , lanthanide , stacking , luminescence , crystal structure , inorganic chemistry , ion , materials science , organic chemistry , optoelectronics
A new scandium metal‐organic framework (MOF) with the composition [Sc(OH)(SDBA)], denoted Sc‐CAU‐11, was synthesized under solvothermal reaction conditions using 4,4‐sulfonyldibenzoic acid (H 2 SDBA), as a V‐shaped linker molecule. The crystal structure was refined from powder X‐ray diffraction (PXRD) data employing the Rietveld method and using the structural model of the isostructural aluminium compound. Sc‐CAU‐11 crystallizes in the orthorhombic space group Pnma and is composed of chains of trans corner‐sharing ScO 6 octahedra. The chains are connected by the linker molecules to form layers with intralayer porosity and an ABAB stacking sequence. Detailed characterization was carried out by elemental analysis, IR‐spectroscopy, thermogravimetric analysis, gas sorption and luminescence measurements. Sc‐CAU‐11 shows a high thermal stability up to 500 °C in air, which is confirmed by temperature‐depended PXRD measurements. The optical properties were tuned by substituting Sc 3+ ions in Sc‐CAU‐11 with trivalent europium and terbium ions and strong temperature as well as excitation dependent optical emission is observed.