Fig. 1: Schematic of the synthesis of sol-gel MOF monoliths.
From: Stress–strain relationships and yielding of metal-organic framework monoliths
a The high concentration reaction (HCR) synthetic approach involves the deprotonation of the organic linker using a base, i.e. triethylamine (NEt3), which accelerates the production of metal-organic clusters and subsequently increases the number of nucleation sites, resulting in the formation of nanoparticles small enough to induce the formation of a gel. These nanoparticles coalesce and solidify to form the monolith as the gel dries at room temperature (RT). b Cage-type architecture of a unit cell of ZIF-8. c Channel-type architecture of the MIL-68 framework.
