Fluorous Metal−Organic Frameworks for High-Density Gas Adsorption

Abstract

A fluorous metal−organic framework, FMOF-1, is obtained by reaction of Ag(I) with 3,5-bis(trifluoromethyl)-1,2,4-triazolate, giving rise to a neutral, hydrogen-free, extended 3D nanotubular porous framework consisting of tetranuclear clusters [Ag4Tz6] connected by three-coordinate Ag(I) centers. The fluoro-lined channels and cavities of the framework show hysteretic adsorption of H2 with a volumetric capacity of 41 kg/m3 at 77 K and 64 bar. The framework also exhibits very high adsorptions for O2 and N2 with volumetric uptake of ∼550 and 400 kg/m3 at 77 K even at very low pressures (<10-2 bar).