Inorganic glasses are a long-studied class of materials, usually obtained through quenching from a liquid phase at sufficient speeds to avoid recrystallisation. The variety of glasses is vast; it comprises many subfamilies with very distinct optical, electronic, and mechanical properties.

In contrast, metal-organic frameworks (MOFs) are a relatively new class of materials. They are comprised of inorganic nodes joined by organic linkers, and in their crystalline state, these materials typically display high porosity. Despite their comparative novelty, over 80,000 distinct crystal structures are recorded in the literature. A handful of these MOFs are shown to melt when heated in inert atmospheres, and they form glasses upon cooling.¹ Albeit still small in variety, researchers have demonstrated already that this new class of MOF-derived glasses exhibit unique properties, such as the persistence of porosity in the liquid and quenched states.²