Synthesis and gas sorption behaviour of ZIF-90 with large pore volume

Stoichiometric triethylamine in methanol produces sub-micron ZIF-90 in 98% yield with the largest gas uptakes ever measured. Micropore volume and surface area are compatible with an empty pore network and with crystallographic data, but the occurrence of crystal defects, such as missing ligands or Zn2+ ions, although improbable, can not be ruled out.