UoC‐11: An Interpenetrating MOF from Fluorinated BTB Ligands and a 1‐D Mg Based SBU

Abstract

A new MOF, named UoC‐11 (UoC = University of Cologne, [Mg4(3F‐BTB)2(OAc)2(DMF)6] · DMF), based on a fluorinated BTB (4,4′,4″‐benzene‐1,3,5‐triyl‐tris‐(benzoate)) derivative and Mg cations was synthesized incorporating additional acetate anions. Its crystal structure was determined from single crystal X‐ray diffraction data (P21/c, Z = 4). It consists of one‐dimensional Mg‐SBUs (strands), interconnected perpendicularly by tritopic linkers forming a dense two‐fold interpenetrating 3D network. Thus, only very small voids are formed which are fully occupied by the solvent. After activation at 150 °C (24 hours), no meaningful N2 adsorption was observed. Compared to the Ca and Sr analogues UoC‐9, UoC‐11 does not exhibit a crystal sponge behaviour. Thermal analysis (TGA) shows a release of all solvent molecules up to ~280 °C and the decomposition of the framework starts above 300 °C.