Fig. 1: Schematic graphics illustrating the principle of MOF melting.
From: Melt-quenched carboxylate metal–organic framework glasses

For the MOF to melt, partial decoordiation of the metal-ligand bonds have to occur before the thermal decomposition of framework (Tm < Td). Therefore, a meltable MOF can be designed by controlling Tm and Td. The arrow with the red cross indicates that when a MOF has a higher Tm than Td, the melting process is forbidden during the heating process.