A Three-Dimensional Dynamic Metal–Organic Framework with Fourfold Interpenetrating Diamondoid Networks and Selective Adsorption Properties

A three-dimensional metal–organic framework (1) with fourfold interpenetrating diamondoid networks was constructed using a macrocyclic nickel­(II) complex and a tetracarboxylic ligand 4,4′,4″,4‴-(cyclohexane-1,2-diyibis­(azanetriyl))­tetrakis­(methylene)­tetrabenzoic acid as building blocks. Despite the fourfold interpenetration, 1 possesses one-dimensional channels that are occupied by water and CH3CN guest molecules. Once the guest molecules were removed, the framework and pores in desolvated 1 are dynamic with large adsorption hysteresis loops, which exhibit selective gas adsorption for CO2 at 195 K over N2 and H2 at 77 K and selective adsorption for methanol, ethanol, and n-propanol over isopropanol at 298 K.