Abstract
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 (H2SDBA), 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 ScO6 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 Sc3+ ions in Sc‐CAU‐11 with trivalent europium and terbium ions and strong temperature as well as excitation dependent optical emission is observed.
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