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UoC‐4: A MOF Based on Octahedral ScO 6 Nodes and Fluorinated Trimesate Ligands
Author(s) -
Mattick Tim,
Smets Daniel,
Christoffels Ronja,
Körtgen Lisa,
Tobeck Christian,
Ruschewitz Uwe
Publication year - 2021
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.202000432
Subject(s) - octahedron , inert gas , carboxylate , solvent , sorption , thermal decomposition , metal organic framework , hydrolysis , molecule , crystal structure , butane , crystallography , chemistry , benzene , materials science , catalysis , stereochemistry , organic chemistry , adsorption
A new MOF (metal‐organic framework),∞ 3 [Sc( dF ‐BTC) 6/6 ]⋅solvent with dF ‐BTC 3− =2,4‐difluoro‐1,3,5‐benzene‐tricarboxylate, termed UoC‐4 (UoC≡University of Cologne), was synthesized by solvothermal reaction in an ethanol/water solvent mixture. The crystal structure of UoC‐4 was solved and refined from X‐ray single crystal data ( I 4 1 / amd , Z =8). In the crystal structure each of the three carboxylate groups of the dF ‐BTC 3− linker coordinates to two Sc 3+ cations, resulting in an almost ideal ScO 6 octahedron. The connectivity of these ScO 6 and dF ‐BTC 3− building units leads to a 3D framework structure with a new unprecedented topology. Small voids with a diameter of <5 Å are formed, in which most likely disordered ethanol molecules reside. UoC‐4 is stable against moisture, but in water a slow hydrolysis occurs. Thermal decomposition in an inert atmosphere starts above 400 °C. Activation of the material failed so that no gas sorption isotherm with N 2 as test gas could be recorded. The small pores within UoC‐4 are obviously not accessible for gases like N 2 due to very small opening windows.