They are being thought of as offering a route for combining the intriguing properties of MOFs with the processing ability of conventional glasses. To date, however, this combination of properties has not yet been demonstrated. MOFs are reticular crystalline materials consisting of inorganic metal nodes interconnected by organic ligands. They feature large porosity, tailorable for a wide range of applications through versatile combinations of node and ligand species . Only a few MOFs from the ZIF subclass have been discovered to be meltable before thermal decomposition; subsequent quenching of the melt led to a glassy state (denoted ag) with the ability to retain a certain resemblance to the original MOF . Although some features of ZIF glasses remain disputed , first reports on the optical and mechanical properties of agZIF-62 showed promising results in terms of indeed resembling inorganic glass materials. For the case of cobalt-substituted agZIF-62(Co), non-linear optical responses and photoluminescence were reported. All of these studies build on the promise that glassy MOFs could -in principle -be processed in their liquid state so as to attain a broad variety of geometrical shapes. This would offer substantial advantages over their crystalline counterparts, which typically require some kind of powder processing and/or binder phases compromising potential applications.