Transformation of Zirconium Metal–Organic Cages to Metal–Organic Gels

] cluster and forms amorphous MOGs with terephthalic acid-based ligands. The reported Zr-MOCs based on terephthalic acid-based ligands with different substituent groups, longer biphenyl dicarboxylic acids, and trimesic acids all undergo such MOC-to-MOG transformations, indicating good versatility for this transformation. In addition, the posttreatment of amorphous MOGs with an appropriate amount of acetic acid could regulate the crystallinity of the MOGs, thus giving rise to MOGs containing nano-UiO-66-type MOF crystals and xerogels with improved porosity.